profile: Avoid name collisions between instrumentation and runtime

The naming scheme we're using for counters in profile data shares a
prefix with some fixed names we use for the runtime, notably
__llvm_profile_data_begin and _end. Embarrassingly, this means a
function called begin() can't be instrumented.

This modifies the runtime names so as not to collide with the
instrumentation.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@217166 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 21 insertions, 2 deletions

diff --git a/test/profile/instrprof-basic.c b/test/profile/instrprof-basic.c
index 3db083140..2356fb73b 100644
--- a/test/profile/instrprof-basic.c
+++ b/test/profile/instrprof-basic.c
@@ -3,10 +3,29 @@
 // RUN: llvm-profdata merge -o %t.profdata %t.profraw
 // RUN: %clang_profuse=%t.profdata -o - -S -emit-llvm %s | FileCheck %s
 
-int main(int argc, const char *argv[]) {
+int begin(int i) {
   // CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof !1
+  if (i)
+    return 0;
+  return 1;
+}
+
+int end(int i) {
+  // CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof !2
+  if (i)
+    return 0;
+  return 1;
+}
+
+int main(int argc, const char *argv[]) {
+  begin(0);
+  end(1);
+
+  // CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof !2
   if (argc)
     return 0;
   return 1;
 }
-// CHECK: !1 = metadata !{metadata !"branch_weights", i32 2, i32 1}
+
+// CHECK: !1 = metadata !{metadata !"branch_weights", i32 1, i32 2}
+// CHECK: !2 = metadata !{metadata !"branch_weights", i32 2, i32 1}