[llvm] [AMDGPU] Switch V_CNDMASK operands to shrink it into VOP2 (PR #135162)

[Mirko Brkušanin via llvm-commits]

================
@@ -871,25 +871,41 @@ unsigned SIShrinkInstructions::getInverseCompareOpcode(MachineInstr &MI) const {
     return AMDGPU::V_CMP_EQ_F32_e64;
   case AMDGPU::V_CMP_GE_F32_e64:
     return AMDGPU::V_CMP_NGE_F32_e64;
+  case AMDGPU::V_CMP_NGE_F32_e64:
+    return AMDGPU::V_CMP_GE_F32_e64;
   case AMDGPU::V_CMP_LE_F32_e64:
     return AMDGPU::V_CMP_NLE_F32_e64;
+  case AMDGPU::V_CMP_NLE_F32_e32:
+    return AMDGPU::V_CMP_LE_F32_e32;
   case AMDGPU::V_CMP_GT_F32_e64:
     return AMDGPU::V_CMP_NGT_F32_e64;
+  case AMDGPU::V_CMP_NGT_F32_e64:
+    return AMDGPU::V_CMP_GT_F32_e64;
   case AMDGPU::V_CMP_LT_F32_e64:
     return AMDGPU::V_CMP_NLT_F32_e64;
+  case AMDGPU::V_CMP_NLT_F32_e64:
+    return AMDGPU::V_CMP_LT_F32_e64;
   // float 64
   case AMDGPU::V_CMP_EQ_F64_e64:
     return AMDGPU::V_CMP_NEQ_F64_e64;
   case AMDGPU::V_CMP_NEQ_F64_e64:
     return AMDGPU::V_CMP_EQ_F64_e64;
   case AMDGPU::V_CMP_GE_F64_e64:
     return AMDGPU::V_CMP_NGE_F64_e64;
+  case AMDGPU::V_CMP_NGE_F64_e64:
+    return AMDGPU::V_CMP_GE_F32_e64;
   case AMDGPU::V_CMP_LE_F64_e64:
     return AMDGPU::V_CMP_NLE_F64_e64;
+  case AMDGPU::V_CMP_NLE_F64_e32:
+    return AMDGPU::V_CMP_LE_F64_e32;
   case AMDGPU::V_CMP_GT_F64_e64:
     return AMDGPU::V_CMP_NGT_F64_e64;
+  case AMDGPU::V_CMP_NGT_F64_e64:
+    return AMDGPU::V_CMP_GT_F32_e64;
   case AMDGPU::V_CMP_LT_F64_e64:
     return AMDGPU::V_CMP_NLT_F64_e64;
+  case AMDGPU::V_CMP_NLT_F64_e64:
+    return AMDGPU::V_CMP_LT_F64_e64;
----------------
mbrkusanin wrote:

Missing:
V_CMP_LG_F*
V_CMP_NLG_F*
V_CMP_O_F*
V_CMP_U_F*

https://github.com/llvm/llvm-project/pull/135162