Sparc: Add the "alternate address space" load/store instructions.

- Adds support for the asm syntax, which has an immediate integer
  "ASI" (address space identifier) appearing after an address, before
  a comma.

- Adds the various-width load, store, and swap in alternate address
  space instructions. (ldsba, ldsha, lduba, lduha, lda, stba, stha,
  sta, swapa)

This does not attempt to hook these instructions up to pointer address
spaces in LLVM, although that would probably be a reasonable thing to
do in the future.

Differential Revision: http://reviews.llvm.org/D8904

llvm-svn: 237581

1 files changed, 9 insertions, 0 deletions

diff --git a/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp b/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp
index de106679430..84cb440e742 100644
--- a/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp
+++ b/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp
@@ -631,6 +631,15 @@ SparcAsmParser::parseOperand(OperandVector &Operands, StringRef Mnemonic) {
     Operands.push_back(SparcOperand::CreateToken("]",
                                                  Parser.getTok().getLoc()));
     Parser.Lex(); // Eat the ]
+
+    // Parse an optional address-space identifier after the address.
+    if (getLexer().is(AsmToken::Integer)) {
+      std::unique_ptr<SparcOperand> Op;
+      ResTy = parseSparcAsmOperand(Op, false);
+      if (ResTy != MatchOperand_Success || !Op)
+        return MatchOperand_ParseFail;
+      Operands.push_back(std::move(Op));
+    }
     return MatchOperand_Success;
   }