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after finding the (unique) layout predecessor. Sometimes a block may be listed more than once, and processing it more than once in this loop can lead to inconsistent values for FtTBB/FtFBB, since the AnalyzeBranch method does not clear these values. There's no point in continuing the loop regardless. The testcase for this is reduced from the 2003-05-02-DependentPHI SingleSource test. llvm-svn: 71536
31 lines
1.1 KiB
LLVM
31 lines
1.1 KiB
LLVM
; RUN: llvm-as < %s | llc -march=arm
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%struct.List = type { %struct.List*, i32 }
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@Node5 = external constant %struct.List ; <%struct.List*> [#uses=1]
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@"\01LC" = external constant [7 x i8] ; <[7 x i8]*> [#uses=1]
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define i32 @main() nounwind {
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entry:
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br label %bb
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bb: ; preds = %bb3, %entry
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%CurL.02 = phi %struct.List* [ @Node5, %entry ], [ %2, %bb3 ] ; <%struct.List*> [#uses=1]
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%PrevL.01 = phi %struct.List* [ null, %entry ], [ %CurL.02, %bb3 ] ; <%struct.List*> [#uses=1]
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%0 = icmp eq %struct.List* %PrevL.01, null ; <i1> [#uses=1]
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br i1 %0, label %bb3, label %bb1
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bb1: ; preds = %bb
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br label %bb3
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bb3: ; preds = %bb1, %bb
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%iftmp.0.0 = phi i32 [ 0, %bb1 ], [ -1, %bb ] ; <i32> [#uses=1]
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%1 = tail call i32 (i8*, ...)* @printf(i8* getelementptr ([7 x i8]* @"\01LC", i32 0, i32 0), i32 0, i32 %iftmp.0.0) nounwind ; <i32> [#uses=0]
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%2 = load %struct.List** null, align 4 ; <%struct.List*> [#uses=2]
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%phitmp = icmp eq %struct.List* %2, null ; <i1> [#uses=1]
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br i1 %phitmp, label %bb5, label %bb
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bb5: ; preds = %bb3
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ret i32 0
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}
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declare i32 @printf(i8* nocapture, ...) nounwind
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