[llvm-bugs] [Bug 26304] New: [X86] Omit frame pointer even with -fno-emit-frame-pointer if there are no locals

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=26304

            Bug ID: 26304
           Summary: [X86] Omit frame pointer even with
                    -fno-emit-frame-pointer if there are no locals
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: hans at chromium.org
                CC: llvm-bugs at lists.llvm.org
            Blocks: 26299
    Classification: Unclassified

For this example:

  int g(int);
  int f() {
    return g(42);
  }

even with /Oy- MSVC will not set ebp:

_f:
  00000000: 6A 2A              push        2Ah
  00000002: E8 00 00 00 00     call        _g
  00000007: 59                 pop         ecx
  00000008: C3                 ret


whereas Clang does.

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