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HLSL: allow self-type cast (as no-op passthrough)

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Previously, casting an object of a struct type to an identical type
would produce an error.  This PR allows this case.

As a side-effect of the change, several self-type casts in existing
tests go away.  For example:

    0:10          Construct float ( temp float)
    0:10            'f' ( in float)

becomes this (without the unneeded constructor op):

    0:10          'f' ( in float)

For vector or array types this can result in somewhat less overall code.

Fixes: #1218
This commit is contained in:
LoopDawg 2018-05-17 13:03:12 -06:00
parent ebec909487
commit c59916710e
6 changed files with 205 additions and 48 deletions
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6
Test/baseResults/hlsl.shapeConv.frag.out
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@ -40,8 +40,7 @@ gl_FragCoord origin is upper left
0:10 move second child to first child ( temp 3-component vector of float)
0:10 'u' ( temp 3-component vector of float)
0:10 Construct vec3 ( temp 3-component vector of float)
0:10 Construct float ( temp float)
0:10 'f' ( in float)
0:10 'f' ( in float)
0:11 Sequence
0:11 move second child to first child ( temp 2-component vector of float)
0:11 'w' ( temp 2-component vector of float)
@ -203,8 +202,7 @@ gl_FragCoord origin is upper left
0:10 move second child to first child ( temp 3-component vector of float)
0:10 'u' ( temp 3-component vector of float)
0:10 Construct vec3 ( temp 3-component vector of float)
0:10 Construct float ( temp float)
0:10 'f' ( in float)
0:10 'f' ( in float)
0:11 Sequence
0:11 move second child to first child ( temp 2-component vector of float)
0:11 'w' ( temp 2-component vector of float)