[llvm-bugs] [Bug 40956] New: Inline Assembly requires more registers (x86)

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https://bugs.llvm.org/show_bug.cgi?id=40956

            Bug ID: 40956
           Summary: Inline Assembly requires more registers (x86)
           Product: libraries
           Version: 8.0
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: cmucchietto at wallix.com
                CC: craig.topper at gmail.com, llvm-bugs at lists.llvm.org,
                    llvm-dev at redking.me.uk, spatel+llvm at rotateright.com

Created attachment 21561
  --> https://bugs.llvm.org/attachment.cgi?id=21561&action=edit
Failure in inline compilation

I have an error while compilingC with inline assembly on x86 32bits with a code
that use 5 registers, I have the following error:

error: inline assembly requires more registers than available at line XXXXX

I have reduced the problem to this specific code (see attached IR file). With
this code, the error is always triggered. By moving the line 
   %9 = alloca i32, align 4   
before the branch instruction, the code compile without errors. By moving the
line
   %8 = alloca i32, align 4
the error is displayed 2 times.

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