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When re-using an existing cast for a user, it's still necessary to call

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rememberInstruction so that future users of that user will be inserted
in the correct position. This fixes the Darwin selfhost.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94070 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-01-21 10:08:42 +00:00
parent 401f3258f6
commit c37e3d5d7c
1 changed files with 3 additions and 1 deletions
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4
lib/Analysis/ScalarEvolutionExpander.cpp
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@@ -98,14 +98,16 @@ Value *SCEVExpander::InsertNoopCastOfTo(Value *V, const Type *Ty) {
It = cast<InvokeInst>(I)->getNormalDest()->begin(); It = cast<InvokeInst>(I)->getNormalDest()->begin();
while (isa<PHINode>(It)) ++It; while (isa<PHINode>(It)) ++It;
if (It != BasicBlock::iterator(CI)) { if (It != BasicBlock::iterator(CI)) {
// Recreate the cast at the beginning of the entry block. // Recreate the cast after the user.
// The old cast is left in place in case it is being used // The old cast is left in place in case it is being used
// as an insert point. // as an insert point.
Instruction *NewCI = CastInst::Create(Op, V, Ty, "", It); Instruction *NewCI = CastInst::Create(Op, V, Ty, "", It);
NewCI->takeName(CI); NewCI->takeName(CI);
CI->replaceAllUsesWith(NewCI); CI->replaceAllUsesWith(NewCI);
rememberInstruction(NewCI);
return NewCI; return NewCI;
} }
rememberInstruction(CI);
return CI; return CI;
} }
} }