153 lines
3.9 KiB
LLVM
153 lines
3.9 KiB
LLVM
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
||
|
|
; RUN: llc -mtriple=i686-unknown-linux-gnu < %s | FileCheck %s --check-prefix=X86
|
||
|
|
; RUN: llc -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s --check-prefix=X64
|
||
|
|
|
||
|
|
; Fold
|
||
|
|
; ptr - (ptr & C)
|
||
|
|
; To
|
||
|
|
; ptr & (~C)
|
||
|
|
;
|
||
|
|
; This needs to be a backend-level fold because only by now pointers
|
||
|
|
; are just registers; in middle-end IR this can only be done via @llvm.ptrmask()
|
||
|
|
; intrinsic which is not sufficiently widely-spread yet.
|
||
|
|
;
|
||
|
|
; https://bugs.llvm.org/show_bug.cgi?id=44448
|
||
|
|
|
||
|
|
; The basic positive tests
|
||
|
|
|
||
|
|
define i32 @t0_32(i32 %ptr) nounwind {
|
||
|
|
; X86-LABEL: t0_32:
|
||
|
|
; X86: # %bb.0:
|
||
|
|
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
|
||
|
|
; X86-NEXT: andl $-16, %eax
|
||
|
|
; X86-NEXT: retl
|
||
|
|
;
|
||
|
|
; X64-LABEL: t0_32:
|
||
|
|
; X64: # %bb.0:
|
||
|
|
; X64-NEXT: movl %edi, %eax
|
||
|
|
; X64-NEXT: andl $-16, %eax
|
||
|
|
; X64-NEXT: retq
|
||
|
|
%bias = and i32 %ptr, 15
|
||
|
|
%r = sub i32 %ptr, %bias
|
||
|
|
ret i32 %r
|
||
|
|
}
|
||
|
|
define i64 @t1_64(i64 %ptr) nounwind {
|
||
|
|
; X86-LABEL: t1_64:
|
||
|
|
; X86: # %bb.0:
|
||
|
|
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
|
||
|
|
; X86-NEXT: movl {{[0-9]+}}(%esp), %edx
|
||
|
|
; X86-NEXT: andl $-16, %eax
|
||
|
|
; X86-NEXT: retl
|
||
|
|
;
|
||
|
|
; X64-LABEL: t1_64:
|
||
|
|
; X64: # %bb.0:
|
||
|
|
; X64-NEXT: movq %rdi, %rax
|
||
|
|
; X64-NEXT: andq $-16, %rax
|
||
|
|
; X64-NEXT: retq
|
||
|
|
%bias = and i64 %ptr, 15
|
||
|
|
%r = sub i64 %ptr, %bias
|
||
|
|
ret i64 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @t2_powerof2(i32 %ptr) nounwind {
|
||
|
|
; X86-LABEL: t2_powerof2:
|
||
|
|
; X86: # %bb.0:
|
||
|
|
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
|
||
|
|
; X86-NEXT: andl $-17, %eax
|
||
|
|
; X86-NEXT: retl
|
||
|
|
;
|
||
|
|
; X64-LABEL: t2_powerof2:
|
||
|
|
; X64: # %bb.0:
|
||
|
|
; X64-NEXT: movl %edi, %eax
|
||
|
|
; X64-NEXT: andl $-17, %eax
|
||
|
|
; X64-NEXT: retq
|
||
|
|
%bias = and i32 %ptr, 16
|
||
|
|
%r = sub i32 %ptr, %bias
|
||
|
|
ret i32 %r
|
||
|
|
}
|
||
|
|
define i32 @t3_random_constant(i32 %ptr) nounwind {
|
||
|
|
; X86-LABEL: t3_random_constant:
|
||
|
|
; X86: # %bb.0:
|
||
|
|
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
|
||
|
|
; X86-NEXT: andl $-43, %eax
|
||
|
|
; X86-NEXT: retl
|
||
|
|
;
|
||
|
|
; X64-LABEL: t3_random_constant:
|
||
|
|
; X64: # %bb.0:
|
||
|
|
; X64-NEXT: movl %edi, %eax
|
||
|
|
; X64-NEXT: andl $-43, %eax
|
||
|
|
; X64-NEXT: retq
|
||
|
|
%bias = and i32 %ptr, 42
|
||
|
|
%r = sub i32 %ptr, %bias
|
||
|
|
ret i32 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
; Extra use tests
|
||
|
|
|
||
|
|
define i32 @t4_extrause(i32 %ptr, i32* %bias_storage) nounwind {
|
||
|
|
; X86-LABEL: t4_extrause:
|
||
|
|
; X86: # %bb.0:
|
||
|
|
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
|
||
|
|
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
|
||
|
|
; X86-NEXT: movl %eax, %edx
|
||
|
|
; X86-NEXT: andl $15, %edx
|
||
|
|
; X86-NEXT: movl %edx, (%ecx)
|
||
|
|
; X86-NEXT: andl $-16, %eax
|
||
|
|
; X86-NEXT: retl
|
||
|
|
;
|
||
|
|
; X64-LABEL: t4_extrause:
|
||
|
|
; X64: # %bb.0:
|
||
|
|
; X64-NEXT: movl %edi, %eax
|
||
|
|
; X64-NEXT: movl %edi, %ecx
|
||
|
|
; X64-NEXT: andl $15, %ecx
|
||
|
|
; X64-NEXT: movl %ecx, (%rsi)
|
||
|
|
; X64-NEXT: andl $-16, %eax
|
||
|
|
; X64-NEXT: retq
|
||
|
|
%bias = and i32 %ptr, 15
|
||
|
|
store i32 %bias, i32* %bias_storage
|
||
|
|
%r = sub i32 %ptr, %bias
|
||
|
|
ret i32 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
; Negative tests
|
||
|
|
|
||
|
|
define i32 @n5_different_ptrs(i32 %ptr0, i32 %ptr1) nounwind {
|
||
|
|
; X86-LABEL: n5_different_ptrs:
|
||
|
|
; X86: # %bb.0:
|
||
|
|
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
|
||
|
|
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
|
||
|
|
; X86-NEXT: andl $15, %ecx
|
||
|
|
; X86-NEXT: subl %ecx, %eax
|
||
|
|
; X86-NEXT: retl
|
||
|
|
;
|
||
|
|
; X64-LABEL: n5_different_ptrs:
|
||
|
|
; X64: # %bb.0:
|
||
|
|
; X64-NEXT: movl %edi, %eax
|
||
|
|
; X64-NEXT: andl $15, %esi
|
||
|
|
; X64-NEXT: subl %esi, %eax
|
||
|
|
; X64-NEXT: retq
|
||
|
|
%bias = and i32 %ptr1, 15 ; not %ptr0
|
||
|
|
%r = sub i32 %ptr0, %bias ; not %ptr1
|
||
|
|
ret i32 %r
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @n6_sub_is_not_commutative(i32 %ptr) nounwind {
|
||
|
|
; X86-LABEL: n6_sub_is_not_commutative:
|
||
|
|
; X86: # %bb.0:
|
||
|
|
; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
|
||
|
|
; X86-NEXT: movl %ecx, %eax
|
||
|
|
; X86-NEXT: andl $15, %eax
|
||
|
|
; X86-NEXT: subl %ecx, %eax
|
||
|
|
; X86-NEXT: retl
|
||
|
|
;
|
||
|
|
; X64-LABEL: n6_sub_is_not_commutative:
|
||
|
|
; X64: # %bb.0:
|
||
|
|
; X64-NEXT: movl %edi, %eax
|
||
|
|
; X64-NEXT: andl $15, %eax
|
||
|
|
; X64-NEXT: subl %edi, %eax
|
||
|
|
; X64-NEXT: retq
|
||
|
|
%bias = and i32 %ptr, 15
|
||
|
|
%r = sub i32 %bias, %ptr ; wrong order
|
||
|
|
ret i32 %r
|
||
|
|
}
|