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Add a redundant PHI testcase for SSAUpdater to go with svn r100047.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100050 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson 2010-03-31 21:38:43 +00:00
parent a88cb38d02
commit 368454976c
1 changed files with 46 additions and 0 deletions
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46
test/Transforms/GVN/2010-03-31-RedundantPHIs.ll Normal file
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@ -0,0 +1,46 @@
; RUN: opt < %s -gvn -enable-full-load-pre -S | FileCheck %s
define i8* @cat(i8* %s1, ...) nounwind {
entry:
br i1 undef, label %bb, label %bb3
bb: ; preds = %entry
unreachable
bb3: ; preds = %entry
store i8* undef, i8** undef, align 4
br i1 undef, label %bb5, label %bb6
bb5: ; preds = %bb3
unreachable
bb6: ; preds = %bb3
br label %bb12
bb8: ; preds = %bb12
br i1 undef, label %bb9, label %bb10
bb9: ; preds = %bb8
%0 = load i8** undef, align 4 ; <i8*> [#uses=0]
%1 = load i8** undef, align 4 ; <i8*> [#uses=0]
br label %bb11
bb10: ; preds = %bb8
br label %bb11
bb11: ; preds = %bb10, %bb9
; CHECK: bb11:
; CHECK: phi
; CHECK-NOT: phi
br label %bb12
bb12: ; preds = %bb11, %bb6
; CHECK: bb12:
; CHECK: phi
; CHECK-NOT: phi
br i1 undef, label %bb8, label %bb13
bb13: ; preds = %bb12
; CHECK: bb13:
ret i8* undef
}