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

[Phoebe Wang via llvm-commits]

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@@ -2628,6 +2647,9 @@
 // CHECK_SRF_M64: #define __PCONFIG__ 1
 // CHECK_SRF_M64: #define __PKU__ 1
 // CHECK_SRF_M64: #define __POPCNT__ 1
+// CHECK_SRF_M64-NOT: #define __PREFETCHI__ 1
+// CHECK_ARLS_M64-NOT: #define __PREFETCHI__ 1
+// CHECK_PTL_M64: #define __PREFETCHI__ 1
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phoebewang wrote:

Missing `CHECK_CWF_M64`?

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