[llvm-bugs] [Bug 24386] New: compiler aborted with "Function return type does not match operand type of return inst!"

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=24386

            Bug ID: 24386
           Summary: compiler aborted with "Function return type does not
                    match operand type of return inst!"
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: ARM
          Assignee: unassignedbugs at nondot.org
          Reporter: chh at google.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

The test case is reduced from main-05c473.cpp in
https://code.google.com/p/android/issues/detail?id=182036

$ cat test.cpp

struct Vec2 {
    union {
        struct {
            float x, y;
        };
        float data[2];
    };
};
Vec2 getVec2()
{
    Vec2 out;
    union { Vec2* v; unsigned char* u; } x;
    x.v = &out;
    return out;
}


$ clang++ \
-cc1 \
-triple armv7-none-linux-androideabi \
-target-cpu cortex-a8 \
-target-abi aapcs-linux \
-mfloat-abi hard \
-x c++ -emit-llvm \
test.cpp


Clang++ aborted with error message:

Function return type does not match operand type of return inst!
  ret void <badref>
 %struct.Vec2 = type { %union.anon }fatal error: error in backend: Broken
function found, compilation aborted!

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