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Disable load width reduction xform of variant (zext (truncate load x)) for

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big endian targets until llvm-gcc build issue has been resolved.

llvm-svn: 35449
This commit is contained in:
Evan Cheng 2007-03-29 07:56:46 +00:00
parent 8f592160c0
commit ccee35fd0d
1 changed files with 3 additions and 1 deletions
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4
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -2110,7 +2110,9 @@ SDOperand DAGCombiner::visitZERO_EXTEND(SDNode *N) {
// fold (zext (truncate (load x))) -> (zext (smaller load x)) // fold (zext (truncate (load x))) -> (zext (smaller load x))
// fold (zext (truncate (srl (load x), c))) -> (zext (small load (x+c/n))) // fold (zext (truncate (srl (load x), c))) -> (zext (small load (x+c/n)))
if (N0.getOpcode() == ISD::TRUNCATE) { // FIXME: Temporarily disable this for big endian machines until llvm-gcc
// build issue has been resolved.
if (TLI.isLittleEndian() && N0.getOpcode() == ISD::TRUNCATE) {
SDOperand NarrowLoad = ReduceLoadWidth(N0.Val); SDOperand NarrowLoad = ReduceLoadWidth(N0.Val);
if (NarrowLoad.Val) { if (NarrowLoad.Val) {
if (NarrowLoad.Val != N0.Val) if (NarrowLoad.Val != N0.Val)