[clang] [llvm] [X86] Remove AMX-TRANSPOSE (PR #165556)

[Evgenii Kudriashov via llvm-commits]

================
@@ -268,18 +268,14 @@ void X86FastPreTileConfig::reload(MachineBasicBlock::iterator UseMI,
 }
 
 static unsigned getTileDefNum(MachineRegisterInfo *MRI, Register Reg) {
-  if (Reg.isVirtual()) {
-    unsigned RegClassID = MRI->getRegClass(Reg)->getID();
-    if (RegClassID == X86::TILERegClassID)
-      return 1;
-    if (RegClassID == X86::TILEPAIRRegClassID)
-      return 2;
-  } else {
-    if (Reg >= X86::TMM0 && Reg <= X86::TMM7)
-      return 1;
-    if (Reg >= X86::TMM0_TMM1 && Reg <= X86::TMM6_TMM7)
-      return 2;
+  if (Reg.isVirtual() &&
+      (MRI->getRegClass(Reg)->getID() == X86::TILERegClassID)) {
+    return 1;
   }
+
+  if (Reg >= X86::TMM0 && Reg <= X86::TMM7)
+    return 1;
+
   return 0;
 }
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e-kud wrote:

Can we inline this function into `isTileRegister`? Maybe it makes sense to extract this function to a common place to use it in `llvm/lib/Target/X86/X86FastTileConfig.cpp` and `llvm/lib/Target/X86/X86FastPreTileConfig.cpp`

https://github.com/llvm/llvm-project/pull/165556