[GCOV] Add a test for function defined on one line (follow-up of https://reviews.llvm.org/D53600)

[calixte]

Summary

Add a test for coverage for function definition like void foo() { }.

[sfertile]

test/profile/Inputs/instrprof-gcov-one-line-function.c.gcov

1

The hard-coded path here won't pass on other machines, can you please update it?

[marco-c]

test/profile/Inputs/instrprof-gcov-one-line-function.c.gcov

1

Oops, I hadn't noticed it.

I've done it for Calixte in rCRT345656.

test/profile/Inputs/instrprof-gcov-one-line-function.c

+void foo() { }
+
+void bar() { }
+
+int main(void) {
+    foo();
+
+    bar();
+
+    return 0;
+}

test/profile/Inputs/instrprof-gcov-one-line-function.c.gcov

+// CHECK:        -:    0:Source:/home/calixte/dev/mozilla/llvm.cal/projects/compiler-rt/test/profile/Inputs/instrprof-gcov-one-line-function.c
+// CHECK-NEXT:        -:    0:Graph:instrprof-gcov-one-line-function.gcno
+// CHECK-NEXT:        -:    0:Data:instrprof-gcov-one-line-function.gcda
+// CHECK-NEXT:        -:    0:Runs:1
+// CHECK-NEXT:        -:    0:Programs:1
+// CHECK-NEXT:        1:    1:void foo() { }
+// CHECK-NEXT:        -:    2:
+// CHECK-NEXT:        1:    3:void bar() { }
+// CHECK-NEXT:        -:    4:
+// CHECK-NEXT:        1:    5:int main(void) {
+// CHECK-NEXT:        1:    6:    foo();
+// CHECK-NEXT:        -:    7:
+// CHECK-NEXT:        1:    8:    bar();
+// CHECK-NEXT:        -:    9:
+// CHECK-NEXT:        1:   10:    return 0;
+// CHECK-NEXT:        -:   11:}

test/profile/instrprof-gcov-one-line-function.test

+RUN: mkdir -p %t.d
+RUN: cd %t.d
+
+RUN: %clang --coverage -o %t %S/Inputs/instrprof-gcov-one-line-function.c
+RUN: test -f instrprof-gcov-one-line-function.gcno
+RUN: rm -f instrprof-gcov-one-line-function.gcda
+RUN: %run %t
+RUN: llvm-cov gcov instrprof-gcov-one-line-function.gcda
+RUN: FileCheck --match-full-lines --strict-whitespace --input-file instrprof-gcov-one-line-function.c.gcov %S/Inputs/instrprof-gcov-one-line-function.c.gcov