[llvm-bugs] [Bug 40967] New: Cannot select for inline assembly

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=40967

            Bug ID: 40967
           Summary: Cannot select for inline assembly
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: jleahy at gmail.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org,
                    neeilans at live.com, richard-llvm at metafoo.co.uk

The following code causes trunk clang (and previous versions) to crash with
'cannot select'.

typedef float __m128 __attribute__((__vector_size__(16)));
__m128 foo(float value) {
    __m128 t;
    asm("":"=x"(t):"0"(value));
    return t;
}

Error:

fatal error: error in backend: Cannot select: 0x55d249ef7378: v4f32,ch =
load<LD4[%2](dereferenceable), anyext from f32> 0x55d249ef7720,
FrameIndex:i64<0>, undef:i64
  0x55d249ef76b8: i64 = FrameIndex<0>
  0x55d249ef71d8: i64 = undef

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