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llvm-project/llvm/test/MC/ARM/comment.s

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Integrated assembler incorrectly lexes ARM-style comments The integrated assembler fails to properly lex arm comments when they are adjacent to an identifier in the input stream. The reason is that the arm comment symbol '@' is also used as symbol variant in other assembly languages so when lexing an identifier it allows the '@' symbol as part of the identifier. Example: $ cat comment.s foo: add r0, r0@got to parse this as a comment $ llvm-mc -triple armv7 comment.s comment.s:4:18: error: unexpected token in argument list add r0, r0@got to parse this as a comment ^ This should be parsed as correctly as `add r0, r0`. This commit modifes the assembly lexer to not include the '@' symbol in identifiers when lexing for targets that use '@' for comments. llvm-svn: 196607
2013-12-07 04:35:58 +08:00
@ Tests to check that '@' does not get lexed as an identifier for arm
@ RUN: llvm-mc %s -triple=armv7-linux-gnueabi | FileCheck %s
@ RUN: llvm-mc %s -triple=armv7-linux-gnueabi 2>&1 | FileCheck %s --check-prefix=ERROR
foo:
bl boo@plt should be ignored
bl goo@plt
.long bar@got to parse this as a comment
.long baz@got
add r0, r0@ignore this extra junk
@CHECK-LABEL: foo:
@CHECK: bl boo
@CHECK-NOT: @
@CHECK: bl goo
@CHECK-NOT: @
@CHECK: .long bar
@CHECK-NOT: @
@CHECK: .long baz
@CHECK-NOT: @
@CHECK: add r0, r0
@CHECK-NOT: @
@ERROR-NOT: error: