From aa4e3391c8814c6ce0bbc530ea4d5905414b2763 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Sun, 28 Mar 2010 05:50:16 +0000 Subject: add an optimized form of OPC_EmitMergeInputChains for the 1, 0 and 1, 1 cases which are by-far the most frequent. This shrinks the X86 isel table from 77014 -> 74657 bytes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99740 91177308-0d34-0410-b5e6-96231b3b80d8 --- utils/TableGen/DAGISelMatcherEmitter.cpp | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'utils/TableGen/DAGISelMatcherEmitter.cpp') diff --git a/utils/TableGen/DAGISelMatcherEmitter.cpp b/utils/TableGen/DAGISelMatcherEmitter.cpp index 8855034..25b7a2f 100644 --- a/utils/TableGen/DAGISelMatcherEmitter.cpp +++ b/utils/TableGen/DAGISelMatcherEmitter.cpp @@ -449,6 +449,13 @@ EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx, case Matcher::EmitMergeInputChains: { const EmitMergeInputChainsMatcher *MN = cast(N); + + // Handle the specialized forms OPC_EmitMergeInputChains1_0 and 1_1. + if (MN->getNumNodes() == 1 && MN->getNode(0) < 2) { + OS << "OPC_EmitMergeInputChains1_" << MN->getNode(0) << ",\n"; + return 1; + } + OS << "OPC_EmitMergeInputChains, " << MN->getNumNodes() << ", "; for (unsigned i = 0, e = MN->getNumNodes(); i != e; ++i) OS << MN->getNode(i) << ", "; -- cgit v1.1