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Testcase for critical edge splitting with load PRE.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96385 91177308-0d34-0410-b5e6-96231b3b80d8
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Bob Wilson 2010-02-16 20:48:55 +00:00
parent 39be8fcfdc
commit 713bc585ef
1 changed files with 27 additions and 0 deletions
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27
test/Transforms/GVN/pre-load.ll
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@ -362,3 +362,30 @@ bb:
return:
ret void
}
; Test critical edge splitting.
define i32 @test11(i32* %p, i1 %C, i32 %N) {
; CHECK: @test11
block1:
br i1 %C, label %block2, label %block3
block2:
%cond = icmp sgt i32 %N, 1
br i1 %cond, label %block4, label %block5
; CHECK: load i32* %p
; CHECK-NEXT: br label %block4
block3:
store i32 0, i32* %p
br label %block4
block4:
%PRE = load i32* %p
br label %block5
block5:
%ret = phi i32 [ 0, %block2 ], [ %PRE, %block4 ]
ret i32 %ret
; CHECK: block4:
; CHECK-NEXT: phi i32
}