Invalid DXIL IR for library shader is being generated

[coopp]

A shader that is compiled as a library shade that references a RWBuffer and a Test( ) function is generating odd DXIL IR.

https://godbolt.org/z/cKbeM6438

RWBuffer<float4> my_buffer : register(u2, space4);

export float4 test()
{
    return my_buffer[0];
}

A function is generated with extra ( ).

define <4 x float> @test()() local_unnamed_addr #0 !dbg !51 {
.
.
.
}

Changing compilation to have a compute shader entrypoint and specifying cs_6_6 fixes this issue.

[llvmbot]

@llvm/issue-subscribers-bug

Author: Cooper Partin (coopp)

A shader that is compiled as a library shade that references a RWBuffer and a Test( ) function is generating odd DXIL IR.

https://godbolt.org/z/cKbeM6438

RWBuffer<float4> my_buffer : register(u2, space4);

export float4 test()
{
    return my_buffer[0];
}

A function is generated with extra ( ).

define &lt;4 x float&gt; @<!-- -->test()() local_unnamed_addr #<!-- -->0 !dbg !51 {
.
.
.
}

Changing compilation to have a compute shader entrypoint and specifying cs_6_6 fixes this issue.