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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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8
Test/baseResults/spv.double.comp.out
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@@ -57,7 +57,7 @@ Linked compute stage:
25: TypeVector 24(int) 3
26: TypePointer Input 25(ivec3)
27(gl_GlobalInvocationID): 26(ptr) Variable Input
29: TypeVector 24(int) 2
28: TypeVector 24(int) 2
32: TypePointer Function 8(float)
34(gl_LocalInvocationID): 26(ptr) Variable Input
38: 12(int) Constant 8
@@ -86,12 +86,12 @@ Linked compute stage:
Store 16 14
20: 19(ptr) AccessChain 11(bufInst) 17
Store 20 18
28: 25(ivec3) Load 27(gl_GlobalInvocationID)
30: 29(ivec2) VectorShuffle 28 28 0 1
29: 25(ivec3) Load 27(gl_GlobalInvocationID)
30: 28(ivec2) VectorShuffle 29 29 0 1
31: 21(ivec2) Bitcast 30
Store 23(storePos) 31
35: 25(ivec3) Load 34(gl_LocalInvocationID)
36: 29(ivec2) VectorShuffle 35 35 0 1
36: 28(ivec2) VectorShuffle 35 35 0 1
37: 21(ivec2) Bitcast 36
39: 21(ivec2) CompositeConstruct 38 38
40: 21(ivec2) ISub 37 39