================
@@ -5330,11 +5330,13 @@ static uint32_t
getIdentityValueFor32BitWaveReduction(unsigned Opc) {
case AMDGPU::S_MAX_U32:
return std::numeric_limits<uint32_t>::min();
case AMDGPU::S_MAX_I32:
+ case AMDGPU::V_SUB_F32_e64: // +0.0
----------------
jmmartinez wrote:
I haven't thought about this, but why do we take `-0.0` if the reduction is a
sub and `+0.0` if it is an add ? Does it come from any specification ?
https://github.com/llvm/llvm-project/pull/161815
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