TTI: Improve default costs for addrspacecast

For some reason multiple places need to do this, and the variant the
loop unroller and inliner use was not handling it.

Also, introduce a new wrapper to be slightly more precise, since on
AMDGPU some addrspacecasts are free, but not no-ops.

llvm-svn: 362436

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp
index 488cfe6b6c8..797064b68c7 100644
--- a/llvm/lib/CodeGen/CodeGenPrepare.cpp
+++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp
@@ -1140,8 +1140,8 @@ static bool OptimizeNoopCopyExpression(CastInst *CI, const TargetLowering &TLI,
   // Sink only "cheap" (or nop) address-space casts.  This is a weaker condition
   // than sinking only nop casts, but is helpful on some platforms.
   if (auto *ASC = dyn_cast<AddrSpaceCastInst>(CI)) {
-    if (!TLI.isCheapAddrSpaceCast(ASC->getSrcAddressSpace(),
-                                  ASC->getDestAddressSpace()))
+    if (!TLI.isFreeAddrSpaceCast(ASC->getSrcAddressSpace(),
+                                 ASC->getDestAddressSpace()))
       return false;
   }