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| author | Fernando S <fsahmkow27@gmail.com> | 2022-01-03 00:39:59 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-01-03 00:39:59 +0100 |
| commit | ae7da0b12dd8aef115d741eb60d00ddf8ed357df (patch) | |
| tree | 09d269fe3838d1f8aa5672d2af06cbeb9b45d81f /src/shader_recompiler/ir_opt/constant_propagation_pass.cpp | |
| parent | 214b9fc9a7749784915dad37f734e03b1db9912b (diff) | |
| parent | 8c907c620d830bdaef30ff4316489443775b3ea4 (diff) | |
Merge pull request #7629 from ameerj/nv-driver-fixes
shaders: Add fixes for NVIDIA drivers 495+
Diffstat (limited to 'src/shader_recompiler/ir_opt/constant_propagation_pass.cpp')
| -rw-r--r-- | src/shader_recompiler/ir_opt/constant_propagation_pass.cpp | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp b/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp index d089fdd12f..c134a12bc6 100644 --- a/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp +++ b/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp @@ -505,6 +505,29 @@ void FoldBitCast(IR::Inst& inst, IR::Opcode reverse) { return; } } + if constexpr (op == IR::Opcode::BitCastU32F32) { + // Workaround for new NVIDIA driver bug, where: + // uint attr = ftou(itof(gl_InstanceID)); + // always returned 0. + // We can instead manually optimize this and work around the driver bug: + // uint attr = uint(gl_InstanceID); + if (arg_inst->GetOpcode() == IR::Opcode::GetAttribute) { + const IR::Attribute attr{arg_inst->Arg(0).Attribute()}; + switch (attr) { + case IR::Attribute::PrimitiveId: + case IR::Attribute::InstanceId: + case IR::Attribute::VertexId: + break; + default: + return; + } + // Replace the bitcasts with an integer attribute get + inst.ReplaceOpcode(IR::Opcode::GetAttributeU32); + inst.SetArg(0, arg_inst->Arg(0)); + inst.SetArg(1, arg_inst->Arg(1)); + return; + } + } } void FoldInverseFunc(IR::Inst& inst, IR::Opcode reverse) { |