Fix back-branch target for do-while loops.
To ensure back branches always go to a header block, create a header block even for !testFirst loops. Then unify common code between the testFirst/!testFirst cases. Generate the header-block code first, so update golden files. Realize that certain infinite loops generate invalid SPIR-V, so put a TODO to instead abort code generation in such cases. Change-Id: I1e173c8f73daad186cfc666b7d72bd563ed7665d
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20 changed files with 2062 additions and 2029 deletions
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@ -48,26 +48,26 @@ Linked vertex stage:
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5: Label
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8(i): 7(ptr) Variable Function
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Store 8(i) 9
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Branch 13
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Branch 10
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10: Label
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25: 6(int) Load 8(i)
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28: 19(fvec4) Load 27(color)
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30: 29(ptr) AccessChain 24(colorOut) 25
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Store 30 28
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Branch 12
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11: Label
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14: 6(int) Load 8(i)
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17: 16(bool) SLessThan 14 15
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LoopMerge 12 13 None
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BranchConditional 17 11 12
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11: Label
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25: 6(int) Load 8(i)
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28: 19(fvec4) Load 27(color)
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30: 29(ptr) AccessChain 24(colorOut) 25
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Store 30 28
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Branch 13
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12: Label
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35: 29(ptr) AccessChain 24(colorOut) 34
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36: 19(fvec4) Load 35
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Store 33(gl_Position) 36
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Return
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12: Label
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13: Label
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31: 6(int) Load 8(i)
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32: 6(int) IAdd 31 9
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Store 8(i) 32
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Branch 13
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13: Label
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14: 6(int) Load 8(i)
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17: 16(bool) SLessThan 14 15
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LoopMerge 11 12 None
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BranchConditional 17 10 11
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FunctionEnd
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Branch 10
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FunctionEnd
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