diff --git a/clang/test/CodeGenHLSL/disable_opt.hlsl b/clang/test/CodeGenHLSL/disable_opt.hlsl
--- a/clang/test/CodeGenHLSL/disable_opt.hlsl
+++ b/clang/test/CodeGenHLSL/disable_opt.hlsl
@@ -1,5 +1,5 @@
-// RUN: %clang -cc1 -S -triple dxil-pc-shadermodel6.3-library -O0 -emit-llvm -xhlsl  -o - %s | FileCheck %s
-// RUN: %clang -cc1 -S -triple dxil-pc-shadermodel6.3-library -O3 -emit-llvm -xhlsl  -o - %s | FileCheck %s --check-prefix=OPT
+// RUN: %clang_cc1 -S -triple dxil-pc-shadermodel6.3-library -O0 -emit-llvm -xhlsl  -o - %s | FileCheck %s
+// RUN: %clang_cc1 -S -triple dxil-pc-shadermodel6.3-library -O3 -emit-llvm -xhlsl  -o - %s | FileCheck %s --check-prefix=OPT
 
 // CHECK:!"dx.disable_optimizations", i32 1}
 
diff --git a/clang/test/CodeGenHLSL/validator_version.hlsl b/clang/test/CodeGenHLSL/validator_version.hlsl
--- a/clang/test/CodeGenHLSL/validator_version.hlsl
+++ b/clang/test/CodeGenHLSL/validator_version.hlsl
@@ -1,8 +1,8 @@
-// RUN: %clang -cc1 -S -triple dxil-pc-shadermodel6.3-library -S -emit-llvm -xhlsl -validator-version 1.1 -o - %s | FileCheck %s
+// RUN: %clang_cc1 -S -triple dxil-pc-shadermodel6.3-library -S -emit-llvm -xhlsl -validator-version 1.1 -o - %s | FileCheck %s
 
 // FIXME:The following line should work once SPIR-V support for HLSL is added.
 // See: https://github.com/llvm/llvm-project/issues/57877
-// DISABLED: %clang -cc1 -S -triple spirv32 -S -emit-llvm -xhlsl -validator-version 1.1 -o - %s | FileCheck %s --check-prefix=NOT_DXIL
+// DISABLED: %clang_cc1 -S -triple spirv32 -S -emit-llvm -xhlsl -validator-version 1.1 -o - %s | FileCheck %s --check-prefix=NOT_DXIL
 
 // CHECK:!dx.valver = !{![[valver:[0-9]+]]}
 // CHECK:![[valver]] = !{i32 1, i32 1}
diff --git a/clang/test/Driver/debug-options.c b/clang/test/Driver/debug-options.c
--- a/clang/test/Driver/debug-options.c
+++ b/clang/test/Driver/debug-options.c
@@ -400,9 +400,9 @@
 // GEXTREFS: "-dwarf-ext-refs" "-fmodule-format=obj"
 // GEXTREFS: "-debug-info-kind={{standalone|constructor}}"
 
-// RUN: not %clang -cc1 -debug-info-kind=watkind 2>&1 | FileCheck -check-prefix=BADSTRING1 %s
+// RUN: not %clang_cc1 -debug-info-kind=watkind 2>&1 | FileCheck -check-prefix=BADSTRING1 %s
 // BADSTRING1: error: invalid value 'watkind' in '-debug-info-kind=watkind'
-// RUN: not %clang -cc1 -debugger-tuning=gmodal 2>&1 | FileCheck -check-prefix=BADSTRING2 %s
+// RUN: not %clang_cc1 -debugger-tuning=gmodal 2>&1 | FileCheck -check-prefix=BADSTRING2 %s
 // BADSTRING2: error: invalid value 'gmodal' in '-debugger-tuning=gmodal'
 
 // RUN: %clang -### -fdebug-macro    %s 2>&1 | FileCheck -check-prefix=MACRO %s
diff --git a/clang/test/Driver/hlsl-entry.cpp b/clang/test/Driver/hlsl-entry.cpp
--- a/clang/test/Driver/hlsl-entry.cpp
+++ b/clang/test/Driver/hlsl-entry.cpp
@@ -1,3 +1,3 @@
-// RUN:not %clang -cc1 -triple dxil-pc-shadermodel6.3-compute -x c++ -hlsl-entry foo  %s  2>&1 | FileCheck %s --check-prefix=NOTHLSL
+// RUN:not %clang_cc1 -triple dxil-pc-shadermodel6.3-compute -x c++ -hlsl-entry foo  %s  2>&1 | FileCheck %s --check-prefix=NOTHLSL
 
 // NOTHLSL:invalid argument '-hlsl-entry' not allowed with 'C++'
diff --git a/clang/test/Driver/hlsl_no_stdinc.hlsl b/clang/test/Driver/hlsl_no_stdinc.hlsl
--- a/clang/test/Driver/hlsl_no_stdinc.hlsl
+++ b/clang/test/Driver/hlsl_no_stdinc.hlsl
@@ -3,7 +3,7 @@
 // RUN: %clang_dxc  -Tlib_6_7 -hlsl-no-stdinc -fcgl -Fo - %s -### 2>&1 | FileCheck %s --check-prefix=NOSTDINC
 // RUN: %clang -target dxil-pc-shadermodel6.3-library -nostdinc -o - %s -### 2>&1 | FileCheck %s --check-prefix=NOSTDINC
 
-// RUN: %clang -cc1 -triple dxil-pc-shadermodel6.3-library -x hlsl -ast-dump -o - %s -verify
+// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.3-library -x hlsl -ast-dump -o - %s -verify
 
 // Make sure hlsl-no-stdinc is translated into finclude-default-header.
 // STDINC:"-finclude-default-header"
diff --git a/clang/test/Driver/linker-wrapper-image.c b/clang/test/Driver/linker-wrapper-image.c
--- a/clang/test/Driver/linker-wrapper-image.c
+++ b/clang/test/Driver/linker-wrapper-image.c
@@ -3,7 +3,7 @@
 // REQUIRES: amdgpu-registered-target
 
 // RUN: clang-offload-packager -o %t.out --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o \
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o \
 // RUN:   -fembed-offload-object=%t.out
 // RUN: clang-linker-wrapper --print-wrapped-module --dry-run --host-triple=x86_64-unknown-linux-gnu \
 // RUN:   --linker-path=/usr/bin/ld -- %t.o -o a.out 2>&1 | FileCheck %s --check-prefix=OPENMP
@@ -30,7 +30,7 @@
 // OPENMP-NEXT: }
 
 // RUN: clang-offload-packager -o %t.out --image=file=%S/Inputs/dummy-elf.o,kind=cuda,triple=nvptx64-nvidia-cuda,arch=sm_70
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o \
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o \
 // RUN:   -fembed-offload-object=%t.out
 // RUN: clang-linker-wrapper --print-wrapped-module --dry-run --host-triple=x86_64-unknown-linux-gnu \
 // RUN:   --linker-path=/usr/bin/ld -- %t.o -o a.out 2>&1 | FileCheck %s --check-prefix=CUDA
@@ -112,7 +112,7 @@
 // CUDA-NEXT: }
 
 // RUN: clang-offload-packager -o %t.out --image=file=%S/Inputs/dummy-elf.o,kind=hip,triple=amdgcn-amd-amdhsa,arch=gfx908
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o \
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o \
 // RUN:   -fembed-offload-object=%t.out
 // RUN: clang-linker-wrapper --print-wrapped-module --dry-run --host-triple=x86_64-unknown-linux-gnu \
 // RUN:   -linker-path /usr/bin/ld -- %t.o -o a.out 2>&1 | FileCheck %s --check-prefix=HIP
diff --git a/clang/test/Driver/linker-wrapper.c b/clang/test/Driver/linker-wrapper.c
--- a/clang/test/Driver/linker-wrapper.c
+++ b/clang/test/Driver/linker-wrapper.c
@@ -5,7 +5,7 @@
 // RUN: clang-offload-packager -o %t.out \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70 \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t.out
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t.out
 // RUN: clang-linker-wrapper --host-triple=x86_64-unknown-linux-gnu --dry-run \
 // RUN:   --linker-path=/usr/bin/ld -- %t.o -o a.out 2>&1 | FileCheck %s --check-prefix=NVPTX_LINK
 
@@ -14,7 +14,7 @@
 // RUN: clang-offload-packager -o %t.out \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70 \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-llvm-bc -o %t.o -fembed-offload-object=%t.out
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-llvm-bc -o %t.o -fembed-offload-object=%t.out
 // RUN: clang-linker-wrapper --host-triple=x86_64-unknown-linux-gnu --dry-run \
 // RUN:   --linker-path=/usr/bin/ld -- %t.o -o a.out 2>&1 | FileCheck %s --check-prefix=HOST_BC
 
@@ -23,7 +23,7 @@
 // RUN: clang-offload-packager -o %t.out \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70 \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t.out
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t.out
 // RUN: clang-linker-wrapper --host-triple=x86_64-unknown-linux-gnu --dry-run --device-debug -O0 \
 // RUN:   --linker-path=/usr/bin/ld -- %t.o -o a.out 2>&1 | FileCheck %s --check-prefix=NVPTX-LINK-DEBUG
 
@@ -32,7 +32,7 @@
 // RUN: clang-offload-packager -o %t.out \
 // RUN:   --image=file=%S/Inputs/dummy-bc.bc,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70 \
 // RUN:   --image=file=%S/Inputs/dummy-bc.bc,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t.out
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t.out
 // RUN: clang-linker-wrapper --host-triple=x86_64-unknown-linux-gnu --dry-run --device-debug -O2 \
 // RUN:   --linker-path=/usr/bin/ld -- %t.o -o a.out 2>&1 | FileCheck %s --check-prefix=NVPTX-LINK-DEBUG-LTO
 
@@ -41,7 +41,7 @@
 // RUN: clang-offload-packager -o %t.out \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=amdgcn-amd-amdhsa,arch=gfx908 \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=amdgcn-amd-amdhsa,arch=gfx908
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t.out
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t.out
 // RUN: clang-linker-wrapper --host-triple=x86_64-unknown-linux-gnu --dry-run \
 // RUN:   --linker-path=/usr/bin/ld -- %t.o -o a.out 2>&1 | FileCheck %s --check-prefix=AMDGPU_LINK
 
@@ -50,13 +50,13 @@
 // RUN: clang-offload-packager -o %t.out \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=x86_64-unknown-linux-gnu \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=x86_64-unknown-linux-gnu
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t.out
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t.out
 // RUN: clang-linker-wrapper --host-triple=x86_64-unknown-linux-gnu --dry-run \
 // RUN:   --linker-path=/usr/bin/ld.lld -- %t.o -o a.out 2>&1 | FileCheck %s --check-prefix=CPU_LINK
 
 // CPU_LINK: ld.lld{{.*}}-m elf_x86_64 -shared -Bsymbolic -o {{.*}}.out {{.*}}.o {{.*}}.o
 
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o
 // RUN: clang-linker-wrapper --dry-run --host-triple=x86_64-unknown-linux-gnu -mllvm -openmp-opt-disable \
 // RUN:   --linker-path=/usr/bin/ld.lld -- -a -b -c %t.o -o a.out 2>&1 | FileCheck %s --check-prefix=HOST_LINK
 
@@ -66,7 +66,7 @@
 // RUN: clang-offload-packager -o %t.out \
 // RUN:   --image=file=%S/Inputs/dummy-bc.bc,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70 \
 // RUN:   --image=file=%S/Inputs/dummy-bc.bc,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t.out
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t.out
 // RUN: clang-linker-wrapper --host-triple=x86_64-unknown-linux-gnu --dry-run \
 // RUN:   --linker-path=/usr/bin/ld -- %t.o -o a.out 2>&1 | FileCheck %s --check-prefix=LTO
 
@@ -76,7 +76,7 @@
 // RUN: clang-offload-packager -o %t.out \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70 \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=cuda,triple=nvptx64-nvidia-cuda,arch=sm_70
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t.out
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t.out
 // RUN: clang-linker-wrapper --host-triple=x86_64-unknown-linux-gnu --dry-run \
 // RUN:   --linker-path=/usr/bin/ld -- %t.o -o a.out 2>&1 | FileCheck %s --check-prefix=CUDA_OMP_LINK
 
@@ -85,11 +85,11 @@
 // RUN: clang-offload-packager -o %t-lib.out \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70 \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=cuda,triple=nvptx64-nvidia-cuda,arch=sm_52
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t-lib.out
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t-lib.out
 // RUN: llvm-ar rcs %t.a %t.o
 // RUN: clang-offload-packager -o %t.out \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t-obj.o -fembed-offload-object=%t.out
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t-obj.o -fembed-offload-object=%t.out
 // RUN: clang-linker-wrapper --host-triple=x86_64-unknown-linux-gnu --dry-run \
 // RUN:   --linker-path=/usr/bin/ld -- %t.a %t-obj.o -o a.out 2>&1 | FileCheck %s --check-prefix=STATIC-LIBRARY
 
@@ -100,7 +100,7 @@
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=cuda,triple=nvptx64-nvidia-cuda,arch=sm_70 \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70 \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=cuda,triple=nvptx64-nvidia-cuda,arch=sm_52
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o \
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o \
 // RUN:   -fembed-offload-object=%t.out
 // RUN: clang-linker-wrapper --dry-run --host-triple=x86_64-unknown-linux-gnu \
 // RUN: --linker-path=/usr/bin/ld -- %t.o -o a.out 2>&1 | FileCheck %s --check-prefix=CUDA
@@ -113,7 +113,7 @@
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=hip,triple=amdgcn-amd-amdhsa,arch=gfx90a \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=amdgcn-amd-amdhsa,arch=gfx90a \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=hip,triple=amdgcn-amd-amdhsa,arch=gfx908
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o \
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o \
 // RUN:   -fembed-offload-object=%t.out
 // RUN: clang-linker-wrapper --dry-run --host-triple=x86_64-unknown-linux-gnu -linker-path \
 // RUN:   /usr/bin/ld -- %t.o -o a.out 2>&1 | FileCheck %s --check-prefix=HIP
@@ -125,7 +125,7 @@
 // RUN: clang-offload-packager -o %t.out \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=amdgcn-amd-amdhsa,arch=gfx908 \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o \
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o \
 // RUN:   -fembed-offload-object=%t.out
 // RUN: clang-linker-wrapper --dry-run --host-triple=x86_64-unknown-linux-gnu \
 // RUN:   --linker-path=/usr/bin/ld --device-linker=a --device-linker=nvptx64-nvidia-cuda=b -- \
@@ -138,10 +138,10 @@
 // RUN: clang-offload-packager -o %t-lib.out \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70 \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=cuda,triple=nvptx64-nvidia-cuda,arch=sm_52
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t-lib.out
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t-lib.out
 // RUN: llvm-ar rcs %t.a %t.o
 // RUN: rm -f %t.o
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t-obj.o
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t-obj.o
 // RUN: clang-linker-wrapper --host-triple=x86_64-unknown-linux-gnu --dry-run -save-temps \
 // RUN:   --linker-path=/usr/bin/ld -- %t.a %t-obj.o -o a.out
 // RUN: not ls *-device-*
diff --git a/clang/test/Driver/lit.local.cfg b/clang/test/Driver/lit.local.cfg
--- a/clang/test/Driver/lit.local.cfg
+++ b/clang/test/Driver/lit.local.cfg
@@ -2,10 +2,6 @@
 
 config.suffixes = ['.c', '.cpp', '.h', '.m', '.mm', '.S', '.s', '.f90', '.F90', '.f95',
                    '.cu', '.rs', '.cl', '.clcpp', '.hip', '.hlsl']
-config.substitutions = list(config.substitutions)
-config.substitutions.insert(0,
-    ('%clang_cc1',
-     """*** Do not use 'clang -cc1' in Driver tests. ***""") )
 
 # Remove harmful environmental variables for clang Driver tests.
 # Some might be useful for other tests so they are only removed here.
diff --git a/clang/test/Driver/offload-packager.c b/clang/test/Driver/offload-packager.c
--- a/clang/test/Driver/offload-packager.c
+++ b/clang/test/Driver/offload-packager.c
@@ -34,7 +34,7 @@
 // RUN: clang-offload-packager -o %t.out \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=amdgcn-amd-amdhsa,arch=gfx908 \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t.out
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o -fembed-offload-object=%t.out
 // RUN: clang-offload-packager %t.out \
 // RUN:   --image=file=%t-sm_70.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70 \
 // RUN:   --image=file=%t-gfx908.o,kind=openmp,triple=amdgcn-amd-amdhsa,arch=gfx908
@@ -45,7 +45,7 @@
 // RUN: clang-offload-packager -o %t.out \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=amdgcn-amd-amdhsa,arch=gfx908 \
 // RUN:   --image=file=%S/Inputs/dummy-elf.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70
-// RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-llvm -o %t.bc -fembed-offload-object=%t.out
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-llvm -o %t.bc -fembed-offload-object=%t.out
 // RUN: clang-offload-packager %t.out \
 // RUN:   --image=file=%t-sm_70.o,kind=openmp,triple=nvptx64-nvidia-cuda,arch=sm_70 \
 // RUN:   --image=file=%t-gfx908.o,kind=openmp,triple=amdgcn-amd-amdhsa,arch=gfx908
diff --git a/clang/test/Driver/reloc-model.c b/clang/test/Driver/reloc-model.c
--- a/clang/test/Driver/reloc-model.c
+++ b/clang/test/Driver/reloc-model.c
@@ -1,4 +1,4 @@
-// RUN: not %clang -cc1 -mrelocation-model tinkywinky \
+// RUN: not %clang_cc1 -mrelocation-model tinkywinky \
 // RUN: -emit-llvm %s 2>&1 | FileCheck -check-prefix CHECK-INVALID %s
 
 // CHECK-INVALID: error: invalid value 'tinkywinky' in '-mrelocation-model tinkywinky'
diff --git a/clang/test/Driver/riscv-features.c b/clang/test/Driver/riscv-features.c
--- a/clang/test/Driver/riscv-features.c
+++ b/clang/test/Driver/riscv-features.c
@@ -32,7 +32,7 @@
 // DEFAULT-LINUX-SAME: "-target-feature" "+d"
 // DEFAULT-LINUX-SAME: "-target-feature" "+c"
 
-// RUN: not %clang -cc1 -triple riscv64-unknown-elf -target-feature +e 2>&1 | FileCheck %s -check-prefix=RV64-WITH-E
+// RUN: not %clang_cc1 -triple riscv64-unknown-elf -target-feature +e 2>&1 | FileCheck %s -check-prefix=RV64-WITH-E
 
 // RV64-WITH-E: error: invalid feature combination: standard user-level extension 'e' requires 'rv32'
 
diff --git a/clang/test/Frontend/plugin-attribute.cpp b/clang/test/Frontend/plugin-attribute.cpp
--- a/clang/test/Frontend/plugin-attribute.cpp
+++ b/clang/test/Frontend/plugin-attribute.cpp
@@ -1,5 +1,5 @@
 // RUN: split-file %s %t
-// RUN: %clang -cc1 -load %llvmshlibdir/Attribute%pluginext -fsyntax-only -ast-dump -verify %t/good_attr.cpp | FileCheck %s
+// RUN: %clang_cc1 -load %llvmshlibdir/Attribute%pluginext -fsyntax-only -ast-dump -verify %t/good_attr.cpp | FileCheck %s
 // RUN: %clang -fplugin=%llvmshlibdir/Attribute%pluginext -fsyntax-only -Xclang -verify %t/bad_attr.cpp
 // REQUIRES: plugins, examples
 //--- good_attr.cpp
diff --git a/clang/test/InterfaceStubs/externstatic.c b/clang/test/InterfaceStubs/externstatic.c
--- a/clang/test/InterfaceStubs/externstatic.c
+++ b/clang/test/InterfaceStubs/externstatic.c
@@ -1,20 +1,20 @@
 // REQUIRES: x86-registered-target
-// RUN: %clang -cc1 -fvisibility=default -DSTORAGE="extern" -o - -emit-interface-stubs -std=c99 -xc %s | \
+// RUN: %clang_cc1 -fvisibility=default -DSTORAGE="extern" -o - -emit-interface-stubs -std=c99 -xc %s | \
 // RUN: FileCheck -check-prefix=CHECK-EXTERN %s
 
-// RUN: %clang -cc1 -triple x86_64 -fvisibility=default -DSTORAGE=extern -O0 -o - -emit-obj -std=c99 \
+// RUN: %clang_cc1 -triple x86_64 -fvisibility=default -DSTORAGE=extern -O0 -o - -emit-obj -std=c99 \
 // RUN:   %s | llvm-nm - 2>&1 | FileCheck -check-prefix=CHECK-EXTERN %s
 
-// RUN: %clang -cc1 -fvisibility=default -DSTORAGE="extern" -o - -emit-interface-stubs -std=c99 -xc %s | \
+// RUN: %clang_cc1 -fvisibility=default -DSTORAGE="extern" -o - -emit-interface-stubs -std=c99 -xc %s | \
 // RUN: FileCheck -check-prefix=CHECK-EXTERN2 %s
 
-// RUN: %clang -cc1 -triple x86_64 -fvisibility=default -DSTORAGE=extern -O0 -o - -emit-obj -std=c99 \
+// RUN: %clang_cc1 -triple x86_64 -fvisibility=default -DSTORAGE=extern -O0 -o - -emit-obj -std=c99 \
 // RUN:   %s | llvm-nm - 2>&1 | FileCheck -check-prefix=CHECK-EXTERN2 %s
 
-// RUN: %clang -cc1 -fvisibility=default -DSTORAGE="static" -o - -emit-interface-stubs -std=c99 -xc %s | \
+// RUN: %clang_cc1 -fvisibility=default -DSTORAGE="static" -o - -emit-interface-stubs -std=c99 -xc %s | \
 // RUN: FileCheck -check-prefix=CHECK-STATIC %s
 
-// RUN: %clang -cc1 -triple x86_64 -fvisibility=default -DSTORAGE=static -O0 -o - -emit-obj -std=c99 \
+// RUN: %clang_cc1 -triple x86_64 -fvisibility=default -DSTORAGE=static -O0 -o - -emit-obj -std=c99 \
 // RUN:   %s | llvm-nm - 2>&1 | count 0
 
 // CHECK-EXTERN-NOT: foo