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fix a bug in r121680 that upset the various buildbots.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121687 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-12-13 05:34:18 +00:00
parent 979b8f1d8c
commit 97bd89ece3
2 changed files with 36 additions and 0 deletions
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7
lib/Transforms/Utils/SimplifyCFG.cpp
View File

@ -1899,6 +1899,13 @@ static bool SimplifyBranchOnICmpChain(BranchInst *BI, const TargetData *TD) {
BranchInst::Create(EdgeBB, NewBB, ExtraCase, OldTI);
OldTI->eraseFromParent();
// If there are PHI nodes in EdgeBB, then we need to add a new entry to them
// for the edge we just added.
for (BasicBlock::iterator I = EdgeBB->begin(); isa<PHINode>(I); ++I) {
PHINode *PN = cast<PHINode>(I);
PN->addIncoming(PN->getIncomingValueForBlock(NewBB), BB);
}
BB = NewBB;
}

29
test/Transforms/SimplifyCFG/switch_create.ll
View File

@ -176,3 +176,32 @@ if.end: ; preds = %entry
; CHECK: i8 97, label %if.then
; CHECK: ]
}
define i32 @test8(i8 zeroext %c, i32 %x, i1 %C) nounwind ssp noredzone {
entry:
br i1 %C, label %N, label %if.then
N:
%cmp = icmp ult i32 %x, 32
%cmp4 = icmp eq i8 %c, 97
%or.cond = or i1 %cmp, %cmp4
%cmp9 = icmp eq i8 %c, 99
%or.cond11 = or i1 %or.cond, %cmp9
br i1 %or.cond11, label %if.then, label %if.end
if.then: ; preds = %entry
%A = phi i32 [0, %entry], [42, %N]
tail call void @foo1() nounwind noredzone
ret i32 %A
if.end: ; preds = %entry
ret i32 0
; CHECK: @test8
; CHECK: switch.early.test:
; CHECK: switch i8 %c, label %if.end [
; CHECK: i8 99, label %if.then
; CHECK: i8 97, label %if.then
; CHECK: ]
; CHECK: %A = phi i32 [ 0, %entry ], [ 42, %switch.early.test ], [ 42, %N ], [ 42, %switch.early.test ]
}