Move a sign-extend or a zero-extend of a load to the same basic block as the

load when the type of the load is not legal, even if truncates are not free.
The load is going to be legalized to an extending load anyway.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114488 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/CodeGenPrepare.cpp b/lib/Transforms/Scalar/CodeGenPrepare.cpp
index 0e05a26d243b860b87b9088591eb7d0bca81061b..526107c977092a7a932e56e94d396268b78cfdd0 100644 (file)
--- a/lib/Transforms/Scalar/CodeGenPrepare.cpp
+++ b/lib/Transforms/Scalar/CodeGenPrepare.cpp
@@ -772,7 +772,8 @@ bool CodeGenPrepare::MoveExtToFormExtLoad(Instruction *I) {
   // If the load has other users and the truncate is not free, this probably
   // isn't worthwhile.
   if (!LI->hasOneUse() &&
-      TLI && !TLI->isTruncateFree(I->getType(), LI->getType()))
+      TLI && TLI->isTypeLegal(TLI->getValueType(LI->getType())) &&
+      !TLI->isTruncateFree(I->getType(), LI->getType()))
     return false;
 
   // Check whether the target supports casts folded into loads.