Split AsmParser into two components - AsmParser and AsmParserVariant

AsmParser holds info specific to target parser.
AsmParserVariant holds info specific to asm variants supported by the target.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147787 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 13 insertions, 1 deletions

diff --git a/include/llvm/Target/Target.td b/include/llvm/Target/Target.td
index c9b6a8e..be08b9c 100644
--- a/include/llvm/Target/Target.td
+++ b/include/llvm/Target/Target.td
@@ -712,7 +712,15 @@ class AsmParser {
   // function of the AsmParser class to call on every matched instruction.
   // This can be used to perform target specific instruction post-processing.
   string AsmParserInstCleanup  = "";
+}
+def DefaultAsmParser : AsmParser;
 
+//===----------------------------------------------------------------------===//
+// AsmParserVariant - Subtargets can have multiple different assembly parsers 
+// (e.g. AT&T vs Intel syntax on X86 for example). This class can be
+// implemented by targets to describe such variants.
+//
+class AsmParserVariant {
   // Variant - AsmParsers can be of multiple different variants.  Variants are
   // used to support targets that need to parser multiple formats for the
   // assembly language.
@@ -729,7 +737,7 @@ class AsmParser {
   // purposes of matching.
   string RegisterPrefix = "";
 }
-def DefaultAsmParser : AsmParser;
+def DefaultAsmParserVariant : AsmParserVariant;
 
 /// AssemblerPredicate - This is a Predicate that can be used when the assembler
 /// matches instructions and aliases.
@@ -840,6 +848,10 @@ class Target {
   // AssemblyParsers - The AsmParser instances available for this target.
   list<AsmParser> AssemblyParsers = [DefaultAsmParser];
 
+  /// AssemblyParserVariants - The AsmParserVariant instances available for 
+  /// this target.
+  list<AsmParserVariant> AssemblyParserVariants = [DefaultAsmParserVariant];
+
   // AssemblyWriters - The AsmWriter instances available for this target.
   list<AsmWriter> AssemblyWriters = [DefaultAsmWriter];
 }