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Improved fix for buffer reference constants

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This is an alternate fix for the issue described in commit be63facd, whose
solution didn't work if there were non-trivial operations involved in computing
a constant initializer which caused the 'constant unfolding' code to kick in
(addConstantReferenceConversion). Instead, this change does the 'unfolding'
later in createSpvConstantFromConstUnionArray. If a reference-type constant has
survived that long, then folding is already done, this must be a 'real' (inside
a function) use of the constant, and it should be safe to unfold and apply the
bitcast.
This commit is contained in:
Jeff Bolz 2019-03-05 23:27:09 -06:00
parent 79d25ea0ce
commit 3fd1232665
6 changed files with 75 additions and 75 deletions
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4
SPIRV/GlslangToSpv.cpp
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@ -7705,6 +7705,10 @@ spv::Id TGlslangToSpvTraverser::createSpvConstantFromConstUnionArray(const glsla
case glslang::EbtBool:
scalar = builder.makeBoolConstant(zero ? false : consts[nextConst].getBConst(), specConstant);
break;
case glslang::EbtReference:
scalar = builder.makeUint64Constant(zero ? 0 : consts[nextConst].getU64Const(), specConstant);
scalar = builder.createUnaryOp(spv::OpBitcast, typeId, scalar);
break;
default:
assert(0);
break;