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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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100
Test/baseResults/spv.dataOutIndirect.vert.out
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@ -8,7 +8,7 @@ Linked vertex stage:
// Module Version 99
// Generated by (magic number): 51a00bb
// Id's are bound by 39
// Id's are bound by 38
Source GLSL 130
Capability Shader
@ -16,60 +16,58 @@ Linked vertex stage:
MemoryModel Logical GLSL450
EntryPoint Vertex 4 "main"
Name 4 "main"
Name 9 "i"
Name 24 "colorOut"
Name 27 "color"
Name 33 "gl_Position"
Name 38 "gl_VertexID"
Decorate 24(colorOut) Smooth
Decorate 33(gl_Position) BuiltIn Position
Decorate 38(gl_VertexID) BuiltIn VertexId
Decorate 38(gl_VertexID) NoStaticUse
Name 8 "i"
Name 23 "colorOut"
Name 26 "color"
Name 32 "gl_Position"
Name 37 "gl_VertexID"
Decorate 23(colorOut) Smooth
Decorate 32(gl_Position) BuiltIn Position
Decorate 37(gl_VertexID) BuiltIn VertexId
Decorate 37(gl_VertexID) NoStaticUse
2: TypeVoid
3: TypeFunction 2
7: TypeInt 32 1
8: TypePointer Function 7(int)
10: 7(int) Constant 1
15: 7(int) Constant 5
16: TypeBool
18: TypeFloat 32
19: TypeVector 18(float) 4
20: TypeInt 32 0
21: 20(int) Constant 6
22: TypeArray 19(fvec4) 21
23: TypePointer Output 22
24(colorOut): 23(ptr) Variable Output
26: TypePointer Input 19(fvec4)
27(color): 26(ptr) Variable Input
29: TypePointer Output 19(fvec4)
33(gl_Position): 29(ptr) Variable Output
34: 7(int) Constant 2
37: TypePointer Input 7(int)
38(gl_VertexID): 37(ptr) Variable Input
6: TypeInt 32 1
7: TypePointer Function 6(int)
9: 6(int) Constant 1
14: 6(int) Constant 5
15: TypeBool
17: TypeFloat 32
18: TypeVector 17(float) 4
19: TypeInt 32 0
20: 19(int) Constant 6
21: TypeArray 18(fvec4) 20
22: TypePointer Output 21
23(colorOut): 22(ptr) Variable Output
25: TypePointer Input 18(fvec4)
26(color): 25(ptr) Variable Input
28: TypePointer Output 18(fvec4)
32(gl_Position): 28(ptr) Variable Output
33: 6(int) Constant 2
36: TypePointer Input 6(int)
37(gl_VertexID): 36(ptr) Variable Input
4(main): 2 Function None 3
5: Label
9(i): 8(ptr) Variable Function
Store 9(i) 10
Branch 11
8(i): 7(ptr) Variable Function
Store 8(i) 9
Branch 10
10: Label
13: 6(int) Load 8(i)
16: 15(bool) SLessThan 13 14
LoopMerge 11 None
BranchConditional 16 12 11
12: Label
24: 6(int) Load 8(i)
27: 18(fvec4) Load 26(color)
29: 28(ptr) AccessChain 23(colorOut) 24
Store 29 27
30: 6(int) Load 8(i)
31: 6(int) IAdd 30 9
Store 8(i) 31
Branch 10
11: Label
14: 7(int) Load 9(i)
17: 16(bool) SLessThan 14 15
LoopMerge 12 None
BranchConditional 17 13 12
13: Label
25: 7(int) Load 9(i)
28: 19(fvec4) Load 27(color)
30: 29(ptr) AccessChain 24(colorOut) 25
Store 30 28
31: 7(int) Load 9(i)
32: 7(int) IAdd 31 10
Store 9(i) 32
Branch 11
12: Label
35: 29(ptr) AccessChain 24(colorOut) 34
36: 19(fvec4) Load 35
Store 33(gl_Position) 36
Branch 6
6: Label
34: 28(ptr) AccessChain 23(colorOut) 33
35: 18(fvec4) Load 34
Store 32(gl_Position) 35
Return
FunctionEnd