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SPV: Reduce spurious type generation by removing intermediate types in the middle of access chains.

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This generally simplifies access chain generation, with far fewer  type conversions.
It is particularly important to future SPIR-V changes where there is less aggregate
type uniqueness due to carrying different layout information with the type.
This commit is contained in:
John Kessenich
2015-09-13 14:46:30 -06:00
parent c9a808319a
commit fa668dad99
8 changed files with 144 additions and 137 deletions
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12
Test/baseResults/spv.forLoop.frag.out
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@@ -58,7 +58,7 @@ Linked fragment stage:
50: TypePointer UniformConstant 49(ivec4)
51(v4): 50(ptr) Variable UniformConstant
71: 48(int) Constant 4
86: TypeVector 7(float) 3
85: TypeVector 7(float) 3
97: TypePointer Input 7(float)
98(f): 97(ptr) Variable Input
116: 14(int) Constant 16
@@ -145,8 +145,8 @@ Linked fragment stage:
82: 8(fvec4) Load 36(gl_FragColor)
83: 8(fvec4) FAdd 82 81
Store 36(gl_FragColor) 83
85: 8(fvec4) Load 12(BaseColor)
87: 86(fvec3) VectorShuffle 85 85 0 1 2
86: 8(fvec4) Load 12(BaseColor)
87: 85(fvec3) VectorShuffle 86 86 0 1 2
88: 8(fvec4) Load 84(r)
89: 8(fvec4) VectorShuffle 88 87 4 5 6 3
Store 84(r) 89
@@ -169,10 +169,10 @@ Linked fragment stage:
Branch 91
92: Label
104: 8(fvec4) Load 84(r)
105: 86(fvec3) VectorShuffle 104 104 0 1 2
105: 85(fvec3) VectorShuffle 104 104 0 1 2
106: 8(fvec4) Load 36(gl_FragColor)
107: 86(fvec3) VectorShuffle 106 106 0 1 2
108: 86(fvec3) FAdd 107 105
107: 85(fvec3) VectorShuffle 106 106 0 1 2
108: 85(fvec3) FAdd 107 105
109: 8(fvec4) Load 36(gl_FragColor)
110: 8(fvec4) VectorShuffle 109 108 4 5 6 3
Store 36(gl_FragColor) 110