Vulkan starts only quads holding a non-helper lane, so the bit is set in every
lane it runs. Stray's pixel shader 0x2012f90000 keeps the packed ancillary
word where that bit is clear, and failed with an unsupported live use.
(cherry picked from commit 2068089b3d75fae55d0994a0916a22bffd7ee2a4)
A descriptor dword built by S_BREV_B32, V_BFREV_B32 or S_BREV_B64 from a
constant stayed a runtime value, so the resource could not be resolved
and the shader failed to prepare. The constant folder now reverses the
bits of an immediate the way the hardware does (D[31-i] = S0[i]), like
the existing BitCount32 fold. ConstantBitTest covers the fold.
Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
A select of exec and zero gives a mask that is the same for every lane. Reading
it back went through a lane number, which Metal does not have in a vertex
shader, so MoltenVK rejected the shader. The select now stores the lane bit and
marks the pair as a mask, a constant mask word reads as a constant, and the
constant folder removes the bit test on an all-zero or all-one word.
agc_scalar_select_mask runs the translated IR over a wave and pins the lane
values for scc set and clear, a source that differs per lane, the two wave64
halves differing, a destination that is also a source, and constant and
literal sources.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
A use of the packed ancillary VGPR other than a constant field extract (the word passed through a
select before its sample number is extracted) reads the word rebuilt from the sample number (bit 8)
and the render target index (bit 16). Extracts of other bits straight from the word stay refused, and
the refusal now names the uses.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Any other live use of the packed register keeps throwing, as on main, instead of
reading SampleId << 8 | Layer << 16 with the other bits zero. The field range
check no longer underflows for an extract that starts past a field's end.
Adds the pixel_ancillary recompiler test.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Bit-field extracts of the packed ancillary VGPR become gl_SampleID and gl_Layer reads. A pixel
shader reading gl_Layer needs the Geometry capability instead of ShaderLayer and SPIR-V 1.5, and
the Geometry capability is available whenever the geometryShader feature is. 32-bit
SPI_SHADER_Z_FORMATs and 32_ABGR are accepted with the depth and sample-mask export enables.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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