InstrProf: Only disable coverage in built-in macros, not all system macros

The issue I was trying to solve in r236547 was about built-in macros,
but I disabled coverage in all system macros. This is actually a bit
of overkill, and makes the display of coverage around system macros
degrade unnecessarily. Instead, limit this to builtins specifically.

llvm-svn: 237397

1 files changed, 24 insertions, 0 deletions

diff --git a/clang/test/CoverageMapping/system_macro.c b/clang/test/CoverageMapping/system_macro.c
new file mode 100644
index 00000000000..b0ce360005a
--- /dev/null
+++ b/clang/test/CoverageMapping/system_macro.c
@@ -0,0 +1,24 @@
+// RUN: %clang_cc1 -fprofile-instr-generate -fcoverage-mapping -dump-coverage-mapping -emit-llvm-only -main-file-name system_macro.c -o - %s | FileCheck %s
+
+#ifdef IS_SYSHEADER
+
+#pragma clang system_header
+#define Func(x) if (x) {}
+#define SomeType int
+
+#else
+
+#define IS_SYSHEADER
+#include __FILE__
+
+// CHECK-LABEL: doSomething:
+void doSomething(int x) { // CHECK: File 0, [[@LINE]]:25 -> {{[0-9:]+}} = #0
+  Func(x); // CHECK: Expansion,File 0, [[@LINE]]:3 -> [[@LINE]]:7
+  return;
+  // CHECK: Expansion,File 0, [[@LINE+1]]:3 -> [[@LINE+1]]:11
+  SomeType *f; // CHECK: File 0, [[@LINE]]:11 -> {{[0-9:]+}} = 0
+}
+
+int main() {}
+
+#endif