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SPV: Fix 'location' inheritance bug.

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This commit is contained in:
John Kessenich 2016-02-19 12:21:50 -07:00
parent 5047c6f7a7
commit 0967748fbc
4 changed files with 37 additions and 14 deletions
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30
SPIRV/GlslangToSpv.cpp
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@ -535,8 +535,6 @@ void InheritQualifiers(glslang::TQualifier& child, const glslang::TQualifier& pa
child.patch = true;
if (parent.sample)
child.sample = true;
child.layoutLocation = parent.layoutLocation;
}
bool HasNonLayoutQualifiers(const glslang::TQualifier& qualifier)
@ -1723,10 +1721,14 @@ spv::Id TGlslangToSpvTraverser::convertGlslangToSpvType(const glslang::TType& ty
// modify just this child's view of the qualifier
glslang::TQualifier subQualifier = glslangType.getQualifier();
InheritQualifiers(subQualifier, qualifier);
if (qualifier.hasLocation()) {
subQualifier.layoutLocation += locationOffset;
// manually inherit location; it's more complex
if (! subQualifier.hasLocation() && qualifier.hasLocation())
subQualifier.layoutLocation = qualifier.layoutLocation + locationOffset;
if (qualifier.hasLocation())
locationOffset += glslangIntermediate->computeTypeLocationSize(glslangType);
}
// recurse
structFields.push_back(convertGlslangToSpvType(glslangType, explicitLayout, subQualifier));
}
}
@ -1756,10 +1758,22 @@ spv::Id TGlslangToSpvTraverser::convertGlslangToSpvType(const glslang::TType& ty
addMemberDecoration(spvType, member, TranslatePrecisionDecoration(glslangType));
addMemberDecoration(spvType, member, TranslateInterpolationDecoration(subQualifier));
addMemberDecoration(spvType, member, TranslateInvariantDecoration(subQualifier));
if (qualifier.hasLocation()) {
builder.addMemberDecoration(spvType, member, spv::DecorationLocation, qualifier.layoutLocation + locationOffset);
// compute location decoration; tricky based on whether inheritance is at play
// TODO: This algorithm (and it's cousin above doing almost the same thing) should
// probably move to the linker stage of the front end proper, and just have the
// answer sitting already distributed throughout the individual member locations.
int location = -1; // will only decorate if present or inherited
if (subQualifier.hasLocation()) // no inheritance, or override of inheritance
location = subQualifier.layoutLocation;
else if (qualifier.hasLocation()) // inheritance
location = qualifier.layoutLocation + locationOffset;
if (qualifier.hasLocation()) // track for upcoming inheritance
locationOffset += glslangIntermediate->computeTypeLocationSize(glslangType);
}
if (location >= 0)
builder.addMemberDecoration(spvType, member, spv::DecorationLocation, location);
// component, XFB, others
if (glslangType.getQualifier().hasComponent())
builder.addMemberDecoration(spvType, member, spv::DecorationComponent, glslangType.getQualifier().layoutComponent);
if (glslangType.getQualifier().hasXfbOffset())

16
Test/baseResults/spv.430.vert.out
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@ -1,5 +1,5 @@
spv.430.vert
Warning, version 430 is not yet complete; most version-specific features are present, but some are missing.
Warning, version 450 is not yet complete; most version-specific features are present, but some are missing.
Linked vertex stage:
@ -7,14 +7,14 @@ Linked vertex stage:
// Module Version 10000
// Generated by (magic number): 80001
// Id's are bound by 63
// Id's are bound by 66
Capability Shader
Capability ClipDistance
1: ExtInstImport "GLSL.std.450"
MemoryModel Logical GLSL450
EntryPoint Vertex 4 "main" 12 23 34 38 41 42 62
Source GLSL 430
EntryPoint Vertex 4 "main" 12 23 34 38 41 42 62 65
Source GLSL 450
Name 4 "main"
Name 10 "gl_PerVertex"
MemberName 10(gl_PerVertex) 0 "gl_ClipDistance"
@ -42,6 +42,9 @@ Linked vertex stage:
MemberName 60(SS) 1 "s"
MemberName 60(SS) 2 "c"
Name 62 "var"
Name 63 "MS"
MemberName 63(MS) 0 "f"
Name 65 "outMS"
MemberDecorate 10(gl_PerVertex) 0 BuiltIn ClipDistance
Decorate 10(gl_PerVertex) Block
Decorate 34(badorder3) Flat
@ -72,6 +75,8 @@ Linked vertex stage:
MemberDecorate 60(SS) 1 Location 1
MemberDecorate 60(SS) 2 Flat
MemberDecorate 60(SS) 2 Location 4
MemberDecorate 63(MS) 0 Location 17
Decorate 63(MS) Block
2: TypeVoid
3: TypeFunction 2
6: TypeFloat 32
@ -121,6 +126,9 @@ Linked vertex stage:
60(SS): TypeStruct 19(fvec4) 59(S) 19(fvec4)
61: TypePointer Output 60(SS)
62(var): 61(ptr) Variable Output
63(MS): TypeStruct 6(float)
64: TypePointer Output 63(MS)
65(outMS): 64(ptr) Variable Output
4(main): 2 Function None 3
5: Label
18: 17(ptr) AccessChain 12 14 15

3
Test/spv.430.vert
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@ -1,4 +1,4 @@
#version 430 core
#version 450 core
@ -34,3 +34,4 @@ layout(binding = 31) uniform sampler2D sampb4;
struct S { mediump float a; highp uvec2 b; highp vec3 c; };
struct SS { vec4 b; S s; vec4 c; };
layout(location = 0) flat out SS var;
out MS { layout(location = 17) float f; } outMS;

2
glslang/Include/BaseTypes.h
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@ -71,7 +71,7 @@ enum TStorageQualifier {
EvqGlobal, // For globals read/write
EvqConst, // User-defined constant values, will be semantically constant and constant folded
EvqVaryingIn, // pipeline input, read only, also supercategory for all built-ins not included in this enum (see TBuiltInVariable)
EvqVaryingOut, // pipeline ouput, read/write, also supercategory for all built-ins not included in this enum (see TBuiltInVariable)
EvqVaryingOut, // pipeline output, read/write, also supercategory for all built-ins not included in this enum (see TBuiltInVariable)
EvqUniform, // read only, shared with app
EvqBuffer, // read/write, shared with app
EvqShared, // compute shader's read/write 'shared' qualifier