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03d47320aa
In the simple and triangle if-conversion cases, when CopyAndPredicateBlock is used because the to-be-predicated block has other predecessors, we need to explicitly remove the old copied block from the successors list. Normally if conversion relies on TII->AnalyzeBranch combined with BB->CorrectExtraCFGEdges to cleanup the successors list, but if the predicated block contained an un-analyzable branch (such as a now-predicated return), then this will fail. These extra successors were causing a problem on PPC because it was causing later passes (such as PPCEarlyReturm) to leave dead return-only basic blocks in the code. llvm-svn: 179227
26 lines
876 B
LLVM
26 lines
876 B
LLVM
; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 | FileCheck %s
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target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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define void @_Z8example3iPiS_() #0 {
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entry:
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br i1 undef, label %while.end, label %while.body.lr.ph
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while.body.lr.ph: ; preds = %entry
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br i1 undef, label %while.end, label %while.body
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while.body: ; preds = %while.body, %while.body.lr.ph
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br i1 false, label %while.end, label %while.body, !llvm.vectorizer.already_vectorized !0
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while.end: ; preds = %while.body, %while.body.lr.ph, %entry
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ret void
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; CHECK: @_Z8example3iPiS_
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; CHECK: bnelr
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}
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attributes #0 = { noinline nounwind }
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!0 = metadata !{}
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