shader: Fold UnpackFloat2x16 and PackFloat2x16

Simplifies the code a bit when possible. These instructions should be no-ops codegen wise.
4 years ago · 8c9febe8f7
1 changed files with 4 additions and 0 deletions
--- a/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp
+++ b/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp
@ -476,6 +476,10 @@ void ConstantPropagation(IR::Block& block, IR::Inst& inst) {
        return FoldInverseFunc(inst, IR::Opcode::UnpackHalf2x16);
    case IR::Opcode::UnpackHalf2x16:
        return FoldInverseFunc(inst, IR::Opcode::PackHalf2x16);
+    case IR::Opcode::PackFloat2x16:
+        return FoldInverseFunc(inst, IR::Opcode::UnpackFloat2x16);
+    case IR::Opcode::UnpackFloat2x16:
+        return FoldInverseFunc(inst, IR::Opcode::PackFloat2x16);
    case IR::Opcode::SelectU1:
    case IR::Opcode::SelectU8:
    case IR::Opcode::SelectU16: