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38 lines
1.5 KiB
38 lines
1.5 KiB
; RUN: opt -S -loop-unroll -codegenprepare < %s | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "armv7--linux-gnueabihf"
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; CHECK-LABEL: @f
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define i32 @f(i32 %a) #0 {
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; CHECK: call i32 @llvm.bitreverse.i32
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entry:
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret i32 %or
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for.body: ; preds = %for.body, %entry
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%i.08 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%b.07 = phi i32 [ 0, %entry ], [ %or, %for.body ]
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%shr = lshr i32 %a, %i.08
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%and = and i32 %shr, 1
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%sub = sub nuw nsw i32 31, %i.08
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%shl = shl i32 %and, %sub
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%or = or i32 %shl, %b.07
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%inc = add nuw nsw i32 %i.08, 1
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%exitcond = icmp eq i32 %inc, 32
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br i1 %exitcond, label %for.cond.cleanup, label %for.body, !llvm.loop !3
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}
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attributes #0 = { norecurse nounwind readnone "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="cortex-a8" "target-features"="+dsp,+neon,+vfp3" "unsafe-fp-math"="false" "use-soft-float"="false" }
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!llvm.module.flags = !{!0, !1}
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!llvm.ident = !{!2}
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!0 = !{i32 1, !"wchar_size", i32 4}
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!1 = !{i32 1, !"min_enum_size", i32 4}
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!2 = !{!"clang version 3.8.0 (http://llvm.org/git/clang.git b7441a0f42c43a8eea9e3e706be187252db747fa)"}
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!3 = distinct !{!3, !4}
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!4 = !{!"llvm.loop.unroll.full"}
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