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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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84
Test/baseResults/spv.do-simple.vert.out
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@ -5,7 +5,7 @@ Linked vertex stage:
// Module Version 99
// Generated by (magic number): 51a00bb
// Id's are bound by 30
// Id's are bound by 29
Source ESSL 300
Capability Shader
@ -13,52 +13,50 @@ Linked vertex stage:
MemoryModel Logical GLSL450
EntryPoint Vertex 4 "main"
Name 4 "main"
Name 9 "i"
Name 28 "gl_VertexID"
Name 29 "gl_InstanceID"
Decorate 28(gl_VertexID) BuiltIn VertexId
Decorate 28(gl_VertexID) NoStaticUse
Decorate 29(gl_InstanceID) BuiltIn InstanceId
Decorate 29(gl_InstanceID) NoStaticUse
Name 8 "i"
Name 27 "gl_VertexID"
Name 28 "gl_InstanceID"
Decorate 27(gl_VertexID) BuiltIn VertexId
Decorate 27(gl_VertexID) NoStaticUse
Decorate 28(gl_InstanceID) BuiltIn InstanceId
Decorate 28(gl_InstanceID) NoStaticUse
2: TypeVoid
3: TypeFunction 2
7: TypeInt 32 1
8: TypePointer Function 7(int)
10: 7(int) Constant 0
15: TypeBool
16: 15(bool) ConstantTrue
20: 7(int) Constant 10
24: 7(int) Constant 1
26: 15(bool) ConstantFalse
27: TypePointer Input 7(int)
28(gl_VertexID): 27(ptr) Variable Input
29(gl_InstanceID): 27(ptr) Variable Input
6: TypeInt 32 1
7: TypePointer Function 6(int)
9: 6(int) Constant 0
14: TypeBool
15: 14(bool) ConstantTrue
19: 6(int) Constant 10
23: 6(int) Constant 1
25: 14(bool) ConstantFalse
26: TypePointer Input 6(int)
27(gl_VertexID): 26(ptr) Variable Input
28(gl_InstanceID): 26(ptr) Variable Input
4(main): 2 Function None 3
5: Label
9(i): 8(ptr) Variable Function
Store 9(i) 10
Branch 11
11: Label
14: 15(bool) Phi 16 5 26 13
LoopMerge 12 None
Branch 17
17: Label
SelectionMerge 13 None
BranchConditional 14 13 18
18: Label
19: 7(int) Load 9(i)
21: 15(bool) SLessThan 19 20
SelectionMerge 22 None
BranchConditional 21 22 12
22: Label
Branch 13
13: Label
23: 7(int) Load 9(i)
25: 7(int) IAdd 23 24
Store 9(i) 25
Branch 11
8(i): 7(ptr) Variable Function
Store 8(i) 9
Branch 10
10: Label
13: 14(bool) Phi 15 5 25 12
LoopMerge 11 None
Branch 16
16: Label
SelectionMerge 12 None
BranchConditional 13 12 17
17: Label
18: 6(int) Load 8(i)
20: 14(bool) SLessThan 18 19
SelectionMerge 21 None
BranchConditional 20 21 11
21: Label
Branch 12
12: Label
Branch 6
6: Label
22: 6(int) Load 8(i)
24: 6(int) IAdd 22 23
Store 8(i) 24
Branch 10
11: Label
Return
FunctionEnd