[clang] [llvm] [AArch64] Add support for intent to read prefetch intrinsic (PR #179709)

[Jonathan Thackray via cfe-commits]

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@@ -115,6 +115,7 @@ __swp(uint32_t __x, volatile uint32_t *__p) {
 #else
 #define __plix(cache_level, retention_policy, addr) \
   __builtin_arm_prefetch(addr, 0, cache_level, retention_policy, 0)
+#define __pldir(addr) __builtin_arm_prefetch_ir(addr)
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jthackray wrote:

Is this unrated, or should it require `+pcdphint`? (see my other comment)

https://github.com/llvm/llvm-project/pull/179709