[mips] Add new error message and improve testing for parsing the .module directive.

Summary:
We used to silently ignore any empty .module's and we used to give an error saying that we found
an "unexpected token at start of statement" when the value of the option wasn't an identifier (e.g. if it was a number).

We now give an error saying that we "expected .module option identifier" in both of those cases.

I also fixed the other tests in mips-abi-bad.s, which all seemed to be broken.


Reviewers: dsanders

Reviewed By: dsanders

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D7095

llvm-svn: 226905

1 files changed, 27 insertions, 26 deletions

diff --git a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
index 77f312ed53e..3725f2f5df0 100644
--- a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
+++ b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
@@ -3723,43 +3723,44 @@ bool MipsAsmParser::parseDirectiveModule() {
     return false;
   }
 
-  if (Lexer.is(AsmToken::Identifier)) {
-    StringRef Option = Parser.getTok().getString();
-    Parser.Lex();
-
-    if (Option == "oddspreg") {
-      getTargetStreamer().emitDirectiveModuleOddSPReg(true, isABI_O32());
-      clearFeatureBits(Mips::FeatureNoOddSPReg, "nooddspreg");
+  StringRef Option;
+  if (Parser.parseIdentifier(Option)) {
+    reportParseError("expected .module option identifier");
+    return false;
+  }
 
-      if (getLexer().isNot(AsmToken::EndOfStatement)) {
-        reportParseError("unexpected token, expected end of statement");
-        return false;
-      }
+  if (Option == "oddspreg") {
+    getTargetStreamer().emitDirectiveModuleOddSPReg(true, isABI_O32());
+    clearFeatureBits(Mips::FeatureNoOddSPReg, "nooddspreg");
 
+    // If this is not the end of the statement, report an error.
+    if (getLexer().isNot(AsmToken::EndOfStatement)) {
+      reportParseError("unexpected token, expected end of statement");
       return false;
-    } else if (Option == "nooddspreg") {
-      if (!isABI_O32()) {
-        Error(L, "'.module nooddspreg' requires the O32 ABI");
-        return false;
-      }
+    }
 
-      getTargetStreamer().emitDirectiveModuleOddSPReg(false, isABI_O32());
-      setFeatureBits(Mips::FeatureNoOddSPReg, "nooddspreg");
+    return false; // parseDirectiveModule has finished successfully.
+  } else if (Option == "nooddspreg") {
+    if (!isABI_O32()) {
+      Error(L, "'.module nooddspreg' requires the O32 ABI");
+      return false;
+    }
 
-      if (getLexer().isNot(AsmToken::EndOfStatement)) {
-        reportParseError("unexpected token, expected end of statement");
-        return false;
-      }
+    getTargetStreamer().emitDirectiveModuleOddSPReg(false, isABI_O32());
+    setFeatureBits(Mips::FeatureNoOddSPReg, "nooddspreg");
 
+    // If this is not the end of the statement, report an error.
+    if (getLexer().isNot(AsmToken::EndOfStatement)) {
+      reportParseError("unexpected token, expected end of statement");
       return false;
-    } else if (Option == "fp") {
-      return parseDirectiveModuleFP();
     }
 
+    return false; // parseDirectiveModule has finished successfully.
+  } else if (Option == "fp") {
+    return parseDirectiveModuleFP();
+  } else {
     return Error(L, "'" + Twine(Option) + "' is not a valid .module option.");
   }
-
-  return false;
 }
 
 /// parseDirectiveModuleFP