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Do not crash when joining two intervals of registers of different

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classes: just ignore that move. Thanks to Vladimir Prus who found the
bug!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14644 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alkis Evlogimenos 2004-07-06 16:03:21 +00:00
parent e9c6551fed
commit 5de868b0b2
1 changed files with 10 additions and 1 deletions
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11
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -502,7 +502,9 @@ void LiveIntervals::joinIntervals()
const TargetRegisterClass *rcA, *rcB;
rcA = mf_->getSSARegMap()->getRegClass(intA->reg);
rcB = mf_->getSSARegMap()->getRegClass(intB->reg);
assert(rcA == rcB && "registers must be of the same class");
// if they are not of the same register class we continue
if (rcA != rcB)
continue;
// if their intervals do not overlap we join them
if (!intB->overlaps(*intA)) {
@ -524,6 +526,13 @@ void LiveIntervals::joinIntervals()
MRegisterInfo::isVirtualRegister(intB->reg) &&
"A must be physical and B must be virtual");
const TargetRegisterClass *rcA, *rcB;
rcA = mri_->getRegClass(intA->reg);
rcB = mf_->getSSARegMap()->getRegClass(intB->reg);
// if they are not of the same register class we continue
if (rcA != rcB)
continue;
if (!intA->overlaps(*intB) &&
!overlapsAliases(*intA, *intB)) {
intA->join(*intB);