[llvm-bugs] [Bug 31005] New: inline asm global registers compatibility to gcc+icc

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=31005

            Bug ID: 31005
           Summary: inline asm global registers compatibility to gcc+icc
           Product: new-bugs
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: ziv.izhar at intel.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

in clang, the following lines produce an error:
register int foo asm("al");
int main() {
}
error: register 'al' unsuitable for global register variables on this target

while in gcc + icc these lines compile with a new meanning: instead of al (or
ax,eax,rax), it acts like it's all the eax register.

in clang however we get the error specified before.

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