Bitcast loads from builtin compute variables.
diff --git a/reference/opt/shaders/asm/comp/builtin-compute-bitcast.asm.comp b/reference/opt/shaders/asm/comp/builtin-compute-bitcast.asm.comp
new file mode 100644
index 0000000..abb8a79
--- /dev/null
+++ b/reference/opt/shaders/asm/comp/builtin-compute-bitcast.asm.comp
@@ -0,0 +1,13 @@
+#version 450
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+
+layout(binding = 0, std430) buffer BUF
+{
+ int values[];
+} _6;
+
+void main()
+{
+ _6.values[int(gl_WorkGroupID.y)] = int(gl_GlobalInvocationID.z);
+}
+
diff --git a/reference/shaders/asm/comp/builtin-compute-bitcast.asm.comp b/reference/shaders/asm/comp/builtin-compute-bitcast.asm.comp
new file mode 100644
index 0000000..abb8a79
--- /dev/null
+++ b/reference/shaders/asm/comp/builtin-compute-bitcast.asm.comp
@@ -0,0 +1,13 @@
+#version 450
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+
+layout(binding = 0, std430) buffer BUF
+{
+ int values[];
+} _6;
+
+void main()
+{
+ _6.values[int(gl_WorkGroupID.y)] = int(gl_GlobalInvocationID.z);
+}
+
diff --git a/shaders/asm/comp/builtin-compute-bitcast.asm.comp b/shaders/asm/comp/builtin-compute-bitcast.asm.comp
new file mode 100644
index 0000000..4bc9202
--- /dev/null
+++ b/shaders/asm/comp/builtin-compute-bitcast.asm.comp
@@ -0,0 +1,50 @@
+; SPIR-V
+; Version: 1.0
+; Generator: Khronos Glslang Reference Front End; 6
+; Bound: 26
+; Schema: 0
+ OpCapability Shader
+ %1 = OpExtInstImport "GLSL.std.450"
+ OpMemoryModel Logical GLSL450
+ OpEntryPoint GLCompute %main "main" %gl_WorkGroupID %gl_GlobalInvocationID
+ OpExecutionMode %main LocalSize 1 1 1
+ OpSource GLSL 450
+ OpName %main "main"
+ OpName %BUF "BUF"
+ OpMemberName %BUF 0 "values"
+ OpName %_ ""
+ OpName %gl_WorkGroupID "gl_WorkGroupID"
+ OpName %gl_GlobalInvocationID "gl_GlobalInvocationID"
+ OpDecorate %_runtimearr_int ArrayStride 4
+ OpMemberDecorate %BUF 0 Offset 0
+ OpDecorate %BUF BufferBlock
+ OpDecorate %_ DescriptorSet 0
+ OpDecorate %_ Binding 0
+ OpDecorate %gl_WorkGroupID BuiltIn WorkgroupId
+ OpDecorate %gl_GlobalInvocationID BuiltIn GlobalInvocationId
+ %void = OpTypeVoid
+ %int = OpTypeInt 32 1
+%_runtimearr_int = OpTypeRuntimeArray %int
+ %3 = OpTypeFunction %void
+ %BUF = OpTypeStruct %_runtimearr_int
+%_ptr_Uniform_BUF = OpTypePointer Uniform %BUF
+ %_ = OpVariable %_ptr_Uniform_BUF Uniform
+ %int_0 = OpConstant %int 0
+ %v3int = OpTypeVector %int 3
+%_ptr_Input_v3int = OpTypePointer Input %v3int
+%gl_WorkGroupID = OpVariable %_ptr_Input_v3int Input
+ %int_1 = OpConstant %int 1
+%_ptr_Input_int = OpTypePointer Input %int
+%gl_GlobalInvocationID = OpVariable %_ptr_Input_v3int Input
+ %int_2 = OpConstant %int 2
+%_ptr_Uniform_int = OpTypePointer Uniform %int
+ %main = OpFunction %void None %3
+ %5 = OpLabel
+ %18 = OpAccessChain %_ptr_Input_int %gl_WorkGroupID %int_1
+ %19 = OpLoad %int %18
+ %22 = OpAccessChain %_ptr_Input_int %gl_GlobalInvocationID %int_2
+ %23 = OpLoad %int %22
+ %25 = OpAccessChain %_ptr_Uniform_int %_ %int_0 %19
+ OpStore %25 %23
+ OpReturn
+ OpFunctionEnd
diff --git a/spirv_glsl.cpp b/spirv_glsl.cpp
index 0fc7701..9f2b11b 100644
--- a/spirv_glsl.cpp
+++ b/spirv_glsl.cpp
@@ -10070,6 +10070,10 @@
void CompilerGLSL::bitcast_from_builtin_load(uint32_t source_id, std::string &expr,
const spirv_cross::SPIRType &expr_type)
{
+ auto *var = maybe_get_backing_variable(source_id);
+ if (var)
+ source_id = var->self;
+
// Only interested in standalone builtin variables.
if (!has_decoration(source_id, DecorationBuiltIn))
return;
@@ -10094,6 +10098,15 @@
expected_type = SPIRType::Int;
break;
+ case BuiltInGlobalInvocationId:
+ case BuiltInLocalInvocationId:
+ case BuiltInWorkgroupId:
+ case BuiltInLocalInvocationIndex:
+ case BuiltInWorkgroupSize:
+ case BuiltInNumWorkgroups:
+ expected_type = SPIRType::UInt;
+ break;
+
default:
break;
}
