[clang] [HIP] Use original file path for CUID (PR #107734)

[Yaxun Liu via cfe-commits]

https://github.com/yxsamliu created https://github.com/llvm/llvm-project/pull/107734

to avoid being nondeterministic due to random path in distributed build.

>From 725953ccbdb1f57eaac234cf5729f64a9fdbce13 Mon Sep 17 00:00:00 2001
From: "Yaxun (Sam) Liu" <yaxun.liu at amd.com>
Date: Sat, 7 Sep 2024 20:32:48 -0400
Subject: [PATCH] [HIP] Use original file path for CUID

to avoid being nondeterministic due to random path
in distributed build.
---
 clang/lib/Driver/Driver.cpp         |  5 +----
 clang/test/Driver/hip-cuid-hash.hip | 12 +++++++-----
 2 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 5b3783e20eabba..6a25ca4de137b6 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -3040,10 +3040,7 @@ class OffloadingActionBuilder final {
           else if (UseCUID == CUID_Hash) {
             llvm::MD5 Hasher;
             llvm::MD5::MD5Result Hash;
-            SmallString<256> RealPath;
-            llvm::sys::fs::real_path(IA->getInputArg().getValue(), RealPath,
-                                     /*expand_tilde=*/true);
-            Hasher.update(RealPath);
+            Hasher.update(IA->getInputArg().getValue());
             for (auto *A : Args) {
               if (A->getOption().matches(options::OPT_INPUT))
                 continue;
diff --git a/clang/test/Driver/hip-cuid-hash.hip b/clang/test/Driver/hip-cuid-hash.hip
index 103a1cbf26d50a..6987a98470c6c7 100644
--- a/clang/test/Driver/hip-cuid-hash.hip
+++ b/clang/test/Driver/hip-cuid-hash.hip
@@ -1,13 +1,15 @@
 // Check CUID generated by hash.
 // The same CUID is generated for the same file with the same options.
 
+// RUN: cd %S
+
 // RUN: %clang -### -x hip --target=x86_64-unknown-linux-gnu --no-offload-new-driver \
 // RUN:   --offload-arch=gfx906 -c -nogpuinc -nogpulib -fuse-cuid=hash \
-// RUN:   %S/Inputs/hip_multiple_inputs/a.cu >%t.out 2>&1
+// RUN:   Inputs/hip_multiple_inputs/a.cu >%t.out 2>&1
 
 // RUN: %clang -### -x hip --target=x86_64-unknown-linux-gnu --no-offload-new-driver \
 // RUN:   --offload-arch=gfx906 -c -nogpuinc -nogpulib -fuse-cuid=hash \
-// RUN:   %S/Inputs/hip_multiple_inputs/a.cu >>%t.out 2>&1
+// RUN:   Inputs/hip_multiple_inputs/a.cu >>%t.out 2>&1
 
 // RUN: FileCheck %s -check-prefixes=SAME -input-file %t.out
 
@@ -16,15 +18,15 @@
 
 // RUN: %clang -### -x hip --target=x86_64-unknown-linux-gnu -DX=1 --no-offload-new-driver \
 // RUN:   --offload-arch=gfx906 -c -nogpuinc -nogpulib -fuse-cuid=hash \
-// RUN:   %S/Inputs/hip_multiple_inputs/a.cu >%t.out 2>&1
+// RUN:   Inputs/hip_multiple_inputs/a.cu >%t.out 2>&1
 
 // RUN: %clang -### -x hip --target=x86_64-unknown-linux-gnu -DX=2 --no-offload-new-driver \
 // RUN:   --offload-arch=gfx906 -c -nogpuinc -nogpulib -fuse-cuid=hash \
-// RUN:   %S/Inputs/../Inputs/hip_multiple_inputs/a.cu >>%t.out 2>&1
+// RUN:   Inputs/../Inputs/hip_multiple_inputs/a.cu >>%t.out 2>&1
 
 // RUN: FileCheck %s -check-prefixes=DIFF -input-file %t.out
 
-// SAME: "-cc1"{{.*}} "-target-cpu" "gfx906" {{.*}}"-cuid=[[CUID:[0-9a-f]+]]"
+// SAME: "-cc1"{{.*}} "-target-cpu" "gfx906" {{.*}}"-cuid=[[CUID:3c08c1ef86ef439d]]"
 // SAME: "-cc1"{{.*}} "-target-cpu" "gfx906" {{.*}}"-cuid=[[CUID]]"
 
 // DIFF: "-cc1"{{.*}} "-target-cpu" "gfx906" {{.*}}"-cuid=[[CUID:[0-9a-f]+]]"