CodeGenPrepare: Don't match addressing modes through addrspacecast
This was resulting in the addrspacecast being removed and incorrectly
replaced with a ptrtoint when sinking.
llvm-svn: 238217
diff --git a/llvm/lib/CodeGen/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp
index cf2b0a2..2c1858b 100644
--- a/llvm/lib/CodeGen/CodeGenPrepare.cpp
+++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp
@@ -2672,7 +2672,6 @@
return MatchAddr(AddrInst->getOperand(0), Depth);
return false;
case Instruction::BitCast:
- case Instruction::AddrSpaceCast:
// BitCast is always a noop, and we can handle it as long as it is
// int->int or pointer->pointer (we don't want int<->fp or something).
if ((AddrInst->getOperand(0)->getType()->isPointerTy() ||
@@ -2683,6 +2682,14 @@
AddrInst->getOperand(0)->getType() != AddrInst->getType())
return MatchAddr(AddrInst->getOperand(0), Depth);
return false;
+ case Instruction::AddrSpaceCast: {
+ unsigned SrcAS
+ = AddrInst->getOperand(0)->getType()->getPointerAddressSpace();
+ unsigned DestAS = AddrInst->getType()->getPointerAddressSpace();
+ if (TLI.isNoopAddrSpaceCast(SrcAS, DestAS))
+ return MatchAddr(AddrInst->getOperand(0), Depth);
+ return false;
+ }
case Instruction::Add: {
// Check to see if we can merge in the RHS then the LHS. If so, we win.
ExtAddrMode BackupAddrMode = AddrMode;