[clang] [llvm] [PowerPC] Add support for -mcpu=pwr11 / -mtune=pwr11 (PR #99511)

[Chen Zheng via cfe-commits]

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@@ -3485,9 +3485,11 @@ unsigned PPCInstrInfo::getSpillTarget() const {
   // With P10, we may need to spill paired vector registers or accumulator
   // registers. MMA implies paired vectors, so we can just check that.
   bool IsP10Variant = Subtarget.isISA3_1() || Subtarget.pairedVectorMemops();
-  return Subtarget.isISAFuture() ? 3 : IsP10Variant ?
-                                   2 : Subtarget.hasP9Vector() ?
-                                   1 : 0;
+  // P11 uses the P10 target.
+  return Subtarget.isISAFuture()   ? 3
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chenzheng1030 wrote:

nit: is this formatted by clang-format? Maybe we should not change these lines as you are not changing them.

https://github.com/llvm/llvm-project/pull/99511