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spirv/tests: add a test for lower_terminate_to_discard

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Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33866>
This commit is contained in:
Samuel Pitoiset 2025-03-04 10:03:26 +01:00 • committed by Marge Bot
parent 40ea8c2edc
commit 682723c0c4
1 changed files with 88 additions and 0 deletions
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88
src/compiler/spirv/tests/workarounds.cpp
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@ -154,3 +154,91 @@ TEST_F(Workarounds, force_tex_non_uniform)
ASSERT_TRUE(tex_instr->texture_non_uniform);
}
TEST_F(Workarounds, lower_terminate_to_discard)
{
/*
OpCapability Shader
OpExtension "SPV_KHR_terminate_invocation"
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %coord %color
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 460
OpSourceExtension "GL_EXT_terminate_invocation"
OpName %main "main"
OpName %coord "coord"
OpName %color "color"
OpDecorate %coord Location 0
OpDecorate %color Location 0
%void = OpTypeVoid
%3 = OpTypeFunction %void
%float = OpTypeFloat 32
%v2float = OpTypeVector %float 2
%_ptr_Input_v2float = OpTypePointer Input %v2float
%coord = OpVariable %_ptr_Input_v2float Input
%uint = OpTypeInt 32 0
%uint_0 = OpConstant %uint 0
%_ptr_Input_float = OpTypePointer Input %float
%float_0 = OpConstant %float 0
%bool = OpTypeBool
%v4float = OpTypeVector %float 4
%_ptr_Output_v4float = OpTypePointer Output %v4float
%color = OpVariable %_ptr_Output_v4float Output
%24 = OpConstantComposite %v4float %float_0 %float_0 %float_0 %float_0
%main = OpFunction %void None %3
%5 = OpLabel
%13 = OpAccessChain %_ptr_Input_float %coord %uint_0
%14 = OpLoad %float %13
%17 = OpFOrdEqual %bool %14 %float_0
OpSelectionMerge %19 None
OpBranchConditional %17 %18 %19
%18 = OpLabel
OpTerminateInvocation
%19 = OpLabel
OpStore %color %24
OpReturn
OpFunctionEnd
*/
static const uint32_t words[] = {
0x07230203, 0x00010000, 0x0008000b, 0x00000019, 0x00000000, 0x00020011,
0x00000001, 0x0009000a, 0x5f565053, 0x5f52484b, 0x6d726574, 0x74616e69,
0x6e695f65, 0x61636f76, 0x6e6f6974, 0x00000000, 0x0006000b, 0x00000001,
0x4c534c47, 0x6474732e, 0x3035342e, 0x00000000, 0x0003000e, 0x00000000,
0x00000001, 0x0007000f, 0x00000004, 0x00000004, 0x6e69616d, 0x00000000,
0x00000009, 0x00000017, 0x00030010, 0x00000004, 0x00000007, 0x00030003,
0x00000002, 0x000001cc, 0x00080004, 0x455f4c47, 0x745f5458, 0x696d7265,
0x6574616e, 0x766e695f, 0x7461636f, 0x006e6f69, 0x00040005, 0x00000004,
0x6e69616d, 0x00000000, 0x00040005, 0x00000009, 0x726f6f63, 0x00000064,
0x00040005, 0x00000017, 0x6f6c6f63, 0x00000072, 0x00040047, 0x00000009,
0x0000001e, 0x00000000, 0x00040047, 0x00000017, 0x0000001e, 0x00000000,
0x00020013, 0x00000002, 0x00030021, 0x00000003, 0x00000002, 0x00030016,
0x00000006, 0x00000020, 0x00040017, 0x00000007, 0x00000006, 0x00000002,
0x00040020, 0x00000008, 0x00000001, 0x00000007, 0x0004003b, 0x00000008,
0x00000009, 0x00000001, 0x00040015, 0x0000000a, 0x00000020, 0x00000000,
0x0004002b, 0x0000000a, 0x0000000b, 0x00000000, 0x00040020, 0x0000000c,
0x00000001, 0x00000006, 0x0004002b, 0x00000006, 0x0000000f, 0x00000000,
0x00020014, 0x00000010, 0x00040017, 0x00000015, 0x00000006, 0x00000004,
0x00040020, 0x00000016, 0x00000003, 0x00000015, 0x0004003b, 0x00000016,
0x00000017, 0x00000003, 0x0007002c, 0x00000015, 0x00000018, 0x0000000f,
0x0000000f, 0x0000000f, 0x0000000f, 0x00050036, 0x00000002, 0x00000004,
0x00000000, 0x00000003, 0x000200f8, 0x00000005, 0x00050041, 0x0000000c,
0x0000000d, 0x00000009, 0x0000000b, 0x0004003d, 0x00000006, 0x0000000e,
0x0000000d, 0x000500b4, 0x00000010, 0x00000011, 0x0000000e, 0x0000000f,
0x000300f7, 0x00000013, 0x00000000, 0x000400fa, 0x00000011, 0x00000012,
0x00000013, 0x000200f8, 0x00000012, 0x00011140, 0x000200f8, 0x00000013,
0x0003003e, 0x00000017, 0x00000018, 0x000100fd, 0x00010038,
};
spirv_options.workarounds.lower_terminate_to_discard = true;
/* Emitting demote instead of terminate is needed to verify the SPIR-V
* workaround, otherwise terminate is always used.
*/
nir_options.discard_is_demote = true;
get_nir(sizeof(words) / sizeof(words[0]), words, MESA_SHADER_FRAGMENT);
nir_intrinsic_instr *intrinsic = find_intrinsic(nir_intrinsic_demote, 0);
ASSERT_NE(intrinsic, nullptr);
}