1 ; RUN: opt -S -loop-unroll -codegenprepare < %s | FileCheck %s 2 3 target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64" 4 target triple = "armv7--linux-gnueabihf" 5 6 ; CHECK-LABEL: @f 7 define i32 @f(i32 %a) #0 { 8 ; CHECK: call i32 @llvm.bitreverse.i32 9 entry: 10 br label %for.body 11 12 for.cond.cleanup: ; preds = %for.body 13 ret i32 %or 14 15 for.body: ; preds = %for.body, %entry 16 %i.08 = phi i32 [ 0, %entry ], [ %inc, %for.body ] 17 %b.07 = phi i32 [ 0, %entry ], [ %or, %for.body ] 18 %shr = lshr i32 %a, %i.08 19 %and = and i32 %shr, 1 20 %sub = sub nuw nsw i32 31, %i.08 21 %shl = shl i32 %and, %sub 22 %or = or i32 %shl, %b.07 23 %inc = add nuw nsw i32 %i.08, 1 24 %exitcond = icmp eq i32 %inc, 32 25 br i1 %exitcond, label %for.cond.cleanup, label %for.body, !llvm.loop !3 26 } 27 28 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" } 29 30 !llvm.module.flags = !{!0, !1} 31 !llvm.ident = !{!2} 32 33 !0 = !{i32 1, !"wchar_size", i32 4} 34 !1 = !{i32 1, !"min_enum_size", i32 4} 35 !2 = !{!"clang version 3.8.0 (http://llvm.org/git/clang.git b7441a0f42c43a8eea9e3e706be187252db747fa)"} 36 !3 = distinct !{!3, !4} 37 !4 = !{!"llvm.loop.unroll.full"} 38
