derek.holloway
7502bf64a4
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20 lines
720 B
LLVM
20 lines
720 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=x86_64-unknown-linux-gnu %s -o - | FileCheck %s
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define i8 @_BitScanForward(ptr nocapture %Index, i32 %Mask) {
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; CHECK-LABEL: _BitScanForward:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: #APP
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; CHECK-NEXT: bsfl %esi, %ecx
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; CHECK-NEXT: #NO_APP
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; CHECK-NEXT: setne %al
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; CHECK-NEXT: movl %ecx, (%rdi)
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; CHECK-NEXT: retq
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entry:
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%0 = tail call { i8, i32 } asm "bsf$(l $2,$1 $| $1,$2$)", "={@ccnz},=r,r,~{dirflag},~{fpsr},~{flags}"(i32 %Mask)
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%asmresult = extractvalue { i8, i32 } %0, 0
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%asmresult1 = extractvalue { i8, i32 } %0, 1
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store i32 %asmresult1, ptr %Index, align 4
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ret i8 %asmresult
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}
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