[clang] [llvm] [RISCV] Add support for Smepmp 1.0 (PR #78489)

[Craig Topper via cfe-commits]

================
@@ -1047,6 +1048,14 @@
 // RUN: -o - | FileCheck --check-prefix=CHECK-SSAIA-EXT %s
 // CHECK-SSAIA-EXT: __riscv_ssaia  1000000{{$}}
 
+// RUN: %clang --target=riscv32 -menable-experimental-extensions \
+// RUN: -march=rv32ismepmp1p0 -x c -E -dM %s \
+// RUN: -o - | FileCheck --check-prefix=CHECK-SMEPMP-EXT %s
+// RUN: %clang --target=riscv64 -menable-experimental-extensions \
----------------
topperc wrote:

This extension shouldn't require `-menable-experimental-extensions`

https://github.com/llvm/llvm-project/pull/78489
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