[llvm] [X86] Support -march=pantherlake,clearwaterforest (PR #69277)

[Freddy Ye via llvm-commits]

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@@ -2538,6 +2544,9 @@
 // CHECK_SRF_M32: #define __PCONFIG__ 1
 // CHECK_SRF_M32: #define __PKU__ 1
 // CHECK_SRF_M32: #define __POPCNT__ 1
+// CHECK_SRF_M32-NOT: #define __PREFETCHI__ 1
+// CHECK_ARLS_M32-NOT: #define __PREFETCHI__ 1
+// CHECK_PTL_M32: #define __PREFETCHI__ 1
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FreddyLeaf wrote:

clearwaterforest also includes CHECK_PTL_M32, so it's ok not to add here.

https://github.com/llvm/llvm-project/pull/69277