[llvm-bugs] [Bug 30389] New: Windows style inline assembly. Problem with not restored registers

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=30389

            Bug ID: 30389
           Summary: Windows style inline assembly. Problem with not
                    restored registers
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: adamf88 at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 17263
  --> https://llvm.org/bugs/attachment.cgi?id=17263&action=edit
Sample code and generated assembly

Clang has problem with properly handling windows style assembly.
Code in the attachment runs properly if I compile it with Microsoft compiler.
If I compile it with clang then the program crashes.

After some investigations I suppose, clang requires restoring esp registers.
According to this document (
https://msdn.microsoft.com/en-us/library/k1a8ss06.aspx ) it is not required for
EAX, EBX, ECX, EDX, ESI, EDI registers

Code compiled in clang compiler revision: r279979 from: http://llvm.org/builds/

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