[compiler-rt] [clang] [clang-tools-extra] [PGO] Exposing PGO's Counter Reset and File Dumping APIs (PR #76471)

[Qiongsi Wu via cfe-commits]

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@@ -0,0 +1,17 @@
+// RUN: %clang_pgogen -o %t %s
+// RUN: not %t
+// RUN: %clang -o %t %s
+// RUN: %t
+
+__attribute__((weak)) void __llvm_profile_reset_counters(void);
+
+__attribute__((noinline)) int bar() { return 4; }
+int foo() {
+  if (__llvm_profile_reset_counters) {
+    __llvm_profile_reset_counters();
+    return 0;
+  }
+  return bar();
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qiongsiwu wrote:

Ah good point! I think neither `foo` or `bar` is necessary. The code is simplified. 

https://github.com/llvm/llvm-project/pull/76471