[clang] [llvm] [RISCV] Added the MIPS prefetch extensions for MIPS RV64 P8700. (PR #145647)

[Min-Yih Hsu via cfe-commits]

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@@ -0,0 +1,32 @@
+; RUN: llc -mtriple=riscv32 -mattr=+xmipscbop -mattr=+m -verify-machineinstrs < %s \
+; RUN:   | FileCheck %s -check-prefix=RV32XMIPSPREFETCH
+; RUN: llc -mtriple=riscv64 -mattr=+xmipscbop -mattr=+m -verify-machineinstrs < %s \
+; RUN:   | FileCheck %s -check-prefix=RV64XMIPSPREFETCH
+
+define void @prefetch_read(ptr noundef %ptr) nounwind {
+; RV32XMIPSPREFETCH-LABEL: prefetch_read:
+; RV32XMIPSPREFETCH:    mips.pref       8, 1(a0)
+;
+; RV64XMIPSPREFETCH-LABEL: prefetch_read:
+; RV64XMIPSPREFETCH:    mips.pref       8, 1(a0)
+entry:
+  %arrayidx = getelementptr inbounds nuw i8, ptr %ptr, i64 1
+  tail call void @llvm.prefetch.p0(ptr nonnull %arrayidx, i32 0, i32 0, i32 1)
+  ret void
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mshockwave wrote:

duplicate line

https://github.com/llvm/llvm-project/pull/145647