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| author | Chris Lattner <sabre@nondot.org> | 2007-12-29 06:55:23 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2007-12-29 06:55:23 +0000 |
| commit | 5919b48fe92b8addd0057bac9a4482952271971e (patch) | |
| tree | e9c0c59a820f6cacb1f507c61afb9e43e9474bd3 | |
| parent | 8013bd339b571ce36e2f8f20e40411b3c19446f8 (diff) | |
| download | bcm5719-llvm-5919b48fe92b8addd0057bac9a4482952271971e.tar.gz bcm5719-llvm-5919b48fe92b8addd0057bac9a4482952271971e.zip | |
don't fold fp_round(fp_extend(load)) -> fp_round(extload)
llvm-svn: 45400
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 242fffd1802..0ee45575633 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -3672,6 +3672,10 @@ SDOperand DAGCombiner::visitFP_EXTEND(SDNode *N) { ConstantFPSDNode *N0CFP = dyn_cast<ConstantFPSDNode>(N0); MVT::ValueType VT = N->getValueType(0); + // If this is fp_round(fpextend), don't fold it, allow ourselves to be folded. + if (N->hasOneUse() && (*N->use_begin())->getOpcode() == ISD::FP_ROUND) + return SDOperand(); + // fold (fp_extend c1fp) -> c1fp if (N0CFP && VT != MVT::ppcf128) return DAG.getNode(ISD::FP_EXTEND, VT, N0); |
