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

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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 064f6a1a3d
commit a22747a563
1 changed files with 2 additions and 1 deletions
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3
lib/Transforms/Scalar/CodeGenPrepare.cpp
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@ -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.