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.

llvm-svn: 114488
This commit is contained in:
Bob Wilson 2010-09-21 21:54:27 +00:00
parent ff714f9992
commit 4ddcb6a6b4
1 changed files with 2 additions and 1 deletions

View File

@ -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.