From 1402f0b2cac017ab997f71ab4909a2ccfea7be4b Mon Sep 17 00:00:00 2001 From: Daniel Dunbar Date: Sat, 23 Jan 2010 00:26:16 +0000 Subject: [PATCH] AsmMatcher: Add a comment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94261 91177308-0d34-0410-b5e6-96231b3b80d8 --- utils/TableGen/AsmMatcherEmitter.cpp | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/utils/TableGen/AsmMatcherEmitter.cpp b/utils/TableGen/AsmMatcherEmitter.cpp index 019908bd599..8c37c3aabe0 100644 --- a/utils/TableGen/AsmMatcherEmitter.cpp +++ b/utils/TableGen/AsmMatcherEmitter.cpp @@ -465,6 +465,10 @@ struct InstructionInfo { if (Operands.size() != RHS.Operands.size()) return false; + // Otherwise, make sure the ordering of the two instructions is unambiguous + // by checking that either (a) a token or operand kind discriminates them, + // or (b) the ordering among equivalent kinds is consistent. + // Tokens and operand kinds are unambiguous (assuming a correct target // specific parser). for (unsigned i = 0, e = Operands.size(); i != e; ++i)