[Coverage] Add a test case for comdat

The binary contains two (merged) covmap sections which
have duplicate CovMapRecords from comdat (template instantation).
This test makes sure the reader reads it properly. It also
tests that the coverage data from different instantiations
of the same template function are properly merged in show
output.

llvm-svn: 258376

4 files changed, 29 insertions, 0 deletions

diff --git a/llvm/test/tools/llvm-cov/Inputs/elf_binary_comdat b/llvm/test/tools/llvm-cov/Inputs/elf_binary_comdat
new file mode 100755
index 00000000000..b5ce4b5a35f
--- /dev/null
+++ b/llvm/test/tools/llvm-cov/Inputs/elf_binary_comdat
diff --git a/llvm/test/tools/llvm-cov/Inputs/elf_binary_comdat.profdata b/llvm/test/tools/llvm-cov/Inputs/elf_binary_comdat.profdata
new file mode 100644
index 00000000000..85667041e2c
--- /dev/null
+++ b/llvm/test/tools/llvm-cov/Inputs/elf_binary_comdat.profdata
diff --git a/llvm/test/tools/llvm-cov/Inputs/instrprof-comdat.h b/llvm/test/tools/llvm-cov/Inputs/instrprof-comdat.h
new file mode 100644
index 00000000000..e1227167cd4
--- /dev/null
+++ b/llvm/test/tools/llvm-cov/Inputs/instrprof-comdat.h
@@ -0,0 +1,19 @@
+template <class T> class FOO {
+public:
+  FOO() : t(0) {}
+
+  T DoIt(T ti);
+
+private:
+  T t;
+};
+
+template <class T> T FOO<T>::DoIt(T ti) { // HEADER:  2| [[@LINE]]|template
+  for (T I = 0; I < ti; I++) {            // HEADER: 22| [[@LINE]]|  for (T
+    t += I;                               // HEADER: 20| [[@LINE]]|    t += I;
+    if (I > ti / 2)                       // HEADER: 20| [[@LINE]]|    if (I > ti 
+      t -= 1;                             // HEADER:  8| [[@LINE]]|      t -= 1;
+  }                                       // HEADER: 10| [[@LINE]]|  }
+                                          // HEADER:  1| [[@LINE]]|
+  return t;                               // HEADER:  1| [[@LINE]]|  return t;
+}
diff --git a/llvm/test/tools/llvm-cov/cov-comdat.test b/llvm/test/tools/llvm-cov/cov-comdat.test
new file mode 100644
index 00000000000..f44434c0c22
--- /dev/null
+++ b/llvm/test/tools/llvm-cov/cov-comdat.test
@@ -0,0 +1,10 @@
+REQUIRES: shell
+
+# The binary contains two (merged) covmap sections which
+# have duplicate CovMapRecords from comdat (template instantation).
+# This test makes sure the reader reads it properly. It also
+# tests that the coverage data from different instantiations
+# of the same template function are properly merged in show
+# output.
+
+// RUN: llvm-cov show %S/Inputs/elf_binary_comdat -instr-profile %S/Inputs/elf_binary_comdat.profdata -filename-equivalence %S/Inputs/instrprof-comdat.h | FileCheck --check-prefix=HEADER %S/Inputs/instrprof-comdat.h