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Handle getresult instructions in different basic blocks

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from their aggregate operands by moving the getresult
instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48657 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2008-03-21 21:01:32 +00:00
parent 35831d06fd
commit f1d3d666c1
2 changed files with 24 additions and 0 deletions
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9
lib/Transforms/Scalar/CodeGenPrepare.cpp
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@ -1127,6 +1127,15 @@ bool CodeGenPrepare::OptimizeBlock(BasicBlock &BB) {
// Sink address computing for memory operands into the block.
MadeChange |= OptimizeInlineAsmInst(I, &(*CI), SunkAddrs);
}
} else if (GetResultInst *GRI = dyn_cast<GetResultInst>(I)) {
// Ensure that all getresult instructions live in the same basic block
// as their associated struct-value instructions. Codegen requires
// this, as lowering only works on one basic block at a time.
if (Instruction *Agg = dyn_cast<Instruction>(GRI->getAggregateValue())) {
BasicBlock *AggBB = Agg->getParent();
if (AggBB != GRI->getParent())
GRI->moveBefore(AggBB->getTerminator());
}
}
}