52 lines
1.1 KiB
LLVM
52 lines
1.1 KiB
LLVM
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; RUN: llc < %s | FileCheck %s
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; RUN: llc -relocation-model=pic < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@bit_mask8 = external hidden global i8, !absolute_symbol !0
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@bit_mask32 = external hidden global i8, !absolute_symbol !1
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@bit_mask64 = external hidden global i8, !absolute_symbol !2
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declare void @f()
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define void @foo32(i32* %ptr) {
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%load = load i32, i32* %ptr
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%and = and i32 %load, 31
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%shl = shl i32 1, %and
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%and2 = and i32 %shl, ptrtoint (i8* @bit_mask32 to i32)
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; CHECK: movl $bit_mask32, %eax
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; CHECK: btl %ecx, %eax
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%icmp = icmp eq i32 %and2, 0
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br i1 %icmp, label %t, label %f
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t:
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call void @f()
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ret void
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f:
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ret void
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}
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define void @foo64(i64* %ptr) {
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%load = load i64, i64* %ptr
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%and = and i64 %load, 63
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%shl = shl i64 1, %and
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%and2 = and i64 %shl, ptrtoint (i8* @bit_mask64 to i64)
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; CHECK: movabsq $bit_mask64, %rax
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; CHECK: btq %rcx, %rax
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%icmp = icmp eq i64 %and2, 0
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br i1 %icmp, label %t, label %f
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t:
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call void @f()
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ret void
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f:
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ret void
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}
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!0 = !{i64 0, i64 256}
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!1 = !{i64 0, i64 4294967296}
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!2 = !{i64 -1, i64 -1}
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