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HLSL: implement [unroll] and [loop] attributes

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This adds infrastructure suitable for any front end to create SPIR-V loop
control flags.  The only current front end doing so is HLSL.

[unroll] turns into spv::LoopControlUnrollMask
[loop] turns into spv::LoopControlDontUnrollMask
no specification means spv::LoopControlMaskNone
This commit is contained in:
steve-lunarg 2017-05-02 20:14:50 -06:00
parent de1cc06c1d
commit f1709e7146
17 changed files with 334 additions and 17 deletions
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14
hlsl/hlslParseHelper.cpp
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@ -7568,6 +7568,20 @@ bool HlslParseContext::handleOutputGeometry(const TSourceLoc& loc, const TLayout
return true;
}
//
// Loop hints
//
TLoopControl HlslParseContext::handleLoopControl(const TAttributeMap& attributes) const
{
if (attributes.contains(EatUnroll))
return ELoopControlUnroll;
else if (attributes.contains(EatLoop))
return ELoopControlDontUnroll;
else
return ELoopControlNone;
}
//
// Updating default qualifier for the case of a declaration with just a qualifier,
// no type, block, or identifier.