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| author | Chris Lattner <sabre@nondot.org> | 2005-08-29 01:01:01 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-08-29 01:01:01 +0000 |
| commit | 2fef809b5b6a38d38aadc3399b5f7a78b537d092 (patch) | |
| tree | 74f1d3dec81329762ba533a87cd574b01c9e2bc4 | |
| parent | 2a06a5ef363382479e74cae2d39f139e11f40225 (diff) | |
A hack to fix a problem folding immedaites. This fixes Olden/power.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23126 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/PowerPC/PPCISelDAGToDAG.cpp | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp index 89f0f64223..2503e26e61 100644 --- a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp +++ b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp @@ -685,16 +685,20 @@ SDOperand PPC32DAGToDAGISel::Select(SDOperand Op) { unsigned v = (unsigned)cast<ConstantSDNode>(N)->getValue(); unsigned Hi = HA16(v); unsigned Lo = Lo16(v); + + // NOTE: This doesn't use SelectNodeTo, because doing that will prevent + // folding shared immediates into other the second instruction that + // uses it. if (Hi && Lo) { SDOperand Top = CurDAG->getTargetNode(PPC::LIS, MVT::i32, getI32Imm(v >> 16)); - CurDAG->SelectNodeTo(N, PPC::ORI, MVT::i32, Top, getI32Imm(v & 0xFFFF)); + return CurDAG->getTargetNode(PPC::ORI, MVT::i32, Top, + getI32Imm(v & 0xFFFF)); } else if (Lo) { - CurDAG->SelectNodeTo(N, PPC::LI, MVT::i32, getI32Imm(v)); + return CurDAG->getTargetNode(PPC::LI, MVT::i32, getI32Imm(v)); } else { - CurDAG->SelectNodeTo(N, PPC::LIS, MVT::i32, getI32Imm(v >> 16)); + return CurDAG->getTargetNode(PPC::LIS, MVT::i32, getI32Imm(v >> 16)); } - break; } case ISD::UNDEF: if (N->getValueType(0) == MVT::i32) |