[clang] [Clang][InstrProf] Allow mix-up of absolute path with relative path on command line when using -fprofile-list= (PR #67519)

[Shivam Gupta via cfe-commits]

https://github.com/xgupta updated https://github.com/llvm/llvm-project/pull/67519

>From a7f4b08b54350ebbe4b115214a84669eb69aee3e Mon Sep 17 00:00:00 2001
From: Shivam Gupta <shivam98.tkg at gmail.com>
Date: Thu, 19 Oct 2023 18:20:05 +0530
Subject: [PATCH] [Clang][InstrProf] Allow absolute path in fun.list of
 -fprofile-list=

---
 clang/lib/Basic/ProfileList.cpp     | 9 +++++++++
 clang/test/CodeGen/profile-filter.c | 3 +++
 2 files changed, 12 insertions(+)

diff --git a/clang/lib/Basic/ProfileList.cpp b/clang/lib/Basic/ProfileList.cpp
index 8fa16e2eb069a52..3dc01096a69e2ef 100644
--- a/clang/lib/Basic/ProfileList.cpp
+++ b/clang/lib/Basic/ProfileList.cpp
@@ -146,5 +146,14 @@ ProfileList::isFileExcluded(StringRef FileName,
     return Forbid;
   if (SCL->inSection(Section, "src", FileName))
     return Allow;
+  // Convert the input file path to its canonical (absolute) form
+  llvm::SmallString<128> CanonicalFileName(FileName);
+  llvm::sys::fs::make_absolute(CanonicalFileName);
+  if (auto V = inSection(Section, "source", CanonicalFileName))
+    return V;
+  if (SCL->inSection(Section, "!src", CanonicalFileName))
+    return Forbid;
+  if (SCL->inSection(Section, "src", CanonicalFileName))
+    return Allow;
   return std::nullopt;
 }
diff --git a/clang/test/CodeGen/profile-filter.c b/clang/test/CodeGen/profile-filter.c
index e33e4a0a60b3d4f..86ee79c04747101 100644
--- a/clang/test/CodeGen/profile-filter.c
+++ b/clang/test/CodeGen/profile-filter.c
@@ -6,6 +6,9 @@
 // RUN: echo "src:%s" | sed -e 's/\\/\\\\/g' > %t-file.list
 // RUN: %clang_cc1 -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping -fprofile-list=%t-file.list -emit-llvm %s -o - | FileCheck %s --check-prefix=FILE
 
+// RUN: cd %S
+// RUN: %clang_cc1 -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping -fprofile-list=%t-file.list -emit-llvm profile-filter.c -o - | FileCheck %s --check-prefix=FILE
+
 // RUN: echo -e "[clang]\nfun:test1\n[llvm]\nfun:test2" > %t-section.list
 // RUN: %clang_cc1 -fprofile-instrument=llvm -fprofile-list=%t-section.list -emit-llvm %s -o - | FileCheck %s --check-prefix=SECTION