Do not crash when joining two intervals of registers of different
classes: just ignore that move. Thanks to Vladimir Prus who found the
bug!
llvm-svn: 14644
diff --git a/llvm/lib/CodeGen/LiveIntervals.cpp b/llvm/lib/CodeGen/LiveIntervals.cpp
index 9c10805..2347c6b 100644
--- a/llvm/lib/CodeGen/LiveIntervals.cpp
+++ b/llvm/lib/CodeGen/LiveIntervals.cpp
@@ -502,7 +502,9 @@
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 @@
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);