15 lines
380 B
LLVM
15 lines
380 B
LLVM
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; RUN: llc -mtriple=arm-eabi -mattr=+v7 %s -o - | FileCheck %s
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define i32 @f(i32 %a) nounwind readnone optsize ssp {
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entry:
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%conv = zext i32 %a to i64
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%tmp1 = tail call i64 @llvm.ctlz.i64(i64 %conv, i1 true)
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; CHECK: clz
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; CHECK-NOT: adds
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%cast = trunc i64 %tmp1 to i32
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%sub = sub nsw i32 63, %cast
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ret i32 %sub
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}
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declare i64 @llvm.ctlz.i64(i64, i1) nounwind readnone
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