From 59fc42debd571bbafc52c20bc418fdc3f4d00188 Mon Sep 17 00:00:00 2001
From: Daniel Dunbar <daniel@zuster.org>
Date: Tue, 11 Aug 2009 20:59:47 +0000
Subject: llvm-mc/AsmParser: Allow target to specific a comment delimiter,
 which will be used to strip hard coded comments out of .td assembly strings.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78716 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/TableGen/AsmMatcherEmitter.cpp | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

(limited to 'utils')

diff --git a/utils/TableGen/AsmMatcherEmitter.cpp b/utils/TableGen/AsmMatcherEmitter.cpp
index 57b93b1d27..4dbd24c70d 100644
--- a/utils/TableGen/AsmMatcherEmitter.cpp
+++ b/utils/TableGen/AsmMatcherEmitter.cpp
@@ -501,6 +501,15 @@ public:
 
 class AsmMatcherInfo {
 public:
+  /// The tablegen AsmParser record.
+  Record *AsmParser;
+
+  /// The AsmParser "CommentDelimiter" value.
+  std::string CommentDelimiter;
+
+  /// The AsmParser "RegisterPrefix" value.
+  std::string RegisterPrefix;
+
   /// The classes which are needed for matching.
   std::vector<ClassInfo*> Classes;
   
@@ -537,6 +546,8 @@ private:
   void BuildOperandClasses(CodeGenTarget &Target);
 
 public:
+  AsmMatcherInfo(Record *_AsmParser);
+
   /// BuildInfo - Construct the various tables used during matching.
   void BuildInfo(CodeGenTarget &Target);
 };
@@ -778,6 +789,13 @@ void AsmMatcherInfo::BuildOperandClasses(CodeGenTarget &Target) {
   }
 }
 
+AsmMatcherInfo::AsmMatcherInfo(Record *_AsmParser) 
+  : AsmParser(_AsmParser),
+    CommentDelimiter(AsmParser->getValueAsString("CommentDelimiter")),
+    RegisterPrefix(AsmParser->getValueAsString("RegisterPrefix"))
+{
+}
+
 void AsmMatcherInfo::BuildInfo(CodeGenTarget &Target) {
   // Build info for the register classes.
   BuildRegisterClasses(Target);
@@ -801,6 +819,13 @@ void AsmMatcherInfo::BuildInfo(CodeGenTarget &Target) {
     II->Instr = &it->second;
     II->AsmString = FlattenVariants(CGI.AsmString, 0);
 
+    // Remove comments from the asm string.
+    if (!CommentDelimiter.empty()) {
+      size_t Idx = StringRef(II->AsmString).find(CommentDelimiter);
+      if (Idx != StringRef::npos)
+        II->AsmString = II->AsmString.substr(0, Idx);
+    }
+
     TokenizeAsmString(II->AsmString, II->Tokens);
 
     // Ignore instructions which shouldn't be matched.
@@ -1309,7 +1334,7 @@ void AsmMatcherEmitter::run(raw_ostream &OS) {
   EmitMatchRegisterName(Target, AsmParser, OS);
 
   // Compute the information on the instructions to match.
-  AsmMatcherInfo Info;
+  AsmMatcherInfo Info(AsmParser);
   Info.BuildInfo(Target);
 
   // Sort the instruction table using the partial order on classes.
-- 
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