Fix PR23872: Integrated assembler error message when using .type directive with @ in AArch32 assembly.

The AArch32 assembler parses the '@' as a comment symbol, so the error message shouldn't suggest
that '@<type>' is a valid replacement when assembling for AArch32 target.

Differential Revision: http://reviews.llvm.org/D10651 

llvm-svn: 241149

2 files changed, 38 insertions, 4 deletions

diff --git a/llvm/lib/MC/MCParser/ELFAsmParser.cpp b/llvm/lib/MC/MCParser/ELFAsmParser.cpp
index e3585bd2763..5f8a6039afd 100644
--- a/llvm/lib/MC/MCParser/ELFAsmParser.cpp
+++ b/llvm/lib/MC/MCParser/ELFAsmParser.cpp
@@ -593,10 +593,16 @@ bool ELFAsmParser::ParseDirectiveType(StringRef, SMLoc) {
     Lex();
 
   if (getLexer().isNot(AsmToken::Identifier) &&
-      getLexer().isNot(AsmToken::Hash) && getLexer().isNot(AsmToken::At) &&
-      getLexer().isNot(AsmToken::Percent) && getLexer().isNot(AsmToken::String))
-    return TokError("expected STT_<TYPE_IN_UPPER_CASE>, '#<type>', '@<type>', "
-                    "'%<type>' or \"<type>\"");
+      getLexer().isNot(AsmToken::Hash) &&
+      getLexer().isNot(AsmToken::Percent) &&
+      getLexer().isNot(AsmToken::String)) {
+    if (!getLexer().getAllowAtInIdentifier())
+      return TokError("expected STT_<TYPE_IN_UPPER_CASE>, '#<type>', "
+                      "'%<type>' or \"<type>\"");
+    else if (getLexer().isNot(AsmToken::At))
+      return TokError("expected STT_<TYPE_IN_UPPER_CASE>, '#<type>', '@<type>', "
+                      "'%<type>' or \"<type>\"");
+  }
 
   if (getLexer().isNot(AsmToken::String) &&
       getLexer().isNot(AsmToken::Identifier))
diff --git a/llvm/test/MC/ELF/gnu-type-diagnostics.s b/llvm/test/MC/ELF/gnu-type-diagnostics.s
index df87d6df082..11dac3594f5 100644
--- a/llvm/test/MC/ELF/gnu-type-diagnostics.s
+++ b/llvm/test/MC/ELF/gnu-type-diagnostics.s
@@ -1,4 +1,29 @@
 // RUN: not llvm-mc -triple i686-elf -filetype asm -o /dev/null %s 2>&1 | FileCheck %s
+// RUN: not llvm-mc -triple aarch64-elf -filetype asm -o /dev/null %s 2>&1 | FileCheck %s
+// RUN: not llvm-mc -triple arm-elf -filetype asm -o /dev/null %s 2>&1 \
+// RUN:     | FileCheck -check-prefix=CHECK-INVALID-AT-IN-TYPE-DIRECTIVE %s
+// RUN: not llvm-mc -triple armeb-elf -filetype asm -o /dev/null %s 2>&1 \
+// RUN:     | FileCheck -check-prefix=CHECK-INVALID-AT-IN-TYPE-DIRECTIVE %s
+// RUN: not llvm-mc -triple thumb-elf -filetype asm -o /dev/null %s 2>&1 \
+// RUN:     | FileCheck -check-prefix=CHECK-INVALID-AT-IN-TYPE-DIRECTIVE %s
+// RUN: not llvm-mc -triple thumbeb-elf -filetype asm -o /dev/null %s 2>&1 \
+// RUN:     | FileCheck -check-prefix=CHECK-INVALID-AT-IN-TYPE-DIRECTIVE %s
+// RUN: not llvm-mc -triple arm-coff -filetype asm -o /dev/null %s 2>&1 \
+// RUN:     | FileCheck -check-prefix=CHECK-INVALID-AT-IN-TYPE-DIRECTIVE %s
+// RUN: not llvm-mc -triple armeb-coff -filetype asm -o /dev/null %s 2>&1 \
+// RUN:     | FileCheck -check-prefix=CHECK-INVALID-AT-IN-TYPE-DIRECTIVE %s
+// RUN: not llvm-mc -triple thumb-coff -filetype asm -o /dev/null %s 2>&1 \
+// RUN:     | FileCheck -check-prefix=CHECK-INVALID-AT-IN-TYPE-DIRECTIVE %s
+// RUN: not llvm-mc -triple thumbeb-coff -filetype asm -o /dev/null %s 2>&1 \
+// RUN:     | FileCheck -check-prefix=CHECK-INVALID-AT-IN-TYPE-DIRECTIVE %s
+// RUN: not llvm-mc -triple arm-apple -filetype asm -o /dev/null %s 2>&1 \
+// RUN:     | FileCheck -check-prefix=CHECK-INVALID-AT-IN-TYPE-DIRECTIVE %s
+// RUN: not llvm-mc -triple armeb-apple -filetype asm -o /dev/null %s 2>&1 \
+// RUN:     | FileCheck -check-prefix=CHECK-INVALID-AT-IN-TYPE-DIRECTIVE %s
+// RUN: not llvm-mc -triple thumb-apple -filetype asm -o /dev/null %s 2>&1 \
+// RUN:     | FileCheck -check-prefix=CHECK-INVALID-AT-IN-TYPE-DIRECTIVE %s
+// RUN: not llvm-mc -triple thumbeb-apple -filetype asm -o /dev/null %s 2>&1 \
+// RUN:     | FileCheck -check-prefix=CHECK-INVALID-AT-IN-TYPE-DIRECTIVE %s
 
 	.type TYPE FUNC
 // CHECK: error: unsupported attribute in '.type' directive
@@ -15,4 +40,7 @@
 // CHECK: .type symbol 32
 // CHECK:              ^
 
+// CHECK-INVALID-AT-IN-TYPE-DIRECTIVE: error: expected STT_<TYPE_IN_UPPER_CASE>, '#<type>', '%<type>' or "<type>"
+// CHECK-INVALID-AT-IN-TYPE-DIRECTIVE: .type symbol 32
+// CHECK-INVALID-AT-IN-TYPE-DIRECTIVE:              ^