[llvm-bugs] [Bug 25558] New: Clang interprets input as unicode in assembly file

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https://llvm.org/bugs/show_bug.cgi?id=25558

            Bug ID: 25558
           Summary: Clang interprets input as unicode in assembly file
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: viniciustinti at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 15305
  --> https://llvm.org/bugs/attachment.cgi?id=15305&action=edit
Example: macro.S and clang generated files macro.s and macro.ll

When trying to build the following code:

// macro.S
//
// clang -target arm-linux-gnueabihf -no-integrated-as -S -c -o macro.s macro.S
//
.macro  my_macro, trace=1, uaccess=1
.if \uaccess
        mov r0, r0
.endif
.endm

foo:
        my_macro trace=0
// end

Clang interprets the \uacce as an Unicode character and emits it in the
assembly file. It even emits it in the bitcode file.

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