Index: clang/test/Driver/riscv32-toolchain-extra.c
===================================================================
--- clang/test/Driver/riscv32-toolchain-extra.c
+++ clang/test/Driver/riscv32-toolchain-extra.c
@@ -11,25 +11,26 @@
 // The test below checks that the driver correctly finds the linker and
 // runtime if and only if they exist.
 //
-// RUN: rm -rf %T/testroot-riscv32-baremetal-nogcc
-// RUN: mkdir -p %T/testroot-riscv32-baremetal-nogcc/bin
-// RUN: ln -s %clang %T/testroot-riscv32-baremetal-nogcc/bin/clang
-// RUN: ln -s %S/Inputs/basic_riscv32_nogcc_tree/bin/riscv32-unknown-elf-ld %T/testroot-riscv32-baremetal-nogcc/bin/riscv32-unknown-elf-ld
-// RUN: ln -s %S/Inputs/basic_riscv32_nogcc_tree/riscv32-unknown-elf %T/testroot-riscv32-baremetal-nogcc/riscv32-unknown-elf
-// RUN: %T/testroot-riscv32-baremetal-nogcc/bin/clang %s -### -no-canonical-prefixes \
-// RUN:    --gcc-toolchain=%T/testroot-riscv32-baremetal-nogcc/invalid \
+// RUN: rm -rf %t
+// RUN: mkdir -p %t/riscv32-nogcc/bin
+// RUN: ln -s %clang %t/riscv32-nogcc/bin/clang
+// RUN: ln -s %S/Inputs/basic_riscv32_nogcc_tree/bin/riscv32-unknown-elf-ld %t/riscv32-nogcc/bin/riscv32-unknown-elf-ld
+// RUN: ln -s %S/Inputs/basic_riscv32_nogcc_tree/riscv32-unknown-elf %t/riscv32-nogcc/riscv32-unknown-elf
+// RUN: %t/riscv32-nogcc/bin/clang %s -### -no-canonical-prefixes \
+// RUN:    --gcc-toolchain=%t/riscv32-nogcc/invalid \
 // RUN:    -target riscv32-unknown-elf --rtlib=platform -fuse-ld= 2>&1 \
 // RUN:    | FileCheck -check-prefix=C-RV32-BAREMETAL-ILP32-NOGCC %s
 
-// RUN: %T/testroot-riscv32-baremetal-nogcc/bin/clang %s -### -no-canonical-prefixes \
+// RUN: %t/riscv32-nogcc/bin/clang %s -### -no-canonical-prefixes \
+// RUN:    --sysroot=%t/riscv32-nogcc/bin/../riscv32-unknown-elf \
 // RUN:    -target riscv32-unknown-elf --rtlib=platform -fuse-ld= 2>&1 \
 // RUN:    | FileCheck -check-prefix=C-RV32-BAREMETAL-ILP32-NOGCC %s
 
-// C-RV32-BAREMETAL-ILP32-NOGCC: "-internal-isystem" "{{.*}}Output/testroot-riscv32-baremetal-nogcc/bin/../riscv32-unknown-elf/include"
-// C-RV32-BAREMETAL-ILP32-NOGCC: "{{.*}}Output/testroot-riscv32-baremetal-nogcc/bin/riscv32-unknown-elf-ld"
-// C-RV32-BAREMETAL-ILP32-NOGCC: "{{.*}}Output/testroot-riscv32-baremetal-nogcc/bin/../riscv32-unknown-elf/lib/crt0.o"
-// C-RV32-BAREMETAL-ILP32-NOGCC: "{{.*}}Output/testroot-riscv32-baremetal-nogcc/{{.*}}/lib/clang_rt.crtbegin-riscv32.o"
-// C-RV32-BAREMETAL-ILP32-NOGCC: "{{.*}}Output/testroot-riscv32-baremetal-nogcc/bin/../riscv32-unknown-elf/lib"
+// C-RV32-BAREMETAL-ILP32-NOGCC: "-internal-isystem" "{{.*}}/riscv32-nogcc/bin/../riscv32-unknown-elf/include"
+// C-RV32-BAREMETAL-ILP32-NOGCC: "{{.*}}/riscv32-nogcc/bin/riscv32-unknown-elf-ld"
+// C-RV32-BAREMETAL-ILP32-NOGCC: "{{.*}}/riscv32-nogcc/bin/../riscv32-unknown-elf/lib/crt0.o"
+// C-RV32-BAREMETAL-ILP32-NOGCC: "{{.*}}/riscv32-nogcc/{{.*}}/lib/clang_rt.crtbegin-riscv32.o"
+// C-RV32-BAREMETAL-ILP32-NOGCC: "{{.*}}/riscv32-nogcc/bin/../riscv32-unknown-elf/lib"
 // C-RV32-BAREMETAL-ILP32-NOGCC: "--start-group" "-lc" "-lgloss" "--end-group"
-// C-RV32-BAREMETAL-ILP32-NOGCC: "{{.*}}Output/testroot-riscv32-baremetal-nogcc/{{.*}}/lib/libclang_rt.builtins-riscv32.a"
-// C-RV32-BAREMETAL-ILP32-NOGCC: "{{.*}}Output/testroot-riscv32-baremetal-nogcc/{{.*}}/lib/clang_rt.crtend-riscv32.o"
+// C-RV32-BAREMETAL-ILP32-NOGCC: "{{.*}}/riscv32-nogcc/{{.*}}/lib/libclang_rt.builtins-riscv32.a"
+// C-RV32-BAREMETAL-ILP32-NOGCC: "{{.*}}/riscv32-nogcc/{{.*}}/lib/clang_rt.crtend-riscv32.o"
Index: clang/test/Driver/riscv64-toolchain-extra.c
===================================================================
--- clang/test/Driver/riscv64-toolchain-extra.c
+++ clang/test/Driver/riscv64-toolchain-extra.c
@@ -11,25 +11,26 @@
 // The test below checks that the driver correctly finds the linker and
 // runtime if and only if they exist.
 //
-// RUN: rm -rf %T/testroot-riscv64-baremetal-nogcc
-// RUN: mkdir -p %T/testroot-riscv64-baremetal-nogcc/bin
-// RUN: ln -s %clang %T/testroot-riscv64-baremetal-nogcc/bin/clang
-// RUN: ln -s %S/Inputs/basic_riscv64_nogcc_tree/bin/riscv64-unknown-elf-ld %T/testroot-riscv64-baremetal-nogcc/bin/riscv64-unknown-elf-ld
-// RUN: ln -s %S/Inputs/basic_riscv64_nogcc_tree/riscv64-unknown-elf %T/testroot-riscv64-baremetal-nogcc/riscv64-unknown-elf
-// RUN: %T/testroot-riscv64-baremetal-nogcc/bin/clang %s -### -no-canonical-prefixes \
-// RUN:    --gcc-toolchain=%T/testroot-riscv64-baremetal-nogcc/invalid \
+// RUN: rm -rf %t
+// RUN: mkdir -p %t/riscv64-nogcc/bin
+// RUN: ln -s %clang %t/riscv64-nogcc/bin/clang
+// RUN: ln -s %S/Inputs/basic_riscv64_nogcc_tree/bin/riscv64-unknown-elf-ld %t/riscv64-nogcc/bin/riscv64-unknown-elf-ld
+// RUN: ln -s %S/Inputs/basic_riscv64_nogcc_tree/riscv64-unknown-elf %t/riscv64-nogcc/riscv64-unknown-elf
+// RUN: %t/riscv64-nogcc/bin/clang %s -### -no-canonical-prefixes \
+// RUN:    --gcc-toolchain=%t/riscv64-nogcc/invalid \
 // RUN:    -target riscv64-unknown-elf --rtlib=platform -fuse-ld= 2>&1 \
 // RUN:    | FileCheck -check-prefix=C-RV64-BAREMETAL-LP64-NOGCC %s
 
-// RUN: %T/testroot-riscv64-baremetal-nogcc/bin/clang %s -### -no-canonical-prefixes \
+// RUN: %t/riscv64-nogcc/bin/clang %s -### -no-canonical-prefixes \
+// RUN:    --sysroot=%t/riscv64-nogcc/bin/../riscv64-unknown-elf \
 // RUN:    -target riscv64-unknown-elf --rtlib=platform -fuse-ld= 2>&1 \
 // RUN:    | FileCheck -check-prefix=C-RV64-BAREMETAL-LP64-NOGCC %s
 
-// C-RV64-BAREMETAL-LP64-NOGCC: "-internal-isystem" "{{.*}}Output/testroot-riscv64-baremetal-nogcc/bin/../riscv64-unknown-elf/include"
-// C-RV64-BAREMETAL-LP64-NOGCC: "{{.*}}Output/testroot-riscv64-baremetal-nogcc/bin/riscv64-unknown-elf-ld"
-// C-RV64-BAREMETAL-LP64-NOGCC: "{{.*}}Output/testroot-riscv64-baremetal-nogcc/bin/../riscv64-unknown-elf/lib/crt0.o"
-// C-RV64-BAREMETAL-LP64-NOGCC: "{{.*}}Output/testroot-riscv64-baremetal-nogcc/{{.*}}/lib/clang_rt.crtbegin-riscv64.o"
-// C-RV64-BAREMETAL-LP64-NOGCC: "{{.*}}Output/testroot-riscv64-baremetal-nogcc/bin/../riscv64-unknown-elf/lib"
+// C-RV64-BAREMETAL-LP64-NOGCC: "-internal-isystem" "{{.*}}/riscv64-nogcc/bin/../riscv64-unknown-elf/include"
+// C-RV64-BAREMETAL-LP64-NOGCC: "{{.*}}/riscv64-nogcc/bin/riscv64-unknown-elf-ld"
+// C-RV64-BAREMETAL-LP64-NOGCC: "{{.*}}/riscv64-nogcc/bin/../riscv64-unknown-elf/lib/crt0.o"
+// C-RV64-BAREMETAL-LP64-NOGCC: "{{.*}}/riscv64-nogcc/{{.*}}/lib/clang_rt.crtbegin-riscv64.o"
+// C-RV64-BAREMETAL-LP64-NOGCC: "{{.*}}/riscv64-nogcc/bin/../riscv64-unknown-elf/lib"
 // C-RV64-BAREMETAL-LP64-NOGCC: "--start-group" "-lc" "-lgloss" "--end-group"
-// C-RV64-BAREMETAL-LP64-NOGCC: "{{.*}}Output/testroot-riscv64-baremetal-nogcc/{{.*}}/lib/libclang_rt.builtins-riscv64.a"
-// C-RV64-BAREMETAL-LP64-NOGCC: "{{.*}}Output/testroot-riscv64-baremetal-nogcc/{{.*}}/lib/clang_rt.crtend-riscv64.o"
+// C-RV64-BAREMETAL-LP64-NOGCC: "{{.*}}/riscv64-nogcc/{{.*}}/lib/libclang_rt.builtins-riscv64.a"
+// C-RV64-BAREMETAL-LP64-NOGCC: "{{.*}}/riscv64-nogcc/{{.*}}/lib/clang_rt.crtend-riscv64.o"