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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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158
Test/baseResults/spv.for-continue-break.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 49
// Id's are bound by 48
Source ESSL 300
Capability Shader
@ -13,89 +13,87 @@ Linked vertex stage:
MemoryModel Logical GLSL450
EntryPoint Vertex 4 "main"
Name 4 "main"
Name 9 "i"
Name 18 "A"
Name 26 "B"
Name 30 "C"
Name 37 "D"
Name 39 "E"
Name 40 "F"
Name 44 "G"
Name 47 "gl_VertexID"
Name 48 "gl_InstanceID"
Decorate 47(gl_VertexID) BuiltIn VertexId
Decorate 47(gl_VertexID) NoStaticUse
Decorate 48(gl_InstanceID) BuiltIn InstanceId
Decorate 48(gl_InstanceID) NoStaticUse
Name 8 "i"
Name 17 "A"
Name 25 "B"
Name 29 "C"
Name 36 "D"
Name 38 "E"
Name 39 "F"
Name 43 "G"
Name 46 "gl_VertexID"
Name 47 "gl_InstanceID"
Decorate 46(gl_VertexID) BuiltIn VertexId
Decorate 46(gl_VertexID) NoStaticUse
Decorate 47(gl_InstanceID) BuiltIn InstanceId
Decorate 47(gl_InstanceID) NoStaticUse
2: TypeVoid
3: TypeFunction 2
7: TypeInt 32 1
8: TypePointer Function 7(int)
10: 7(int) Constant 0
15: 7(int) Constant 10
16: TypeBool
19: 7(int) Constant 1
21: 7(int) Constant 2
32: 7(int) Constant 3
41: 7(int) Constant 12
45: 7(int) Constant 99
46: TypePointer Input 7(int)
47(gl_VertexID): 46(ptr) Variable Input
48(gl_InstanceID): 46(ptr) Variable Input
6: TypeInt 32 1
7: TypePointer Function 6(int)
9: 6(int) Constant 0
14: 6(int) Constant 10
15: TypeBool
18: 6(int) Constant 1
20: 6(int) Constant 2
31: 6(int) Constant 3
40: 6(int) Constant 12
44: 6(int) Constant 99
45: TypePointer Input 6(int)
46(gl_VertexID): 45(ptr) Variable Input
47(gl_InstanceID): 45(ptr) Variable Input
4(main): 2 Function None 3
5: Label
9(i): 8(ptr) Variable Function
18(A): 8(ptr) Variable Function
26(B): 8(ptr) Variable Function
30(C): 8(ptr) Variable Function
37(D): 8(ptr) Variable Function
39(E): 8(ptr) Variable Function
40(F): 8(ptr) Variable Function
44(G): 8(ptr) Variable Function
Store 9(i) 10
Branch 11
11: Label
14: 7(int) Load 9(i)
17: 16(bool) SLessThan 14 15
LoopMerge 12 None
BranchConditional 17 13 12
13: Label
Store 18(A) 19
20: 7(int) Load 9(i)
22: 7(int) SMod 20 21
23: 16(bool) IEqual 22 10
SelectionMerge 25 None
BranchConditional 23 24 25
24: Label
Store 26(B) 19
27: 7(int) Load 9(i)
28: 7(int) IAdd 27 19
Store 9(i) 28
8(i): 7(ptr) Variable Function
17(A): 7(ptr) Variable Function
25(B): 7(ptr) Variable Function
29(C): 7(ptr) Variable Function
36(D): 7(ptr) Variable Function
38(E): 7(ptr) Variable Function
39(F): 7(ptr) Variable Function
43(G): 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
Store 17(A) 18
19: 6(int) Load 8(i)
21: 6(int) SMod 19 20
22: 15(bool) IEqual 21 9
SelectionMerge 24 None
BranchConditional 22 23 24
23: Label
Store 25(B) 18
26: 6(int) Load 8(i)
27: 6(int) IAdd 26 18
Store 8(i) 27
Branch 10
28: Label
Store 29(C) 18
Branch 24
24: Label
30: 6(int) Load 8(i)
32: 6(int) SMod 30 31
33: 15(bool) IEqual 32 9
SelectionMerge 35 None
BranchConditional 33 34 35
34: Label
Store 36(D) 18
Branch 11
29: Label
Store 30(C) 19
Branch 25
25: Label
31: 7(int) Load 9(i)
33: 7(int) SMod 31 32
34: 16(bool) IEqual 33 10
SelectionMerge 36 None
BranchConditional 34 35 36
35: Label
Store 37(D) 19
Branch 12
38: Label
Store 39(E) 19
Branch 36
36: Label
Store 40(F) 41
42: 7(int) Load 9(i)
43: 7(int) IAdd 42 19
Store 9(i) 43
Branch 11
12: Label
Store 44(G) 45
Branch 6
6: Label
37: Label
Store 38(E) 18
Branch 35
35: Label
Store 39(F) 40
41: 6(int) Load 8(i)
42: 6(int) IAdd 41 18
Store 8(i) 42
Branch 10
11: Label
Store 43(G) 44
Return
FunctionEnd