[clang] [llvm] [Clang][RISCV][P-ext] Add Packed Widening Multiply Accumulate intrinsics (PR #226505)

[Craig Topper via cfe-commits]

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@@ -9682,3 +9682,76 @@ int32x2_t test_pslide1down_i32x2(int32x2_t rd, int32_t rs1) {
 uint32x2_t test_pslide1down_u32x2(uint32x2_t rd, uint32_t rs1) {
   return __riscv_pslide1down_u32x2(rd, rs1);
 }
+
+/* Packed Widening Multiply Accumulate */
+// RV32-LABEL: define dso_local i64 @test_pwmacc_i32x2(
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topperc wrote:

Pleae rerun the script on this. We have a common `CHECK` prefix now that RV32 and RV64 can share.

https://github.com/llvm/llvm-project/pull/226505