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Fix another variant of PR 7191. Also add a testcase

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Mon Ping provided; unfortunately bugpoint failed to
reduce it, but I think it's important to have a test for
this in the suite.  8023512.

llvm-svn: 104624
This commit is contained in:
Dale Johannesen 2010-05-25 18:47:23 +00:00
parent 28018eed17
commit 8fd73c1910
2 changed files with 2723 additions and 1 deletions
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6
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -3832,8 +3832,12 @@ SDValue DAGCombiner::visitANY_EXTEND(SDNode *N) {
if (N0.getOpcode() == ISD::TRUNCATE) {
SDValue NarrowLoad = ReduceLoadWidth(N0.getNode());
if (NarrowLoad.getNode()) {
if (NarrowLoad.getNode() != N0.getNode())
SDNode* oye = N0.getNode()->getOperand(0).getNode();
if (NarrowLoad.getNode() != N0.getNode()) {
CombineTo(N0.getNode(), NarrowLoad);
// CombineTo deleted the truncate, if needed, but not what's under it.
AddToWorkList(oye);
}
return DAG.getNode(ISD::ANY_EXTEND, N->getDebugLoc(), VT, NarrowLoad);
}
}

2718
test/CodeGen/X86/2010-05-25-FP_TO_INT-crash.ll Normal file
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