From ca578e7ba6b1e4ce955134e3fb1d5014942e5248 Mon Sep 17 00:00:00 2001 From: Tim Northover Date: Tue, 26 Jun 2012 18:46:28 +0000 Subject: 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 --- utils/TableGen/DAGISelMatcherGen.cpp | 7 +++++++ 1 file changed, 7 insertions(+) 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. -- cgit v1.2.3