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Keep CodeGenPrepare from preserving the domtree.
CGP modifies the domtree in some cases, so saying that it preserves the domtree is a lie. We'll be able to selectively preserve it with the new pass manager. Differential Revision: http://reviews.llvm.org/D16893 llvm-svn: 264099
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; RUN: opt -S -loop-unroll -codegenprepare < %s -domtree -analyze | FileCheck %s | ||
; | ||
; Checks that the dom tree is properly invalidated after an operation that will | ||
; invalidate it in CodeGenPrepare. If the domtree isn't properly invalidated, | ||
; this will likely segfault, or print badref. | ||
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; CHECK-NOT: <badref> | ||
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64" | ||
target triple = "armv7--linux-gnueabihf" | ||
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define i32 @f(i32 %a) #0 { | ||
entry: | ||
br label %for.body | ||
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for.cond.cleanup: | ||
ret i32 %or | ||
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for.body: | ||
%i.08 = phi i32 [ 0, %entry ], [ %inc, %for.body ] | ||
%b.07 = phi i32 [ 0, %entry ], [ %or, %for.body ] | ||
%shr = lshr i32 %a, %i.08 | ||
%and = and i32 %shr, 1 | ||
%sub = sub nuw nsw i32 31, %i.08 | ||
%shl = shl i32 %and, %sub | ||
%or = or i32 %shl, %b.07 | ||
%inc = add nuw nsw i32 %i.08, 1 | ||
%exitcond = icmp eq i32 %inc, 32 | ||
br i1 %exitcond, label %for.cond.cleanup, label %for.body, !llvm.loop !3 | ||
} | ||
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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} | ||
!llvm.ident = !{!2} | ||
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!0 = !{i32 1, !"wchar_size", i32 4} | ||
!1 = !{i32 1, !"min_enum_size", i32 4} | ||
!2 = !{!"clang version 3.8.0 (http://llvm.org/git/clang.git b7441a0f42c43a8eea9e3e706be187252db747fa)"} | ||
!3 = distinct !{!3, !4} | ||
!4 = !{!"llvm.loop.unroll.full"} |