[llvm-cov] Drop the longest common filename prefix from summaries

Remove the longest common prefix from filenames when printing coverage
summaries. This makes them easier to compare.

llvm-svn: 280895

3 files changed, 28 insertions, 0 deletions

diff --git a/llvm/test/tools/llvm-cov/Inputs/multiple-files.covmapping b/llvm/test/tools/llvm-cov/Inputs/multiple-files.covmapping
new file mode 100644
index 00000000000..f8af44a7456
--- /dev/null
+++ b/llvm/test/tools/llvm-cov/Inputs/multiple-files.covmapping
diff --git a/llvm/test/tools/llvm-cov/Inputs/multiple-files.proftext b/llvm/test/tools/llvm-cov/Inputs/multiple-files.proftext
new file mode 100644
index 00000000000..1be93b71b77
--- /dev/null
+++ b/llvm/test/tools/llvm-cov/Inputs/multiple-files.proftext
@@ -0,0 +1,19 @@
+f1
+0x0
+1
+1
+
+f2
+0x0
+1
+1
+
+f3
+0x0
+1
+1
+
+f4
+0x0
+1
+1
diff --git a/llvm/test/tools/llvm-cov/multiple-files.test b/llvm/test/tools/llvm-cov/multiple-files.test
new file mode 100644
index 00000000000..0b3fb855fed
--- /dev/null
+++ b/llvm/test/tools/llvm-cov/multiple-files.test
@@ -0,0 +1,9 @@
+// RUN: llvm-profdata merge %S/Inputs/multiple-files.proftext -o %t.profdata
+// RUN: llvm-cov report %S/Inputs/multiple-files.covmapping -instr-profile %t.profdata | FileCheck %s
+
+// CHECK: Filename
+// CHECK-NEXT: ---
+// CHECK-NEXT: {{^}}a{{[/\\]}}f2.c
+// CHECK-NEXT: {{^}}b{{[/\\]}}c{{[/\\]}}f4.c
+// CHECK-NEXT: {{^}}b{{[/\\]}}f3.c
+// CHECK-NEXT: {{^}}f1.c