From dd9e510da7c6d4e9fe3866bae88b5e50e436db9b Mon Sep 17 00:00:00 2001
From: Matheus Almeida <matheus.almeida@imgtec.com>
Date: Wed, 18 Jun 2014 13:08:59 +0000
Subject: [PATCH] [mips] Remove the last usage of parseRegister from
 MipsAsmParser.

Summary:
Added negative test case so that we can be sure we handle erroneous situations
while parsing the .cpsetup directive.

Reviewers: dsanders

Reviewed By: dsanders

Differential Revision: http://reviews.llvm.org/D3681

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211160 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/Mips/AsmParser/MipsAsmParser.cpp | 62 +++++++++++----------
 test/MC/Mips/cpsetup-bad.s                  | 14 +++++
 2 files changed, 47 insertions(+), 29 deletions(-)
 create mode 100644 test/MC/Mips/cpsetup-bad.s

diff --git a/lib/Target/Mips/AsmParser/MipsAsmParser.cpp b/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
index 3133a51b3f9..1c1a8265dee 100644
--- a/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
+++ b/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
@@ -183,8 +183,6 @@ class MipsAsmParser : public MCTargetAsmParser {
     return STI.getFeatureBits() & Mips::FeatureMips64r6;
   }
 
-  bool parseRegister(unsigned &RegNum);
-
   bool eatComma(StringRef ErrorStr);
 
   int matchCPURegisterName(StringRef Symbol);
@@ -2342,25 +2340,6 @@ bool MipsAsmParser::parseSetFeature(uint64_t Feature) {
   return false;
 }
 
-bool MipsAsmParser::parseRegister(unsigned &RegNum) {
-  if (!getLexer().is(AsmToken::Dollar))
-    return false;
-
-  Parser.Lex();
-
-  const AsmToken &Reg = Parser.getTok();
-  if (Reg.is(AsmToken::Identifier)) {
-    RegNum = matchCPURegisterName(Reg.getIdentifier());
-  } else if (Reg.is(AsmToken::Integer)) {
-    RegNum = Reg.getIntVal();
-  } else {
-    return false;
-  }
-
-  Parser.Lex();
-  return true;
-}
-
 bool MipsAsmParser::eatComma(StringRef ErrorStr) {
   if (getLexer().isNot(AsmToken::Comma)) {
     SMLoc Loc = getLexer().getLoc();
@@ -2400,23 +2379,48 @@ bool MipsAsmParser::parseDirectiveCPSetup() {
   unsigned Save;
   bool SaveIsReg = true;
 
-  if (!parseRegister(FuncReg))
-    return reportParseError("expected register containing function address");
-  FuncReg = getGPR(FuncReg);
+  SmallVector<std::unique_ptr<MCParsedAsmOperand>, 1> TmpReg;
+  OperandMatchResultTy ResTy = ParseAnyRegister(TmpReg);
+  if (ResTy == MatchOperand_NoMatch) {
+    reportParseError("expected register containing function address");
+    Parser.eatToEndOfStatement();
+    return false;
+  }
+
+  MipsOperand &FuncRegOpnd = static_cast<MipsOperand &>(*TmpReg[0]);
+  if (!FuncRegOpnd.isGPRAsmReg()) {
+    reportParseError(FuncRegOpnd.getStartLoc(), "invalid register");
+    Parser.eatToEndOfStatement();
+    return false;
+  }
+
+  FuncReg = FuncRegOpnd.getGPR32Reg();
+  TmpReg.clear();
 
   if (!eatComma("expected comma parsing directive"))
     return true;
 
-  if (!parseRegister(Save)) {
+  ResTy = ParseAnyRegister(TmpReg);
+  if (ResTy == MatchOperand_NoMatch) {
     const AsmToken &Tok = Parser.getTok();
     if (Tok.is(AsmToken::Integer)) {
       Save = Tok.getIntVal();
       SaveIsReg = false;
       Parser.Lex();
-    } else
-      return reportParseError("expected save register or stack offset");
-  } else
-    Save = getGPR(Save);
+    } else {
+      reportParseError("expected save register or stack offset");
+      Parser.eatToEndOfStatement();
+      return false;
+    }
+  } else {
+    MipsOperand &SaveOpnd = static_cast<MipsOperand &>(*TmpReg[0]);
+    if (!SaveOpnd.isGPRAsmReg()) {
+      reportParseError(SaveOpnd.getStartLoc(), "invalid register");
+      Parser.eatToEndOfStatement();
+      return false;
+    }
+    Save = SaveOpnd.getGPR32Reg();
+  }
 
   if (!eatComma("expected comma parsing directive"))
     return true;
diff --git a/test/MC/Mips/cpsetup-bad.s b/test/MC/Mips/cpsetup-bad.s
new file mode 100644
index 00000000000..09252a1310e
--- /dev/null
+++ b/test/MC/Mips/cpsetup-bad.s
@@ -0,0 +1,14 @@
+# RUN: not llvm-mc %s -triple mips64-unknown-unknown 2>%t1
+# RUN:   FileCheck %s < %t1 -check-prefix=ASM
+
+        .text
+        .option pic2
+t1:
+        .cpsetup $bar, 8, __cerror
+# ASM: :[[@LINE-1]]:18: error: expected register containing function address
+        .cpsetup $33, 8, __cerror
+# ASM: :[[@LINE-1]]:18: error: invalid register
+        .cpsetup $31, foo, __cerror
+# ASM: :[[@LINE-1]]:23: error: expected save register or stack offset
+        .cpsetup $31, $32, __cerror
+# ASM: :[[@LINE-1]]:23: error: invalid register