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| author | David Majnemer <david.majnemer@gmail.com> | 2015-03-05 18:50:12 +0000 |
|---|---|---|
| committer | David Majnemer <david.majnemer@gmail.com> | 2015-03-05 18:50:12 +0000 |
| commit | 71b9b6be1bca11f35172b8bef128ca76959dfd08 (patch) | |
| tree | 99beafcedfac89ed43fd975023dfd0fceeff84e9 /llvm/lib/Target/X86/X86ISelDAGToDAG.cpp | |
| parent | caf7444b801133f8615491aadb28dc508a15ef3d (diff) | |
| download | bcm5719-llvm-71b9b6be1bca11f35172b8bef128ca76959dfd08.tar.gz bcm5719-llvm-71b9b6be1bca11f35172b8bef128ca76959dfd08.zip | |
X86: Optimize address mode matching for FRAME_ALLOC_RECOVER nodes
We know that the absolute symbol will be less than 2GB and thus will
always fit.
llvm-svn: 231389
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelDAGToDAG.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelDAGToDAG.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp index 8d50ae1584e..42715562a7c 100644 --- a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp +++ b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp @@ -1004,6 +1004,15 @@ bool X86DAGToDAGISel::MatchAddressRecursively(SDValue N, X86ISelAddressMode &AM, switch (N.getOpcode()) { default: break; + case ISD::FRAME_ALLOC_RECOVER: { + if (!AM.hasSymbolicDisplacement()) + if (const auto *ESNode = dyn_cast<ExternalSymbolSDNode>(N.getOperand(0))) + if (ESNode->getOpcode() == ISD::TargetExternalSymbol) { + AM.ES = ESNode->getSymbol(); + return false; + } + break; + } case ISD::Constant: { uint64_t Val = cast<ConstantSDNode>(N)->getSExtValue(); if (!FoldOffsetIntoAddress(Val, AM)) |
