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SPV return from main: Simplify a legacy design such returns are not jumps to exit block.

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Structured control-flow rules allow leaving the middle of a construct through
a return, but not through a jump to a block that does a return.

Addresses issue #58.
This commit is contained in:
John Kessenich
2015-09-14 20:58:02 -06:00
parent 5f5b205ce9
commit e770b3e6cf
74 changed files with 9648 additions and 9816 deletions
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70
Test/baseResults/spv.test.vert.out
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@@ -7,7 +7,7 @@ Linked vertex stage:
// Module Version 99
// Generated by (magic number): 51a00bb
// Id's are bound by 28
// Id's are bound by 27
Source GLSL 130
Capability Shader
@@ -15,44 +15,42 @@ Linked vertex stage:
MemoryModel Logical GLSL450
EntryPoint Vertex 4 "main"
Name 4 "main"
Name 10 "uv"
Name 12 "uv_in"
Name 16 "gl_Position"
Name 19 "transform"
Name 22 "position"
Name 27 "gl_VertexID"
Decorate 10(uv) Smooth
Decorate 16(gl_Position) BuiltIn Position
Decorate 27(gl_VertexID) BuiltIn VertexId
Decorate 27(gl_VertexID) NoStaticUse
Name 9 "uv"
Name 11 "uv_in"
Name 15 "gl_Position"
Name 18 "transform"
Name 21 "position"
Name 26 "gl_VertexID"
Decorate 9(uv) Smooth
Decorate 15(gl_Position) BuiltIn Position
Decorate 26(gl_VertexID) BuiltIn VertexId
Decorate 26(gl_VertexID) NoStaticUse
2: TypeVoid
3: TypeFunction 2
7: TypeFloat 32
8: TypeVector 7(float) 2
9: TypePointer Output 8(fvec2)
10(uv): 9(ptr) Variable Output
11: TypePointer Input 8(fvec2)
12(uv_in): 11(ptr) Variable Input
14: TypeVector 7(float) 4
15: TypePointer Output 14(fvec4)
16(gl_Position): 15(ptr) Variable Output
17: TypeMatrix 14(fvec4) 4
18: TypePointer UniformConstant 17
19(transform): 18(ptr) Variable UniformConstant
21: TypePointer Input 14(fvec4)
22(position): 21(ptr) Variable Input
25: TypeInt 32 1
26: TypePointer Input 25(int)
27(gl_VertexID): 26(ptr) Variable Input
6: TypeFloat 32
7: TypeVector 6(float) 2
8: TypePointer Output 7(fvec2)
9(uv): 8(ptr) Variable Output
10: TypePointer Input 7(fvec2)
11(uv_in): 10(ptr) Variable Input
13: TypeVector 6(float) 4
14: TypePointer Output 13(fvec4)
15(gl_Position): 14(ptr) Variable Output
16: TypeMatrix 13(fvec4) 4
17: TypePointer UniformConstant 16
18(transform): 17(ptr) Variable UniformConstant
20: TypePointer Input 13(fvec4)
21(position): 20(ptr) Variable Input
24: TypeInt 32 1
25: TypePointer Input 24(int)
26(gl_VertexID): 25(ptr) Variable Input
4(main): 2 Function None 3
5: Label
13: 8(fvec2) Load 12(uv_in)
Store 10(uv) 13
20: 17 Load 19(transform)
23: 14(fvec4) Load 22(position)
24: 14(fvec4) MatrixTimesVector 20 23
Store 16(gl_Position) 24
Branch 6
6: Label
12: 7(fvec2) Load 11(uv_in)
Store 9(uv) 12
19: 16 Load 18(transform)
22: 13(fvec4) Load 21(position)
23: 13(fvec4) MatrixTimesVector 19 22
Store 15(gl_Position) 23
Return
FunctionEnd