fix PR6512, a case where instcombine would incorrectly merge loads
from different addr spaces.
llvm-svn: 97813
diff --git a/llvm/lib/Transforms/InstCombine/InstCombinePHI.cpp b/llvm/lib/Transforms/InstCombine/InstCombinePHI.cpp
index fba83542..65f0393 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombinePHI.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombinePHI.cpp
@@ -266,6 +266,7 @@
// and if TD isn't around, we can't handle the mixed case.
bool isVolatile = FirstLI->isVolatile();
unsigned LoadAlignment = FirstLI->getAlignment();
+ unsigned LoadAddrSpace = FirstLI->getPointerAddressSpace();
// We can't sink the load if the loaded value could be modified between the
// load and the PHI.
@@ -290,6 +291,7 @@
// the load and the PHI.
if (LI->isVolatile() != isVolatile ||
LI->getParent() != PN.getIncomingBlock(i) ||
+ LI->getPointerAddressSpace() != LoadAddrSpace ||
!isSafeAndProfitableToSinkLoad(LI))
return 0;