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llvm-for-llvmta/test/CodeGen/X86/clear-lowbits.ll

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=i686-unknown-linux-gnu -mattr=-bmi,-tbm,-bmi2 < %s | FileCheck %s --check-prefixes=X86,X86-NOBMI2
; RUN: llc -mtriple=i686-unknown-linux-gnu -mattr=+bmi,-tbm,-bmi2 < %s | FileCheck %s --check-prefixes=X86,X86-NOBMI2
; RUN: llc -mtriple=i686-unknown-linux-gnu -mattr=+bmi,+tbm,-bmi2 < %s | FileCheck %s --check-prefixes=X86,X86-NOBMI2
; RUN: llc -mtriple=i686-unknown-linux-gnu -mattr=+bmi,+tbm,+bmi2 < %s | FileCheck %s --check-prefixes=X86,X86-BMI2
; RUN: llc -mtriple=i686-unknown-linux-gnu -mattr=+bmi,-tbm,+bmi2 < %s | FileCheck %s --check-prefixes=X86,X86-BMI2
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=-bmi,-tbm,-bmi2 < %s | FileCheck %s --check-prefixes=X64,X64-NOBMI2
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=+bmi,-tbm,-bmi2 < %s | FileCheck %s --check-prefixes=X64,X64-NOBMI2
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=+bmi,+tbm,-bmi2 < %s | FileCheck %s --check-prefixes=X64,X64-NOBMI2
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=+bmi,+tbm,+bmi2 < %s | FileCheck %s --check-prefixes=X64,X64-BMI2
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=+bmi,-tbm,+bmi2 < %s | FileCheck %s --check-prefixes=X64,X64-BMI2
; Patterns:
; c) x & (-1 << y)
; ic) x & (-1 << (32 - y))
; d) x >> y << y
; id) x >> (32 - y) << (32 - y)
; are equivalent, but we prefer the second variant if we have BMI2.
; ---------------------------------------------------------------------------- ;
; Pattern c.
; ---------------------------------------------------------------------------- ;
; 8-bit
define i8 @clear_lowbits8_c0(i8 %val, i8 %numlowbits) nounwind {
; X86-LABEL: clear_lowbits8_c0:
; X86: # %bb.0:
; X86-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NEXT: movb {{[0-9]+}}(%esp), %al
; X86-NEXT: shrb %cl, %al
; X86-NEXT: shlb %cl, %al
; X86-NEXT: retl
;
; X64-LABEL: clear_lowbits8_c0:
; X64: # %bb.0:
; X64-NEXT: movl %esi, %ecx
; X64-NEXT: movl %edi, %eax
; X64-NEXT: shrb %cl, %al
; X64-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NEXT: shlb %cl, %al
; X64-NEXT: # kill: def $al killed $al killed $eax
; X64-NEXT: retq
%mask = shl i8 -1, %numlowbits
%masked = and i8 %mask, %val
ret i8 %masked
}
define i8 @clear_lowbits8_c2_load(i8* %w, i8 %numlowbits) nounwind {
; X86-LABEL: clear_lowbits8_c2_load:
; X86: # %bb.0:
; X86-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: movb (%eax), %al
; X86-NEXT: shrb %cl, %al
; X86-NEXT: shlb %cl, %al
; X86-NEXT: retl
;
; X64-LABEL: clear_lowbits8_c2_load:
; X64: # %bb.0:
; X64-NEXT: movl %esi, %ecx
; X64-NEXT: movb (%rdi), %al
; X64-NEXT: shrb %cl, %al
; X64-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NEXT: shlb %cl, %al
; X64-NEXT: retq
%val = load i8, i8* %w
%mask = shl i8 -1, %numlowbits
%masked = and i8 %mask, %val
ret i8 %masked
}
define i8 @clear_lowbits8_c4_commutative(i8 %val, i8 %numlowbits) nounwind {
; X86-LABEL: clear_lowbits8_c4_commutative:
; X86: # %bb.0:
; X86-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NEXT: movb {{[0-9]+}}(%esp), %al
; X86-NEXT: shrb %cl, %al
; X86-NEXT: shlb %cl, %al
; X86-NEXT: retl
;
; X64-LABEL: clear_lowbits8_c4_commutative:
; X64: # %bb.0:
; X64-NEXT: movl %esi, %ecx
; X64-NEXT: movl %edi, %eax
; X64-NEXT: shrb %cl, %al
; X64-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NEXT: shlb %cl, %al
; X64-NEXT: # kill: def $al killed $al killed $eax
; X64-NEXT: retq
%mask = shl i8 -1, %numlowbits
%masked = and i8 %val, %mask ; swapped order
ret i8 %masked
}
; 16-bit
define i16 @clear_lowbits16_c0(i16 %val, i16 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits16_c0:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movzwl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits16_c0:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movzwl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: shrxl %ecx, %eax, %eax
; X86-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X86-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits16_c0:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movzwl %di, %eax
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits16_c0:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: movzwl %di, %eax
; X64-BMI2-NEXT: shrxl %esi, %eax, %eax
; X64-BMI2-NEXT: shlxl %esi, %eax, %eax
; X64-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-BMI2-NEXT: retq
%mask = shl i16 -1, %numlowbits
%masked = and i16 %mask, %val
ret i16 %masked
}
define i16 @clear_lowbits16_c1_indexzext(i16 %val, i8 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits16_c1_indexzext:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movzwl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits16_c1_indexzext:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movzwl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: shrxl %ecx, %eax, %eax
; X86-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X86-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits16_c1_indexzext:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movzwl %di, %eax
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits16_c1_indexzext:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: movzwl %di, %eax
; X64-BMI2-NEXT: shrxl %esi, %eax, %eax
; X64-BMI2-NEXT: shlxl %esi, %eax, %eax
; X64-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-BMI2-NEXT: retq
%sh_prom = zext i8 %numlowbits to i16
%mask = shl i16 -1, %sh_prom
%masked = and i16 %mask, %val
ret i16 %masked
}
define i16 @clear_lowbits16_c2_load(i16* %w, i16 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits16_c2_load:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: movzwl (%eax), %eax
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits16_c2_load:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %al
; X86-BMI2-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-BMI2-NEXT: movzwl (%ecx), %ecx
; X86-BMI2-NEXT: shrxl %eax, %ecx, %ecx
; X86-BMI2-NEXT: shlxl %eax, %ecx, %eax
; X86-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits16_c2_load:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movzwl (%rdi), %eax
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits16_c2_load:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: movzwl (%rdi), %eax
; X64-BMI2-NEXT: shrxl %esi, %eax, %eax
; X64-BMI2-NEXT: shlxl %esi, %eax, %eax
; X64-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-BMI2-NEXT: retq
%val = load i16, i16* %w
%mask = shl i16 -1, %numlowbits
%masked = and i16 %mask, %val
ret i16 %masked
}
define i16 @clear_lowbits16_c3_load_indexzext(i16* %w, i8 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits16_c3_load_indexzext:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: movzwl (%eax), %eax
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits16_c3_load_indexzext:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %al
; X86-BMI2-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-BMI2-NEXT: movzwl (%ecx), %ecx
; X86-BMI2-NEXT: shrxl %eax, %ecx, %ecx
; X86-BMI2-NEXT: shlxl %eax, %ecx, %eax
; X86-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits16_c3_load_indexzext:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movzwl (%rdi), %eax
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits16_c3_load_indexzext:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: movzwl (%rdi), %eax
; X64-BMI2-NEXT: shrxl %esi, %eax, %eax
; X64-BMI2-NEXT: shlxl %esi, %eax, %eax
; X64-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-BMI2-NEXT: retq
%val = load i16, i16* %w
%sh_prom = zext i8 %numlowbits to i16
%mask = shl i16 -1, %sh_prom
%masked = and i16 %mask, %val
ret i16 %masked
}
define i16 @clear_lowbits16_c4_commutative(i16 %val, i16 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits16_c4_commutative:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movzwl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits16_c4_commutative:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movzwl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: shrxl %ecx, %eax, %eax
; X86-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X86-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits16_c4_commutative:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movzwl %di, %eax
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits16_c4_commutative:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: movzwl %di, %eax
; X64-BMI2-NEXT: shrxl %esi, %eax, %eax
; X64-BMI2-NEXT: shlxl %esi, %eax, %eax
; X64-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-BMI2-NEXT: retq
%mask = shl i16 -1, %numlowbits
%masked = and i16 %val, %mask ; swapped order
ret i16 %masked
}
; 32-bit
define i32 @clear_lowbits32_c0(i32 %val, i32 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits32_c0:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits32_c0:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %al
; X86-BMI2-NEXT: shrxl %eax, {{[0-9]+}}(%esp), %ecx
; X86-BMI2-NEXT: shlxl %eax, %ecx, %eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits32_c0:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movl %edi, %eax
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits32_c0:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: shrxl %esi, %edi, %eax
; X64-BMI2-NEXT: shlxl %esi, %eax, %eax
; X64-BMI2-NEXT: retq
%mask = shl i32 -1, %numlowbits
%masked = and i32 %mask, %val
ret i32 %masked
}
define i32 @clear_lowbits32_c1_indexzext(i32 %val, i8 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits32_c1_indexzext:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits32_c1_indexzext:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %al
; X86-BMI2-NEXT: shrxl %eax, {{[0-9]+}}(%esp), %ecx
; X86-BMI2-NEXT: shlxl %eax, %ecx, %eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits32_c1_indexzext:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movl %edi, %eax
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits32_c1_indexzext:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: shrxl %esi, %edi, %eax
; X64-BMI2-NEXT: shlxl %esi, %eax, %eax
; X64-BMI2-NEXT: retq
%sh_prom = zext i8 %numlowbits to i32
%mask = shl i32 -1, %sh_prom
%masked = and i32 %mask, %val
ret i32 %masked
}
define i32 @clear_lowbits32_c2_load(i32* %w, i32 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits32_c2_load:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: movl (%eax), %eax
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits32_c2_load:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: shrxl %ecx, (%eax), %eax
; X86-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits32_c2_load:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movl (%rdi), %eax
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits32_c2_load:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: shrxl %esi, (%rdi), %eax
; X64-BMI2-NEXT: shlxl %esi, %eax, %eax
; X64-BMI2-NEXT: retq
%val = load i32, i32* %w
%mask = shl i32 -1, %numlowbits
%masked = and i32 %mask, %val
ret i32 %masked
}
define i32 @clear_lowbits32_c3_load_indexzext(i32* %w, i8 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits32_c3_load_indexzext:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: movl (%eax), %eax
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits32_c3_load_indexzext:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: shrxl %ecx, (%eax), %eax
; X86-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits32_c3_load_indexzext:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movl (%rdi), %eax
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits32_c3_load_indexzext:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: shrxl %esi, (%rdi), %eax
; X64-BMI2-NEXT: shlxl %esi, %eax, %eax
; X64-BMI2-NEXT: retq
%val = load i32, i32* %w
%sh_prom = zext i8 %numlowbits to i32
%mask = shl i32 -1, %sh_prom
%masked = and i32 %mask, %val
ret i32 %masked
}
define i32 @clear_lowbits32_c4_commutative(i32 %val, i32 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits32_c4_commutative:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits32_c4_commutative:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %al
; X86-BMI2-NEXT: shrxl %eax, {{[0-9]+}}(%esp), %ecx
; X86-BMI2-NEXT: shlxl %eax, %ecx, %eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits32_c4_commutative:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movl %edi, %eax
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits32_c4_commutative:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: shrxl %esi, %edi, %eax
; X64-BMI2-NEXT: shlxl %esi, %eax, %eax
; X64-BMI2-NEXT: retq
%mask = shl i32 -1, %numlowbits
%masked = and i32 %val, %mask ; swapped order
ret i32 %masked
}
; 64-bit
define i64 @clear_lowbits64_c0(i64 %val, i64 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits64_c0:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl $-1, %edx
; X86-NOBMI2-NEXT: movl $-1, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: testb $32, %cl
; X86-NOBMI2-NEXT: je .LBB13_2
; X86-NOBMI2-NEXT: # %bb.1:
; X86-NOBMI2-NEXT: movl %eax, %edx
; X86-NOBMI2-NEXT: xorl %eax, %eax
; X86-NOBMI2-NEXT: .LBB13_2:
; X86-NOBMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits64_c0:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: movl $-1, %edx
; X86-BMI2-NEXT: shlxl %ecx, %edx, %eax
; X86-BMI2-NEXT: testb $32, %cl
; X86-BMI2-NEXT: je .LBB13_2
; X86-BMI2-NEXT: # %bb.1:
; X86-BMI2-NEXT: movl %eax, %edx
; X86-BMI2-NEXT: xorl %eax, %eax
; X86-BMI2-NEXT: .LBB13_2:
; X86-BMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits64_c0:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movq %rsi, %rcx
; X64-NOBMI2-NEXT: movq %rdi, %rax
; X64-NOBMI2-NEXT: shrq %cl, %rax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $rcx
; X64-NOBMI2-NEXT: shlq %cl, %rax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits64_c0:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: shrxq %rsi, %rdi, %rax
; X64-BMI2-NEXT: shlxq %rsi, %rax, %rax
; X64-BMI2-NEXT: retq
%mask = shl i64 -1, %numlowbits
%masked = and i64 %mask, %val
ret i64 %masked
}
define i64 @clear_lowbits64_c1_indexzext(i64 %val, i8 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits64_c1_indexzext:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl $-1, %edx
; X86-NOBMI2-NEXT: movl $-1, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: testb $32, %cl
; X86-NOBMI2-NEXT: je .LBB14_2
; X86-NOBMI2-NEXT: # %bb.1:
; X86-NOBMI2-NEXT: movl %eax, %edx
; X86-NOBMI2-NEXT: xorl %eax, %eax
; X86-NOBMI2-NEXT: .LBB14_2:
; X86-NOBMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits64_c1_indexzext:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: movl $-1, %edx
; X86-BMI2-NEXT: shlxl %ecx, %edx, %eax
; X86-BMI2-NEXT: testb $32, %cl
; X86-BMI2-NEXT: je .LBB14_2
; X86-BMI2-NEXT: # %bb.1:
; X86-BMI2-NEXT: movl %eax, %edx
; X86-BMI2-NEXT: xorl %eax, %eax
; X86-BMI2-NEXT: .LBB14_2:
; X86-BMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits64_c1_indexzext:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movq %rdi, %rax
; X64-NOBMI2-NEXT: shrq %cl, %rax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shlq %cl, %rax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits64_c1_indexzext:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: # kill: def $esi killed $esi def $rsi
; X64-BMI2-NEXT: shrxq %rsi, %rdi, %rax
; X64-BMI2-NEXT: shlxq %rsi, %rax, %rax
; X64-BMI2-NEXT: retq
%sh_prom = zext i8 %numlowbits to i64
%mask = shl i64 -1, %sh_prom
%masked = and i64 %mask, %val
ret i64 %masked
}
define i64 @clear_lowbits64_c2_load(i64* %w, i64 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits64_c2_load:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: pushl %esi
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %esi
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl $-1, %edx
; X86-NOBMI2-NEXT: movl $-1, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: testb $32, %cl
; X86-NOBMI2-NEXT: je .LBB15_2
; X86-NOBMI2-NEXT: # %bb.1:
; X86-NOBMI2-NEXT: movl %eax, %edx
; X86-NOBMI2-NEXT: xorl %eax, %eax
; X86-NOBMI2-NEXT: .LBB15_2:
; X86-NOBMI2-NEXT: andl (%esi), %eax
; X86-NOBMI2-NEXT: andl 4(%esi), %edx
; X86-NOBMI2-NEXT: popl %esi
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits64_c2_load:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: pushl %ebx
; X86-BMI2-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %bl
; X86-BMI2-NEXT: movl $-1, %edx
; X86-BMI2-NEXT: shlxl %ebx, %edx, %eax
; X86-BMI2-NEXT: testb $32, %bl
; X86-BMI2-NEXT: je .LBB15_2
; X86-BMI2-NEXT: # %bb.1:
; X86-BMI2-NEXT: movl %eax, %edx
; X86-BMI2-NEXT: xorl %eax, %eax
; X86-BMI2-NEXT: .LBB15_2:
; X86-BMI2-NEXT: andl (%ecx), %eax
; X86-BMI2-NEXT: andl 4(%ecx), %edx
; X86-BMI2-NEXT: popl %ebx
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits64_c2_load:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movq %rsi, %rcx
; X64-NOBMI2-NEXT: movq (%rdi), %rax
; X64-NOBMI2-NEXT: shrq %cl, %rax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $rcx
; X64-NOBMI2-NEXT: shlq %cl, %rax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits64_c2_load:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: shrxq %rsi, (%rdi), %rax
; X64-BMI2-NEXT: shlxq %rsi, %rax, %rax
; X64-BMI2-NEXT: retq
%val = load i64, i64* %w
%mask = shl i64 -1, %numlowbits
%masked = and i64 %mask, %val
ret i64 %masked
}
define i64 @clear_lowbits64_c3_load_indexzext(i64* %w, i8 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits64_c3_load_indexzext:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: pushl %esi
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %esi
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl $-1, %edx
; X86-NOBMI2-NEXT: movl $-1, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: testb $32, %cl
; X86-NOBMI2-NEXT: je .LBB16_2
; X86-NOBMI2-NEXT: # %bb.1:
; X86-NOBMI2-NEXT: movl %eax, %edx
; X86-NOBMI2-NEXT: xorl %eax, %eax
; X86-NOBMI2-NEXT: .LBB16_2:
; X86-NOBMI2-NEXT: andl (%esi), %eax
; X86-NOBMI2-NEXT: andl 4(%esi), %edx
; X86-NOBMI2-NEXT: popl %esi
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits64_c3_load_indexzext:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: pushl %ebx
; X86-BMI2-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %bl
; X86-BMI2-NEXT: movl $-1, %edx
; X86-BMI2-NEXT: shlxl %ebx, %edx, %eax
; X86-BMI2-NEXT: testb $32, %bl
; X86-BMI2-NEXT: je .LBB16_2
; X86-BMI2-NEXT: # %bb.1:
; X86-BMI2-NEXT: movl %eax, %edx
; X86-BMI2-NEXT: xorl %eax, %eax
; X86-BMI2-NEXT: .LBB16_2:
; X86-BMI2-NEXT: andl (%ecx), %eax
; X86-BMI2-NEXT: andl 4(%ecx), %edx
; X86-BMI2-NEXT: popl %ebx
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits64_c3_load_indexzext:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movq (%rdi), %rax
; X64-NOBMI2-NEXT: shrq %cl, %rax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shlq %cl, %rax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits64_c3_load_indexzext:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: # kill: def $esi killed $esi def $rsi
; X64-BMI2-NEXT: shrxq %rsi, (%rdi), %rax
; X64-BMI2-NEXT: shlxq %rsi, %rax, %rax
; X64-BMI2-NEXT: retq
%val = load i64, i64* %w
%sh_prom = zext i8 %numlowbits to i64
%mask = shl i64 -1, %sh_prom
%masked = and i64 %mask, %val
ret i64 %masked
}
define i64 @clear_lowbits64_c4_commutative(i64 %val, i64 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits64_c4_commutative:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl $-1, %edx
; X86-NOBMI2-NEXT: movl $-1, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: testb $32, %cl
; X86-NOBMI2-NEXT: je .LBB17_2
; X86-NOBMI2-NEXT: # %bb.1:
; X86-NOBMI2-NEXT: movl %eax, %edx
; X86-NOBMI2-NEXT: xorl %eax, %eax
; X86-NOBMI2-NEXT: .LBB17_2:
; X86-NOBMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits64_c4_commutative:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: movl $-1, %edx
; X86-BMI2-NEXT: shlxl %ecx, %edx, %eax
; X86-BMI2-NEXT: testb $32, %cl
; X86-BMI2-NEXT: je .LBB17_2
; X86-BMI2-NEXT: # %bb.1:
; X86-BMI2-NEXT: movl %eax, %edx
; X86-BMI2-NEXT: xorl %eax, %eax
; X86-BMI2-NEXT: .LBB17_2:
; X86-BMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits64_c4_commutative:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movq %rsi, %rcx
; X64-NOBMI2-NEXT: movq %rdi, %rax
; X64-NOBMI2-NEXT: shrq %cl, %rax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $rcx
; X64-NOBMI2-NEXT: shlq %cl, %rax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits64_c4_commutative:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: shrxq %rsi, %rdi, %rax
; X64-BMI2-NEXT: shlxq %rsi, %rax, %rax
; X64-BMI2-NEXT: retq
%mask = shl i64 -1, %numlowbits
%masked = and i64 %val, %mask ; swapped order
ret i64 %masked
}
; ---------------------------------------------------------------------------- ;
; Pattern ic.
; ---------------------------------------------------------------------------- ;
; 8-bit
define i8 @clear_lowbits8_ic0(i8 %val, i8 %numlowbits) nounwind {
; X86-LABEL: clear_lowbits8_ic0:
; X86: # %bb.0:
; X86-NEXT: movb {{[0-9]+}}(%esp), %al
; X86-NEXT: movb $8, %cl
; X86-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NEXT: shrb %cl, %al
; X86-NEXT: shlb %cl, %al
; X86-NEXT: retl
;
; X64-LABEL: clear_lowbits8_ic0:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %eax
; X64-NEXT: movb $8, %cl
; X64-NEXT: subb %sil, %cl
; X64-NEXT: shrb %cl, %al
; X64-NEXT: shlb %cl, %al
; X64-NEXT: # kill: def $al killed $al killed $eax
; X64-NEXT: retq
%numhighbits = sub i8 8, %numlowbits
%mask = shl i8 -1, %numhighbits
%masked = and i8 %mask, %val
ret i8 %masked
}
define i8 @clear_lowbits8_ic2_load(i8* %w, i8 %numlowbits) nounwind {
; X86-LABEL: clear_lowbits8_ic2_load:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: movb (%eax), %al
; X86-NEXT: movb $8, %cl
; X86-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NEXT: shrb %cl, %al
; X86-NEXT: shlb %cl, %al
; X86-NEXT: retl
;
; X64-LABEL: clear_lowbits8_ic2_load:
; X64: # %bb.0:
; X64-NEXT: movb (%rdi), %al
; X64-NEXT: movb $8, %cl
; X64-NEXT: subb %sil, %cl
; X64-NEXT: shrb %cl, %al
; X64-NEXT: shlb %cl, %al
; X64-NEXT: retq
%val = load i8, i8* %w
%numhighbits = sub i8 8, %numlowbits
%mask = shl i8 -1, %numhighbits
%masked = and i8 %mask, %val
ret i8 %masked
}
define i8 @clear_lowbits8_ic4_commutative(i8 %val, i8 %numlowbits) nounwind {
; X86-LABEL: clear_lowbits8_ic4_commutative:
; X86: # %bb.0:
; X86-NEXT: movb {{[0-9]+}}(%esp), %al
; X86-NEXT: movb $8, %cl
; X86-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NEXT: shrb %cl, %al
; X86-NEXT: shlb %cl, %al
; X86-NEXT: retl
;
; X64-LABEL: clear_lowbits8_ic4_commutative:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %eax
; X64-NEXT: movb $8, %cl
; X64-NEXT: subb %sil, %cl
; X64-NEXT: shrb %cl, %al
; X64-NEXT: shlb %cl, %al
; X64-NEXT: # kill: def $al killed $al killed $eax
; X64-NEXT: retq
%numhighbits = sub i8 8, %numlowbits
%mask = shl i8 -1, %numhighbits
%masked = and i8 %val, %mask ; swapped order
ret i8 %masked
}
; 16-bit
define i16 @clear_lowbits16_ic0(i16 %val, i16 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits16_ic0:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movzwl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: movb $16, %cl
; X86-NOBMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits16_ic0:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movzwl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: movb $16, %cl
; X86-BMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: shrxl %ecx, %eax, %eax
; X86-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X86-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits16_ic0:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movzwl %di, %eax
; X64-NOBMI2-NEXT: movb $16, %cl
; X64-NOBMI2-NEXT: subb %sil, %cl
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits16_ic0:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: movzwl %di, %eax
; X64-BMI2-NEXT: movb $16, %cl
; X64-BMI2-NEXT: subb %sil, %cl
; X64-BMI2-NEXT: shrxl %ecx, %eax, %eax
; X64-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X64-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-BMI2-NEXT: retq
%numhighbits = sub i16 16, %numlowbits
%mask = shl i16 -1, %numhighbits
%masked = and i16 %mask, %val
ret i16 %masked
}
define i16 @clear_lowbits16_ic1_indexzext(i16 %val, i8 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits16_ic1_indexzext:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movzwl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: movb $16, %cl
; X86-NOBMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits16_ic1_indexzext:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movzwl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: movb $16, %cl
; X86-BMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: shrxl %ecx, %eax, %eax
; X86-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X86-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits16_ic1_indexzext:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movzwl %di, %eax
; X64-NOBMI2-NEXT: movb $16, %cl
; X64-NOBMI2-NEXT: subb %sil, %cl
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits16_ic1_indexzext:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: movzwl %di, %eax
; X64-BMI2-NEXT: movb $16, %cl
; X64-BMI2-NEXT: subb %sil, %cl
; X64-BMI2-NEXT: shrxl %ecx, %eax, %eax
; X64-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X64-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-BMI2-NEXT: retq
%numhighbits = sub i8 16, %numlowbits
%sh_prom = zext i8 %numhighbits to i16
%mask = shl i16 -1, %sh_prom
%masked = and i16 %mask, %val
ret i16 %masked
}
define i16 @clear_lowbits16_ic2_load(i16* %w, i16 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits16_ic2_load:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: movzwl (%eax), %eax
; X86-NOBMI2-NEXT: movb $16, %cl
; X86-NOBMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits16_ic2_load:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: movzwl (%eax), %eax
; X86-BMI2-NEXT: movb $16, %cl
; X86-BMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: shrxl %ecx, %eax, %eax
; X86-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X86-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits16_ic2_load:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movzwl (%rdi), %eax
; X64-NOBMI2-NEXT: movb $16, %cl
; X64-NOBMI2-NEXT: subb %sil, %cl
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits16_ic2_load:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: movzwl (%rdi), %eax
; X64-BMI2-NEXT: movb $16, %cl
; X64-BMI2-NEXT: subb %sil, %cl
; X64-BMI2-NEXT: shrxl %ecx, %eax, %eax
; X64-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X64-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-BMI2-NEXT: retq
%val = load i16, i16* %w
%numhighbits = sub i16 16, %numlowbits
%mask = shl i16 -1, %numhighbits
%masked = and i16 %mask, %val
ret i16 %masked
}
define i16 @clear_lowbits16_ic3_load_indexzext(i16* %w, i8 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits16_ic3_load_indexzext:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: movzwl (%eax), %eax
; X86-NOBMI2-NEXT: movb $16, %cl
; X86-NOBMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits16_ic3_load_indexzext:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: movzwl (%eax), %eax
; X86-BMI2-NEXT: movb $16, %cl
; X86-BMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: shrxl %ecx, %eax, %eax
; X86-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X86-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits16_ic3_load_indexzext:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movzwl (%rdi), %eax
; X64-NOBMI2-NEXT: movb $16, %cl
; X64-NOBMI2-NEXT: subb %sil, %cl
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits16_ic3_load_indexzext:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: movzwl (%rdi), %eax
; X64-BMI2-NEXT: movb $16, %cl
; X64-BMI2-NEXT: subb %sil, %cl
; X64-BMI2-NEXT: shrxl %ecx, %eax, %eax
; X64-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X64-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-BMI2-NEXT: retq
%val = load i16, i16* %w
%numhighbits = sub i8 16, %numlowbits
%sh_prom = zext i8 %numhighbits to i16
%mask = shl i16 -1, %sh_prom
%masked = and i16 %mask, %val
ret i16 %masked
}
define i16 @clear_lowbits16_ic4_commutative(i16 %val, i16 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits16_ic4_commutative:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movzwl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: movb $16, %cl
; X86-NOBMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits16_ic4_commutative:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movzwl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: movb $16, %cl
; X86-BMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: shrxl %ecx, %eax, %eax
; X86-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X86-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits16_ic4_commutative:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movzwl %di, %eax
; X64-NOBMI2-NEXT: movb $16, %cl
; X64-NOBMI2-NEXT: subb %sil, %cl
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits16_ic4_commutative:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: movzwl %di, %eax
; X64-BMI2-NEXT: movb $16, %cl
; X64-BMI2-NEXT: subb %sil, %cl
; X64-BMI2-NEXT: shrxl %ecx, %eax, %eax
; X64-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X64-BMI2-NEXT: # kill: def $ax killed $ax killed $eax
; X64-BMI2-NEXT: retq
%numhighbits = sub i16 16, %numlowbits
%mask = shl i16 -1, %numhighbits
%masked = and i16 %val, %mask ; swapped order
ret i16 %masked
}
; 32-bit
define i32 @clear_lowbits32_ic0(i32 %val, i32 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits32_ic0:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: xorl %ecx, %ecx
; X86-NOBMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits32_ic0:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: xorl %eax, %eax
; X86-BMI2-NEXT: subb {{[0-9]+}}(%esp), %al
; X86-BMI2-NEXT: shrxl %eax, {{[0-9]+}}(%esp), %ecx
; X86-BMI2-NEXT: shlxl %eax, %ecx, %eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits32_ic0:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movl %edi, %eax
; X64-NOBMI2-NEXT: negb %cl
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits32_ic0:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: negb %sil
; X64-BMI2-NEXT: shrxl %esi, %edi, %eax
; X64-BMI2-NEXT: shlxl %esi, %eax, %eax
; X64-BMI2-NEXT: retq
%numhighbits = sub i32 32, %numlowbits
%mask = shl i32 -1, %numhighbits
%masked = and i32 %mask, %val
ret i32 %masked
}
define i32 @clear_lowbits32_ic1_indexzext(i32 %val, i8 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits32_ic1_indexzext:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: xorl %ecx, %ecx
; X86-NOBMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits32_ic1_indexzext:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: xorl %eax, %eax
; X86-BMI2-NEXT: subb {{[0-9]+}}(%esp), %al
; X86-BMI2-NEXT: shrxl %eax, {{[0-9]+}}(%esp), %ecx
; X86-BMI2-NEXT: shlxl %eax, %ecx, %eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits32_ic1_indexzext:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movl %edi, %eax
; X64-NOBMI2-NEXT: negb %cl
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits32_ic1_indexzext:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: negb %sil
; X64-BMI2-NEXT: shrxl %esi, %edi, %eax
; X64-BMI2-NEXT: shlxl %esi, %eax, %eax
; X64-BMI2-NEXT: retq
%numhighbits = sub i8 32, %numlowbits
%sh_prom = zext i8 %numhighbits to i32
%mask = shl i32 -1, %sh_prom
%masked = and i32 %mask, %val
ret i32 %masked
}
define i32 @clear_lowbits32_ic2_load(i32* %w, i32 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits32_ic2_load:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: movl (%eax), %eax
; X86-NOBMI2-NEXT: xorl %ecx, %ecx
; X86-NOBMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits32_ic2_load:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: xorl %ecx, %ecx
; X86-BMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: shrxl %ecx, (%eax), %eax
; X86-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits32_ic2_load:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movl (%rdi), %eax
; X64-NOBMI2-NEXT: negb %cl
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits32_ic2_load:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: negb %sil
; X64-BMI2-NEXT: shrxl %esi, (%rdi), %eax
; X64-BMI2-NEXT: shlxl %esi, %eax, %eax
; X64-BMI2-NEXT: retq
%val = load i32, i32* %w
%numhighbits = sub i32 32, %numlowbits
%mask = shl i32 -1, %numhighbits
%masked = and i32 %mask, %val
ret i32 %masked
}
define i32 @clear_lowbits32_ic3_load_indexzext(i32* %w, i8 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits32_ic3_load_indexzext:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: movl (%eax), %eax
; X86-NOBMI2-NEXT: xorl %ecx, %ecx
; X86-NOBMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits32_ic3_load_indexzext:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: xorl %ecx, %ecx
; X86-BMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: shrxl %ecx, (%eax), %eax
; X86-BMI2-NEXT: shlxl %ecx, %eax, %eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits32_ic3_load_indexzext:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movl (%rdi), %eax
; X64-NOBMI2-NEXT: negb %cl
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits32_ic3_load_indexzext:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: negb %sil
; X64-BMI2-NEXT: shrxl %esi, (%rdi), %eax
; X64-BMI2-NEXT: shlxl %esi, %eax, %eax
; X64-BMI2-NEXT: retq
%val = load i32, i32* %w
%numhighbits = sub i8 32, %numlowbits
%sh_prom = zext i8 %numhighbits to i32
%mask = shl i32 -1, %sh_prom
%masked = and i32 %mask, %val
ret i32 %masked
}
define i32 @clear_lowbits32_ic4_commutative(i32 %val, i32 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits32_ic4_commutative:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: xorl %ecx, %ecx
; X86-NOBMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: shrl %cl, %eax
; X86-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits32_ic4_commutative:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: xorl %eax, %eax
; X86-BMI2-NEXT: subb {{[0-9]+}}(%esp), %al
; X86-BMI2-NEXT: shrxl %eax, {{[0-9]+}}(%esp), %ecx
; X86-BMI2-NEXT: shlxl %eax, %ecx, %eax
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits32_ic4_commutative:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movl %edi, %eax
; X64-NOBMI2-NEXT: negb %cl
; X64-NOBMI2-NEXT: shrl %cl, %eax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shll %cl, %eax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits32_ic4_commutative:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: negb %sil
; X64-BMI2-NEXT: shrxl %esi, %edi, %eax
; X64-BMI2-NEXT: shlxl %esi, %eax, %eax
; X64-BMI2-NEXT: retq
%numhighbits = sub i32 32, %numlowbits
%mask = shl i32 -1, %numhighbits
%masked = and i32 %val, %mask ; swapped order
ret i32 %masked
}
; 64-bit
define i64 @clear_lowbits64_ic0(i64 %val, i64 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits64_ic0:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movb $64, %cl
; X86-NOBMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl $-1, %edx
; X86-NOBMI2-NEXT: movl $-1, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: testb $32, %cl
; X86-NOBMI2-NEXT: je .LBB31_2
; X86-NOBMI2-NEXT: # %bb.1:
; X86-NOBMI2-NEXT: movl %eax, %edx
; X86-NOBMI2-NEXT: xorl %eax, %eax
; X86-NOBMI2-NEXT: .LBB31_2:
; X86-NOBMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits64_ic0:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movb $64, %cl
; X86-BMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: movl $-1, %edx
; X86-BMI2-NEXT: shlxl %ecx, %edx, %eax
; X86-BMI2-NEXT: testb $32, %cl
; X86-BMI2-NEXT: je .LBB31_2
; X86-BMI2-NEXT: # %bb.1:
; X86-BMI2-NEXT: movl %eax, %edx
; X86-BMI2-NEXT: xorl %eax, %eax
; X86-BMI2-NEXT: .LBB31_2:
; X86-BMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits64_ic0:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movq %rsi, %rcx
; X64-NOBMI2-NEXT: movq %rdi, %rax
; X64-NOBMI2-NEXT: negb %cl
; X64-NOBMI2-NEXT: shrq %cl, %rax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $rcx
; X64-NOBMI2-NEXT: shlq %cl, %rax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits64_ic0:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: negb %sil
; X64-BMI2-NEXT: shrxq %rsi, %rdi, %rax
; X64-BMI2-NEXT: shlxq %rsi, %rax, %rax
; X64-BMI2-NEXT: retq
%numhighbits = sub i64 64, %numlowbits
%mask = shl i64 -1, %numhighbits
%masked = and i64 %mask, %val
ret i64 %masked
}
define i64 @clear_lowbits64_ic1_indexzext(i64 %val, i8 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits64_ic1_indexzext:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movb $64, %cl
; X86-NOBMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl $-1, %edx
; X86-NOBMI2-NEXT: movl $-1, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: testb $32, %cl
; X86-NOBMI2-NEXT: je .LBB32_2
; X86-NOBMI2-NEXT: # %bb.1:
; X86-NOBMI2-NEXT: movl %eax, %edx
; X86-NOBMI2-NEXT: xorl %eax, %eax
; X86-NOBMI2-NEXT: .LBB32_2:
; X86-NOBMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits64_ic1_indexzext:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movb $64, %cl
; X86-BMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: movl $-1, %edx
; X86-BMI2-NEXT: shlxl %ecx, %edx, %eax
; X86-BMI2-NEXT: testb $32, %cl
; X86-BMI2-NEXT: je .LBB32_2
; X86-BMI2-NEXT: # %bb.1:
; X86-BMI2-NEXT: movl %eax, %edx
; X86-BMI2-NEXT: xorl %eax, %eax
; X86-BMI2-NEXT: .LBB32_2:
; X86-BMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits64_ic1_indexzext:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movq %rdi, %rax
; X64-NOBMI2-NEXT: negb %cl
; X64-NOBMI2-NEXT: shrq %cl, %rax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shlq %cl, %rax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits64_ic1_indexzext:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: # kill: def $esi killed $esi def $rsi
; X64-BMI2-NEXT: negb %sil
; X64-BMI2-NEXT: shrxq %rsi, %rdi, %rax
; X64-BMI2-NEXT: shlxq %rsi, %rax, %rax
; X64-BMI2-NEXT: retq
%numhighbits = sub i8 64, %numlowbits
%sh_prom = zext i8 %numhighbits to i64
%mask = shl i64 -1, %sh_prom
%masked = and i64 %mask, %val
ret i64 %masked
}
define i64 @clear_lowbits64_ic2_load(i64* %w, i64 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits64_ic2_load:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: pushl %esi
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %esi
; X86-NOBMI2-NEXT: movb $64, %cl
; X86-NOBMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl $-1, %edx
; X86-NOBMI2-NEXT: movl $-1, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: testb $32, %cl
; X86-NOBMI2-NEXT: je .LBB33_2
; X86-NOBMI2-NEXT: # %bb.1:
; X86-NOBMI2-NEXT: movl %eax, %edx
; X86-NOBMI2-NEXT: xorl %eax, %eax
; X86-NOBMI2-NEXT: .LBB33_2:
; X86-NOBMI2-NEXT: andl (%esi), %eax
; X86-NOBMI2-NEXT: andl 4(%esi), %edx
; X86-NOBMI2-NEXT: popl %esi
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits64_ic2_load:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: pushl %ebx
; X86-BMI2-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-BMI2-NEXT: movb $64, %bl
; X86-BMI2-NEXT: subb {{[0-9]+}}(%esp), %bl
; X86-BMI2-NEXT: movl $-1, %edx
; X86-BMI2-NEXT: shlxl %ebx, %edx, %eax
; X86-BMI2-NEXT: testb $32, %bl
; X86-BMI2-NEXT: je .LBB33_2
; X86-BMI2-NEXT: # %bb.1:
; X86-BMI2-NEXT: movl %eax, %edx
; X86-BMI2-NEXT: xorl %eax, %eax
; X86-BMI2-NEXT: .LBB33_2:
; X86-BMI2-NEXT: andl (%ecx), %eax
; X86-BMI2-NEXT: andl 4(%ecx), %edx
; X86-BMI2-NEXT: popl %ebx
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits64_ic2_load:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movq %rsi, %rcx
; X64-NOBMI2-NEXT: movq (%rdi), %rax
; X64-NOBMI2-NEXT: negb %cl
; X64-NOBMI2-NEXT: shrq %cl, %rax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $rcx
; X64-NOBMI2-NEXT: shlq %cl, %rax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits64_ic2_load:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: negb %sil
; X64-BMI2-NEXT: shrxq %rsi, (%rdi), %rax
; X64-BMI2-NEXT: shlxq %rsi, %rax, %rax
; X64-BMI2-NEXT: retq
%val = load i64, i64* %w
%numhighbits = sub i64 64, %numlowbits
%mask = shl i64 -1, %numhighbits
%masked = and i64 %mask, %val
ret i64 %masked
}
define i64 @clear_lowbits64_ic3_load_indexzext(i64* %w, i8 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits64_ic3_load_indexzext:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: pushl %esi
; X86-NOBMI2-NEXT: movl {{[0-9]+}}(%esp), %esi
; X86-NOBMI2-NEXT: movb $64, %cl
; X86-NOBMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl $-1, %edx
; X86-NOBMI2-NEXT: movl $-1, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: testb $32, %cl
; X86-NOBMI2-NEXT: je .LBB34_2
; X86-NOBMI2-NEXT: # %bb.1:
; X86-NOBMI2-NEXT: movl %eax, %edx
; X86-NOBMI2-NEXT: xorl %eax, %eax
; X86-NOBMI2-NEXT: .LBB34_2:
; X86-NOBMI2-NEXT: andl (%esi), %eax
; X86-NOBMI2-NEXT: andl 4(%esi), %edx
; X86-NOBMI2-NEXT: popl %esi
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits64_ic3_load_indexzext:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: pushl %ebx
; X86-BMI2-NEXT: movl {{[0-9]+}}(%esp), %ecx
; X86-BMI2-NEXT: movb $64, %bl
; X86-BMI2-NEXT: subb {{[0-9]+}}(%esp), %bl
; X86-BMI2-NEXT: movl $-1, %edx
; X86-BMI2-NEXT: shlxl %ebx, %edx, %eax
; X86-BMI2-NEXT: testb $32, %bl
; X86-BMI2-NEXT: je .LBB34_2
; X86-BMI2-NEXT: # %bb.1:
; X86-BMI2-NEXT: movl %eax, %edx
; X86-BMI2-NEXT: xorl %eax, %eax
; X86-BMI2-NEXT: .LBB34_2:
; X86-BMI2-NEXT: andl (%ecx), %eax
; X86-BMI2-NEXT: andl 4(%ecx), %edx
; X86-BMI2-NEXT: popl %ebx
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits64_ic3_load_indexzext:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movq (%rdi), %rax
; X64-NOBMI2-NEXT: negb %cl
; X64-NOBMI2-NEXT: shrq %cl, %rax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shlq %cl, %rax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits64_ic3_load_indexzext:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: # kill: def $esi killed $esi def $rsi
; X64-BMI2-NEXT: negb %sil
; X64-BMI2-NEXT: shrxq %rsi, (%rdi), %rax
; X64-BMI2-NEXT: shlxq %rsi, %rax, %rax
; X64-BMI2-NEXT: retq
%val = load i64, i64* %w
%numhighbits = sub i8 64, %numlowbits
%sh_prom = zext i8 %numhighbits to i64
%mask = shl i64 -1, %sh_prom
%masked = and i64 %mask, %val
ret i64 %masked
}
define i64 @clear_lowbits64_ic4_commutative(i64 %val, i64 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: clear_lowbits64_ic4_commutative:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: movb $64, %cl
; X86-NOBMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl $-1, %edx
; X86-NOBMI2-NEXT: movl $-1, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: testb $32, %cl
; X86-NOBMI2-NEXT: je .LBB35_2
; X86-NOBMI2-NEXT: # %bb.1:
; X86-NOBMI2-NEXT: movl %eax, %edx
; X86-NOBMI2-NEXT: xorl %eax, %eax
; X86-NOBMI2-NEXT: .LBB35_2:
; X86-NOBMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
; X86-NOBMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: clear_lowbits64_ic4_commutative:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: movb $64, %cl
; X86-BMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: movl $-1, %edx
; X86-BMI2-NEXT: shlxl %ecx, %edx, %eax
; X86-BMI2-NEXT: testb $32, %cl
; X86-BMI2-NEXT: je .LBB35_2
; X86-BMI2-NEXT: # %bb.1:
; X86-BMI2-NEXT: movl %eax, %edx
; X86-BMI2-NEXT: xorl %eax, %eax
; X86-BMI2-NEXT: .LBB35_2:
; X86-BMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
; X86-BMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: clear_lowbits64_ic4_commutative:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: movq %rsi, %rcx
; X64-NOBMI2-NEXT: movq %rdi, %rax
; X64-NOBMI2-NEXT: negb %cl
; X64-NOBMI2-NEXT: shrq %cl, %rax
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $rcx
; X64-NOBMI2-NEXT: shlq %cl, %rax
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: clear_lowbits64_ic4_commutative:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: negb %sil
; X64-BMI2-NEXT: shrxq %rsi, %rdi, %rax
; X64-BMI2-NEXT: shlxq %rsi, %rax, %rax
; X64-BMI2-NEXT: retq
%numhighbits = sub i64 64, %numlowbits
%mask = shl i64 -1, %numhighbits
%masked = and i64 %val, %mask ; swapped order
ret i64 %masked
}
; ---------------------------------------------------------------------------- ;
; Multi-use tests
; ---------------------------------------------------------------------------- ;
declare void @use32(i32)
declare void @use64(i64)
define i32 @oneuse32(i32 %val, i32 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: oneuse32:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: pushl %esi
; X86-NOBMI2-NEXT: subl $8, %esp
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl $-1, %esi
; X86-NOBMI2-NEXT: shll %cl, %esi
; X86-NOBMI2-NEXT: movl %esi, (%esp)
; X86-NOBMI2-NEXT: calll use32
; X86-NOBMI2-NEXT: andl {{[0-9]+}}(%esp), %esi
; X86-NOBMI2-NEXT: movl %esi, %eax
; X86-NOBMI2-NEXT: addl $8, %esp
; X86-NOBMI2-NEXT: popl %esi
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: oneuse32:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: pushl %esi
; X86-BMI2-NEXT: subl $8, %esp
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %al
; X86-BMI2-NEXT: movl $-1, %ecx
; X86-BMI2-NEXT: shlxl %eax, %ecx, %esi
; X86-BMI2-NEXT: movl %esi, (%esp)
; X86-BMI2-NEXT: calll use32
; X86-BMI2-NEXT: andl {{[0-9]+}}(%esp), %esi
; X86-BMI2-NEXT: movl %esi, %eax
; X86-BMI2-NEXT: addl $8, %esp
; X86-BMI2-NEXT: popl %esi
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: oneuse32:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: pushq %rbp
; X64-NOBMI2-NEXT: pushq %rbx
; X64-NOBMI2-NEXT: pushq %rax
; X64-NOBMI2-NEXT: movl %esi, %ecx
; X64-NOBMI2-NEXT: movl %edi, %ebx
; X64-NOBMI2-NEXT: movl $-1, %ebp
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NOBMI2-NEXT: shll %cl, %ebp
; X64-NOBMI2-NEXT: movl %ebp, %edi
; X64-NOBMI2-NEXT: callq use32
; X64-NOBMI2-NEXT: andl %ebx, %ebp
; X64-NOBMI2-NEXT: movl %ebp, %eax
; X64-NOBMI2-NEXT: addq $8, %rsp
; X64-NOBMI2-NEXT: popq %rbx
; X64-NOBMI2-NEXT: popq %rbp
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: oneuse32:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: pushq %rbp
; X64-BMI2-NEXT: pushq %rbx
; X64-BMI2-NEXT: pushq %rax
; X64-BMI2-NEXT: movl %edi, %ebx
; X64-BMI2-NEXT: movl $-1, %eax
; X64-BMI2-NEXT: shlxl %esi, %eax, %ebp
; X64-BMI2-NEXT: movl %ebp, %edi
; X64-BMI2-NEXT: callq use32
; X64-BMI2-NEXT: andl %ebx, %ebp
; X64-BMI2-NEXT: movl %ebp, %eax
; X64-BMI2-NEXT: addq $8, %rsp
; X64-BMI2-NEXT: popq %rbx
; X64-BMI2-NEXT: popq %rbp
; X64-BMI2-NEXT: retq
%mask = shl i32 -1, %numlowbits
call void @use32(i32 %mask)
%masked = and i32 %mask, %val
ret i32 %masked
}
define i64 @oneuse64(i64 %val, i64 %numlowbits) nounwind {
; X86-NOBMI2-LABEL: oneuse64:
; X86-NOBMI2: # %bb.0:
; X86-NOBMI2-NEXT: pushl %edi
; X86-NOBMI2-NEXT: pushl %esi
; X86-NOBMI2-NEXT: pushl %eax
; X86-NOBMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-NOBMI2-NEXT: movl $-1, %esi
; X86-NOBMI2-NEXT: movl $-1, %eax
; X86-NOBMI2-NEXT: shll %cl, %eax
; X86-NOBMI2-NEXT: xorl %edi, %edi
; X86-NOBMI2-NEXT: testb $32, %cl
; X86-NOBMI2-NEXT: jne .LBB37_1
; X86-NOBMI2-NEXT: # %bb.2:
; X86-NOBMI2-NEXT: movl %eax, %edi
; X86-NOBMI2-NEXT: jmp .LBB37_3
; X86-NOBMI2-NEXT: .LBB37_1:
; X86-NOBMI2-NEXT: movl %eax, %esi
; X86-NOBMI2-NEXT: .LBB37_3:
; X86-NOBMI2-NEXT: subl $8, %esp
; X86-NOBMI2-NEXT: pushl %esi
; X86-NOBMI2-NEXT: pushl %edi
; X86-NOBMI2-NEXT: calll use64
; X86-NOBMI2-NEXT: addl $16, %esp
; X86-NOBMI2-NEXT: andl {{[0-9]+}}(%esp), %edi
; X86-NOBMI2-NEXT: andl {{[0-9]+}}(%esp), %esi
; X86-NOBMI2-NEXT: movl %edi, %eax
; X86-NOBMI2-NEXT: movl %esi, %edx
; X86-NOBMI2-NEXT: addl $4, %esp
; X86-NOBMI2-NEXT: popl %esi
; X86-NOBMI2-NEXT: popl %edi
; X86-NOBMI2-NEXT: retl
;
; X86-BMI2-LABEL: oneuse64:
; X86-BMI2: # %bb.0:
; X86-BMI2-NEXT: pushl %edi
; X86-BMI2-NEXT: pushl %esi
; X86-BMI2-NEXT: pushl %eax
; X86-BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
; X86-BMI2-NEXT: movl $-1, %esi
; X86-BMI2-NEXT: shlxl %ecx, %esi, %eax
; X86-BMI2-NEXT: xorl %edi, %edi
; X86-BMI2-NEXT: testb $32, %cl
; X86-BMI2-NEXT: jne .LBB37_1
; X86-BMI2-NEXT: # %bb.2:
; X86-BMI2-NEXT: movl %eax, %edi
; X86-BMI2-NEXT: jmp .LBB37_3
; X86-BMI2-NEXT: .LBB37_1:
; X86-BMI2-NEXT: movl %eax, %esi
; X86-BMI2-NEXT: .LBB37_3:
; X86-BMI2-NEXT: subl $8, %esp
; X86-BMI2-NEXT: pushl %esi
; X86-BMI2-NEXT: pushl %edi
; X86-BMI2-NEXT: calll use64
; X86-BMI2-NEXT: addl $16, %esp
; X86-BMI2-NEXT: andl {{[0-9]+}}(%esp), %edi
; X86-BMI2-NEXT: andl {{[0-9]+}}(%esp), %esi
; X86-BMI2-NEXT: movl %edi, %eax
; X86-BMI2-NEXT: movl %esi, %edx
; X86-BMI2-NEXT: addl $4, %esp
; X86-BMI2-NEXT: popl %esi
; X86-BMI2-NEXT: popl %edi
; X86-BMI2-NEXT: retl
;
; X64-NOBMI2-LABEL: oneuse64:
; X64-NOBMI2: # %bb.0:
; X64-NOBMI2-NEXT: pushq %r14
; X64-NOBMI2-NEXT: pushq %rbx
; X64-NOBMI2-NEXT: pushq %rax
; X64-NOBMI2-NEXT: movq %rsi, %rcx
; X64-NOBMI2-NEXT: movq %rdi, %r14
; X64-NOBMI2-NEXT: movq $-1, %rbx
; X64-NOBMI2-NEXT: # kill: def $cl killed $cl killed $rcx
; X64-NOBMI2-NEXT: shlq %cl, %rbx
; X64-NOBMI2-NEXT: movq %rbx, %rdi
; X64-NOBMI2-NEXT: callq use64
; X64-NOBMI2-NEXT: andq %r14, %rbx
; X64-NOBMI2-NEXT: movq %rbx, %rax
; X64-NOBMI2-NEXT: addq $8, %rsp
; X64-NOBMI2-NEXT: popq %rbx
; X64-NOBMI2-NEXT: popq %r14
; X64-NOBMI2-NEXT: retq
;
; X64-BMI2-LABEL: oneuse64:
; X64-BMI2: # %bb.0:
; X64-BMI2-NEXT: pushq %r14
; X64-BMI2-NEXT: pushq %rbx
; X64-BMI2-NEXT: pushq %rax
; X64-BMI2-NEXT: movq %rdi, %r14
; X64-BMI2-NEXT: movq $-1, %rax
; X64-BMI2-NEXT: shlxq %rsi, %rax, %rbx
; X64-BMI2-NEXT: movq %rbx, %rdi
; X64-BMI2-NEXT: callq use64
; X64-BMI2-NEXT: andq %r14, %rbx
; X64-BMI2-NEXT: movq %rbx, %rax
; X64-BMI2-NEXT: addq $8, %rsp
; X64-BMI2-NEXT: popq %rbx
; X64-BMI2-NEXT: popq %r14
; X64-BMI2-NEXT: retq
%mask = shl i64 -1, %numlowbits
call void @use64(i64 %mask)
%masked = and i64 %mask, %val
ret i64 %masked
}
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