https://llvm.org/bugs/show_bug.cgi?id=27884
Bug ID: 27884
Summary: Assembler not accepting hex constants that include
'0b' or '0B' as first characters in intel syntax
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: MC
Assignee: unassignedb...@nondot.org
Reporter: douglas_y...@playstation.sony.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Consider the following assembly code:
.intel_syntax
add rax, 0A0h
add rax, 0a0h
add rbx, 0B0h
add rbx, 0b0h
Both lines are in intel syntax and add a hexadecimal constant to the value in a
register. However, when you try to compile this using clang, you get an error:
reduced3.asm:4:14: error: unknown token in expression
add rbx, 0B0h
^
reduced3.asm:5:14: error: unknown token in expression
add rbx, 0b0h
^
(The carat points to just after the 'h' character if it gets mangled). I
suspect this is because the function AsmLexer::LexDigit() in AsmLexer.cpp i
parsing assuming AT&T syntax and gets confused. Prior to the change in r263802,
the compiler was correctly accepting the constant when it was '0B', but after
that change, both are causing errors.
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