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| author | Tim Northover <Tim.Northover@arm.com> | 2012-06-26 18:46:28 +0000 |
|---|---|---|
| committer | Tim Northover <Tim.Northover@arm.com> | 2012-06-26 18:46:28 +0000 |
| commit | ca578e7ba6b1e4ce955134e3fb1d5014942e5248 (patch) | |
| tree | c14b547a238fe8ba65c1f36da3d605c8e773a9d4 | |
| parent | da72dd2a01a9f3e686699d01f4d40b936a52eab6 (diff) | |
| download | llvm-ca578e7ba6b1e4ce955134e3fb1d5014942e5248.tar.gz llvm-ca578e7ba6b1e4ce955134e3fb1d5014942e5248.tar.bz2 llvm-ca578e7ba6b1e4ce955134e3fb1d5014942e5248.tar.xz | |
Teach TableGen to put chains on more instructions
When generating selection tables for Pat instances, TableGen relied on
an output Instruction's Pattern field being set to infer whether a
chain should be added.
This patch adds additional logic to check various flag fields so that
correct code can be generated even if Pattern is unset.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159217 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | utils/TableGen/DAGISelMatcherGen.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/utils/TableGen/DAGISelMatcherGen.cpp b/utils/TableGen/DAGISelMatcherGen.cpp index 2ac7b87e70..aed222c094 100644 --- a/utils/TableGen/DAGISelMatcherGen.cpp +++ b/utils/TableGen/DAGISelMatcherGen.cpp @@ -690,6 +690,13 @@ EmitResultInstructionAsOperand(const TreePatternNode *N, bool NodeHasChain = InstPatNode && InstPatNode->TreeHasProperty(SDNPHasChain, CGP); + // Instructions which load and store from memory should have a chain, + // regardless of whether they happen to have an internal pattern saying so. + if (Pattern.getSrcPattern()->TreeHasProperty(SDNPHasChain, CGP) + && (II.hasCtrlDep || II.mayLoad || II.mayStore || II.canFoldAsLoad || + II.hasSideEffects)) + NodeHasChain = true; + bool isRoot = N == Pattern.getDstPattern(); // TreeHasOutGlue - True if this tree has glue. |