spirv-opt: Folding rules for negation and cancellation #6452
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This change extends the negation cancellation added in KhronosGroup#6444 to also cancel negation for OpFDiv, OpSDiv and OpVectorTimesScalar. Additionally adding the following constant folding rules: * x - x = 0 * x / x = 1 * x / -x = -1 * -x / x = -1 `(x * (1 / x)) = 1` was already in place, but direct division was overlooked.
s-perron
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luciechoi and
s-perron
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s-perron
luciechoi
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Dec 22, 2025
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This change extends the negation cancellation added in #6444 to also cancel negation for OpFDiv, OpSDiv and OpVectorTimesScalar.
Additionally adding the following constant folding rules:
(x * (1 / x)) = 1was already in place, but direct division was overlooked.