GlslangToSpv: prevent add XfbStride twice
Without this commit, if the XfbStride was explicitly set, the
decoration was added twice on the shader.
v2 (changes after Jonh Kessenich first review)
* Simplified by just removing the firs assignment
* Removed assert
diff --git a/SPIRV/GlslangToSpv.cpp b/SPIRV/GlslangToSpv.cpp
index 5c00024..495a976 100755
--- a/SPIRV/GlslangToSpv.cpp
+++ b/SPIRV/GlslangToSpv.cpp
@@ -7163,8 +7163,6 @@
builder.addDecoration(id, spv::DecorationInputAttachmentIndex, symbol->getQualifier().layoutAttachment);
if (glslangIntermediate->getXfbMode()) {
builder.addCapability(spv::CapabilityTransformFeedback);
- if (symbol->getQualifier().hasXfbStride())
- builder.addDecoration(id, spv::DecorationXfbStride, symbol->getQualifier().layoutXfbStride);
if (symbol->getQualifier().hasXfbBuffer()) {
builder.addDecoration(id, spv::DecorationXfbBuffer, symbol->getQualifier().layoutXfbBuffer);
unsigned stride = glslangIntermediate->getXfbStride(symbol->getQualifier().layoutXfbBuffer);
diff --git a/Test/baseResults/spv.xfbStrideJustOnce.vert.out b/Test/baseResults/spv.xfbStrideJustOnce.vert.out
new file mode 100644
index 0000000..9b459b5
--- /dev/null
+++ b/Test/baseResults/spv.xfbStrideJustOnce.vert.out
@@ -0,0 +1,74 @@
+spv.xfbStrideJustOnce.vert
+// Module Version 10000
+// Generated by (magic number): 80007
+// Id's are bound by 33
+
+ Capability Shader
+ Capability TransformFeedback
+ 1: ExtInstImport "GLSL.std.450"
+ MemoryModel Logical GLSL450
+ EntryPoint Vertex 4 "main" 10 27 31 32
+ ExecutionMode 4 Xfb
+ Source GLSL 450
+ Name 4 "main"
+ Name 8 "block"
+ MemberName 8(block) 0 "y1_out"
+ MemberName 8(block) 1 "y2_out"
+ Name 10 ""
+ Name 25 "gl_PerVertex"
+ MemberName 25(gl_PerVertex) 0 "gl_Position"
+ MemberName 25(gl_PerVertex) 1 "gl_PointSize"
+ MemberName 25(gl_PerVertex) 2 "gl_ClipDistance"
+ MemberName 25(gl_PerVertex) 3 "gl_CullDistance"
+ Name 27 ""
+ Name 31 "gl_VertexID"
+ Name 32 "gl_InstanceID"
+ Decorate 8(block) Block
+ Decorate 10 Location 5
+ Decorate 10 XfbBuffer 2
+ Decorate 10 XfbStride 20
+ MemberDecorate 25(gl_PerVertex) 0 BuiltIn Position
+ MemberDecorate 25(gl_PerVertex) 1 BuiltIn PointSize
+ MemberDecorate 25(gl_PerVertex) 2 BuiltIn ClipDistance
+ MemberDecorate 25(gl_PerVertex) 3 BuiltIn CullDistance
+ Decorate 25(gl_PerVertex) Block
+ Decorate 27 XfbBuffer 0
+ Decorate 27 XfbStride 0
+ Decorate 31(gl_VertexID) BuiltIn VertexId
+ Decorate 32(gl_InstanceID) BuiltIn InstanceId
+ 2: TypeVoid
+ 3: TypeFunction 2
+ 6: TypeFloat 32
+ 7: TypeVector 6(float) 4
+ 8(block): TypeStruct 6(float) 7(fvec4)
+ 9: TypePointer Output 8(block)
+ 10: 9(ptr) Variable Output
+ 11: TypeInt 32 1
+ 12: 11(int) Constant 0
+ 13: 6(float) Constant 1088421888
+ 14: TypePointer Output 6(float)
+ 16: 11(int) Constant 1
+ 17: 6(float) Constant 1065353216
+ 18: 6(float) Constant 0
+ 19: 7(fvec4) ConstantComposite 17 18 18 17
+ 20: TypePointer Output 7(fvec4)
+ 22: TypeInt 32 0
+ 23: 22(int) Constant 1
+ 24: TypeArray 6(float) 23
+25(gl_PerVertex): TypeStruct 7(fvec4) 6(float) 24 24
+ 26: TypePointer Output 25(gl_PerVertex)
+ 27: 26(ptr) Variable Output
+ 28: 7(fvec4) ConstantComposite 18 18 18 18
+ 30: TypePointer Input 11(int)
+ 31(gl_VertexID): 30(ptr) Variable Input
+32(gl_InstanceID): 30(ptr) Variable Input
+ 4(main): 2 Function None 3
+ 5: Label
+ 15: 14(ptr) AccessChain 10 12
+ Store 15 13
+ 21: 20(ptr) AccessChain 10 16
+ Store 21 19
+ 29: 20(ptr) AccessChain 27 12
+ Store 29 28
+ Return
+ FunctionEnd
diff --git a/Test/spv.xfbStrideJustOnce.vert b/Test/spv.xfbStrideJustOnce.vert
new file mode 100644
index 0000000..2798c6a
--- /dev/null
+++ b/Test/spv.xfbStrideJustOnce.vert
@@ -0,0 +1,14 @@
+#version 450
+
+layout(xfb_buffer=2) out;
+
+layout(location=5, xfb_stride=20) out block {
+ float y1_out;
+ vec4 y2_out;
+};
+
+void main() {
+ y1_out = 7.0;
+ y2_out = vec4(1.0, 0.0, 0.0, 1.0);
+ gl_Position = vec4(0.0);
+}
diff --git a/gtests/Spv.FromFile.cpp b/gtests/Spv.FromFile.cpp
index 66780f7..1e17736 100755
--- a/gtests/Spv.FromFile.cpp
+++ b/gtests/Spv.FromFile.cpp
@@ -450,6 +450,7 @@
"spv.xfbOffsetOnBlockMembersAssignment.vert",
"spv.xfbOffsetOnStructMembersAssignment.vert",
"spv.xfbOverlapOffsetCheckWithBlockAndMember.vert",
+ "spv.xfbStrideJustOnce.vert",
})),
FileNameAsCustomTestSuffix
);
