Revert "[HIP] Use original file path for CUID" (llvm#108771)

Reverts llvm#107734

The test modified in this commit, hip-cuid-hash.hip is failing on MacOS:
- https://lab.llvm.org/buildbot/#/builders/190/builds/5764
- https://lab.llvm.org/buildbot/#/builders/23/builds/3020

Author: dyung

clang/lib/Driver/Driver.cpp

@@ -3034,7 +3034,10 @@ class OffloadingActionBuilder final {
           else if (UseCUID == CUID_Hash) {
             llvm::MD5 Hasher;
             llvm::MD5::MD5Result Hash;
-            Hasher.update(IA->getInputArg().getValue());
+            SmallString<256> RealPath;
+            llvm::sys::fs::real_path(IA->getInputArg().getValue(), RealPath,
+                                     /*expand_tilde=*/true);
+            Hasher.update(RealPath);
             for (auto *A : Args) {
               if (A->getOption().matches(options::OPT_INPUT))
                 continue;

clang/test/Driver/hip-cuid-hash.hip

@@ -1,15 +1,13 @@
 // 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:   Inputs/hip_multiple_inputs/a.cu >%t.out 2>&1
+// RUN:   %S/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:   Inputs/hip_multiple_inputs/a.cu >>%t.out 2>&1
+// RUN:   %S/Inputs/hip_multiple_inputs/a.cu >>%t.out 2>&1
 
 // RUN: FileCheck %s -check-prefixes=SAME -input-file %t.out
 
@@ -18,15 +16,15 @@
 
 // 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:   Inputs/hip_multiple_inputs/a.cu >%t.out 2>&1
+// RUN:   %S/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:   Inputs/../Inputs/hip_multiple_inputs/a.cu >>%t.out 2>&1
+// RUN:   %S/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:3c08c1ef86ef439d]]"
+// SAME: "-cc1"{{.*}} "-target-cpu" "gfx906" {{.*}}"-cuid=[[CUID:[0-9a-f]+]]"
 // SAME: "-cc1"{{.*}} "-target-cpu" "gfx906" {{.*}}"-cuid=[[CUID]]"
 
 // DIFF: "-cc1"{{.*}} "-target-cpu" "gfx906" {{.*}}"-cuid=[[CUID:[0-9a-f]+]]"