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Skip identity conversions for 8-bit and 16-bit types (#3622)

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[BugFix] Do not generate any conversion for 8-bit and 16-bit types if it is an identity conversion.
Earlier (before this fix), it generated incorrect SPIR-V convert instructions, as SPIR-V
requires that the types being converted differ.
This commit is contained in:
RP Singh 2024-06-21 02:04:59 +05:30 committed by GitHub
parent 68a17eb721
commit a05c4eca74
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GPG Key ID: B5690EEEBB952194
1 changed files with 11 additions and 5 deletions
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16
glslang/MachineIndependent/ParseHelper.cpp
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@ -4,6 +4,7 @@
// Copyright (C) 2015-2018 Google, Inc.
// Copyright (C) 2017, 2019 ARM Limited.
// Modifications Copyright (C) 2020 Advanced Micro Devices, Inc. All rights reserved.
// Modifications Copyright (C) 2024 Ravi Prakash Singh.
//
// All rights reserved.
//
@ -8540,7 +8541,8 @@ TIntermTyped* TParseContext::constructBuiltIn(const TType& type, TOperator op, T
basicOp = EOpConstructFloat16;
// 8/16-bit storage extensions don't support constructing composites of 8/16-bit types,
// so construct a 32-bit type and convert
if (!intermediate.getArithemeticFloat16Enabled()) {
// and do not generate any conversion if it is an identity conversion, i.e. float16_t(<float16_t> var)
if (!intermediate.getArithemeticFloat16Enabled() && (node->getBasicType() != EbtFloat16)) {
TType tempType(EbtFloat, EvqTemporary, type.getVectorSize());
newNode = node;
if (tempType != newNode->getType()) {
@ -8563,7 +8565,8 @@ TIntermTyped* TParseContext::constructBuiltIn(const TType& type, TOperator op, T
basicOp = EOpConstructInt8;
// 8/16-bit storage extensions don't support constructing composites of 8/16-bit types,
// so construct a 32-bit type and convert
if (!intermediate.getArithemeticInt8Enabled()) {
// and do not generate any conversion if it is an identity conversion, i.e. int8_t(<int8_t> var)
if (!intermediate.getArithemeticInt8Enabled() && (node->getBasicType() != EbtInt8)) {
TType tempType(EbtInt, EvqTemporary, type.getVectorSize());
newNode = node;
if (tempType != newNode->getType()) {
@ -8586,7 +8589,8 @@ TIntermTyped* TParseContext::constructBuiltIn(const TType& type, TOperator op, T
basicOp = EOpConstructUint8;
// 8/16-bit storage extensions don't support constructing composites of 8/16-bit types,
// so construct a 32-bit type and convert
if (!intermediate.getArithemeticInt8Enabled()) {
// and do not generate any conversion if it is an identity conversion, i.e. uint8_t(<uint8_t> var)
if (!intermediate.getArithemeticInt8Enabled() && (node->getBasicType() != EbtUint8)) {
TType tempType(EbtUint, EvqTemporary, type.getVectorSize());
newNode = node;
if (tempType != newNode->getType()) {
@ -8609,7 +8613,8 @@ TIntermTyped* TParseContext::constructBuiltIn(const TType& type, TOperator op, T
basicOp = EOpConstructInt16;
// 8/16-bit storage extensions don't support constructing composites of 8/16-bit types,
// so construct a 32-bit type and convert
if (!intermediate.getArithemeticInt16Enabled()) {
// and do not generate any conversion if it is an identity conversion, i.e. int16_t(<int16_t> var)
if (!intermediate.getArithemeticInt16Enabled() && (node->getBasicType() != EbtInt16)) {
TType tempType(EbtInt, EvqTemporary, type.getVectorSize());
newNode = node;
if (tempType != newNode->getType()) {
@ -8632,7 +8637,8 @@ TIntermTyped* TParseContext::constructBuiltIn(const TType& type, TOperator op, T
basicOp = EOpConstructUint16;
// 8/16-bit storage extensions don't support constructing composites of 8/16-bit types,
// so construct a 32-bit type and convert
if (!intermediate.getArithemeticInt16Enabled()) {
// and do not generate any conversion if it is an identity conversion, i.e. uint16_t(<uint16_t> var)
if (!intermediate.getArithemeticInt16Enabled() && (node->getBasicType() != EbtUint16)) {
TType tempType(EbtUint, EvqTemporary, type.getVectorSize());
newNode = node;
if (tempType != newNode->getType()) {