Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/compiler-rt/test/profile/Linux/counter_promo_nest.c

@@ -0,0 +1,48 @@
+// RUN: rm -fr %t.promo.prof
+// RUN: rm -fr %t.nopromo.prof
+// RUN: %clang_pgogen=%t.promo.prof/ -o %t.promo.gen -O2 %s
+// RUN: %clang_pgogen=%t.promo.prof/ -o %t.promo.gen.ll -emit-llvm -S -O2 %s
+// RUN: cat %t.promo.gen.ll | FileCheck --check-prefix=PROMO %s
+// RUN: %run %t.promo.gen
+// RUN: llvm-profdata merge -o %t.promo.profdata %t.promo.prof/
+// RUN: llvm-profdata show --counts --all-functions %t.promo.profdata  > %t.promo.dump
+// RUN: %clang_pgogen=%t.nopromo.prof/ -mllvm -do-counter-promotion=false -o %t.nopromo.gen -O2 %s
+// RUN: %run %t.nopromo.gen
+// RUN: llvm-profdata merge -o %t.nopromo.profdata %t.nopromo.prof/
+// RUN: llvm-profdata show --counts --all-functions %t.nopromo.profdata  > %t.nopromo.dump
+// RUN: diff %t.promo.profdata %t.nopromo.profdata
+int g;
+__attribute__((noinline)) void bar() {
+ g++;
+}
+
+extern int printf(const char*,...);
+
+int c = 10;
+
+int main()
+// PROMO-LABEL: @main
+// PROMO: load{{.*}}@__profc_main{{.*}}
+// PROMO-NEXT: add
+// PROMO-NEXT: store{{.*}}@__profc_main{{.*}}
+// PROMO-NEXT: load{{.*}}@__profc_main{{.*}}
+// PROMO-NEXT: add
+// PROMO-NEXT: store{{.*}}@__profc_main{{.*}}
+{
+  int i, j, k;
+
+  g = 0;
+  for (i = 0; i < c; i++)
+    for (j = 0; j < c; j++)
+       for (k = 0; k < c; k++)
+           bar();
+
+  for (i = 0; i < c; i++)
+    for (j = 0; j < 10*c;j++)
+        bar();
+
+  for (i = 0; i < 100*c; i++)
+    bar();
+
+  return 0;
+}