[AIX][driver] Include crti[_64].o and -bcdtors also for C language link invocations by default

[Xiangling_L]

Summary

In order to support attribute((constructor)) and attribute((destructor)), which is used by various LLVM non-C++ runtime components, AIX will include crti[_64].o and -bcdtors for C language link invocations by default.

[daltenty]

clang/lib/Driver/ToolChains/AIX.cpp

136–137

I think that rather that adding CC, we should just pull the if and unconditionally link crti.o. This is consistent with what is done on other platforms and since the llvm.global_c/dtors are generally allowable in the IR, we might see them in more than just the two driver scenarios suggested here.

144

Ditto the previous comment.

[Xiangling_L]

clang/lib/Driver/ToolChains/AIX.cpp

136–137

we should just pull the if and unconditionally link crti.o. ...we might see them in more than just the two driver scenarios suggested here.

I was thinking to use the code to document what exactly happen is under c++ and c mode we link crti.o. But I think it makes sense to just remove if as you said. But we can indicate it's something for C and CXX mode only? Cuz as far as I know, there are c++, c, preprocessor, cl and flang driver mode. I think it only make sense for us to see static init functions generated in IR in c++ and c mode on AIX?

[daltenty]

clang/lib/Driver/ToolChains/AIX.cpp

136–137

These mode flags don't exactly correspond to input languages though, so it's not quite right to say this is "something for C and CXX mode only" (i.e. CXX isn't defined as "C++" mode, it's "behave similar to g++").

For example, it seems like if someone tired to link a mixed C and Fortran program using --driver-mode=flang, the static init in the C portion would stop working because we'd omit crit.o. I don't know if there is an advantage to being more specific in this case, and it definitely seems like it could run us into problems.

[Xiangling_L]

Remove the if condition and tweak the comments;

[daltenty]

LGTM, thanks!

clang/lib/Driver/ToolChains/AIX.cpp

auto getCrt0Basename = [&Args, IsArch32Bit] {
     else
       return IsArch32Bit ? "crt0.o" : "crt0_64.o";
   };
 
   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
                    options::OPT_shared)) {
     CmdArgs.push_back(
         Args.MakeArgString(ToolChain.GetFilePath(getCrt0Basename())));
 
-    if (D.CCCIsCXX())
-      CmdArgs.push_back(Args.MakeArgString(
-          ToolChain.GetFilePath(IsArch32Bit ? "crti.o" : "crti_64.o")));
   }
 
-  // Collect all static constructor and destructor functions in CXX mode. This
-  // has to come before AddLinkerInputs as the implied option needs to precede
-  // any other '-bcdtors' settings or '-bnocdtors' that '-Wl' might forward.
-  if (D.CCCIsCXX())
-    CmdArgs.push_back("-bcdtors:all:0:s");
+  // Collect all static constructor and destructor functions in both C and CXX
+  // language link invocations. This has to come before AddLinkerInputs as the
+  // implied option needs to precede any other '-bcdtors' settings or
+  // '-bnocdtors' that '-Wl' might forward.
 
   // Specify linker input file(s).
   AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
 
   // Add directory to library search path.
   Args.AddAllArgs(CmdArgs, options::OPT_L);
   ToolChain.AddFilePathLibArgs(Args, CmdArgs);
   ToolChain.addProfileRTLibs(Args, CmdArgs);

clang/test/Driver/aix-ld.c

 // CHECK-LD32:     {{.*}}clang{{(.exe)?}}" "-cc1" "-triple" "powerpc-ibm-aix7.1.0.0"
 // CHECK-LD32:     "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-LD32:     "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-LD32:     "{{.*}}ld{{(.exe)?}}"
 // CHECK-LD32-NOT: "-bnso"
 // CHECK-LD32:     "-b32"
 // CHECK-LD32:     "-bpT:0x10000000" "-bpD:0x20000000"
 // CHECK-LD32:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crt0.o"
-// CHECK-LD32-NOT: "[[SYSROOT]]/usr/lib{{/|\\\\}}crti.o"
+// CHECK-LD32:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crti.o"
 // CHECK-LD32:     "-L[[SYSROOT]]/usr/lib"
 // CHECK-LD32-NOT: "-lc++"
 // CHECK-LD32:     "[[RESOURCE_DIR]]{{/|\\\\}}lib{{/|\\\\}}aix{{/|\\\\}}libclang_rt.builtins-powerpc.a"
 // CHECK-LD32-NOT: "-lm"
 // CHECK-LD32:     "-lc"
 
 // Check powerpc64-ibm-aix7.1.0.0, 64-bit.
 // RUN: %clang -no-canonical-prefixes %s -### 2>&1 \
 // RUN:        -resource-dir=%S/Inputs/resource_dir \
 // RUN:        -target powerpc64-ibm-aix7.1.0.0 \
 // RUN:        --sysroot %S/Inputs/aix_ppc_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-LD64 %s
 // CHECK-LD64-NOT: warning:
 // CHECK-LD64:     {{.*}}clang{{(.exe)?}}" "-cc1" "-triple" "powerpc64-ibm-aix7.1.0.0"
 // CHECK-LD64:     "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-LD64:     "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-LD64:     "{{.*}}ld{{(.exe)?}}"
 // CHECK-LD64-NOT: "-bnso"
 // CHECK-LD64:     "-b64"
 // CHECK-LD64:     "-bpT:0x100000000" "-bpD:0x110000000"
 // CHECK-LD64:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crt0_64.o"
-// CHECK-LD64-NOT: "[[SYSROOT]]/usr/lib{{/|\\\\}}crti_64.o"
+// CHECK-LD64:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crti_64.o"
 // CHECK-LD64:     "-L[[SYSROOT]]/usr/lib"
 // CHECK-LD64-NOT: "-lc++"
 // CHECK-LD64:     "[[RESOURCE_DIR]]{{/|\\\\}}lib{{/|\\\\}}aix{{/|\\\\}}libclang_rt.builtins-powerpc64.a"
 // CHECK-LD64-NOT: "-lm"
 // CHECK-LD64:     "-lc"
 
 // Check powerpc-ibm-aix7.1.0.0, 32-bit. Enable POSIX thread support.
 // RUN: %clang -no-canonical-prefixes %s -### 2>&1 \
 // RUN:        -resource-dir=%S/Inputs/resource_dir \
 // RUN:        -pthread \
 // RUN:        -target powerpc-ibm-aix7.1.0.0 \
 // RUN:        --sysroot %S/Inputs/aix_ppc_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-LD32-PTHREAD %s
 // CHECK-LD32-PTHREAD-NOT: warning:
 // CHECK-LD32-PTHREAD:     {{.*}}clang{{(.exe)?}}" "-cc1" "-triple" "powerpc-ibm-aix7.1.0.0"
 // CHECK-LD32-PTHREAD:     "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-LD32-PTHREAD:     "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-LD32-PTHREAD:     "{{.*}}ld{{(.exe)?}}"
 // CHECK-LD32-PTHREAD-NOT: "-bnso"
 // CHECK-LD32-PTHREAD:     "-b32"
 // CHECK-LD32-PTHREAD:     "-bpT:0x10000000" "-bpD:0x20000000"
 // CHECK-LD32-PTHREAD:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crt0.o"
-// CHECK-LD32-PTHREAD-NOT: "[[SYSROOT]]/usr/lib{{/|\\\\}}crti.o"
+// CHECK-LD32-PTHREAD:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crti.o"
 // CHECK-LD32-PTHREAD:     "-L[[SYSROOT]]/usr/lib"
 // CHECK-LD32-PTHREAD-NOT: "-lc++"
 // CHECK-LD32-PTHREAD:     "[[RESOURCE_DIR]]{{/|\\\\}}lib{{/|\\\\}}aix{{/|\\\\}}libclang_rt.builtins-powerpc.a"
 // CHECK-LD32-PTHREAD:     "-lpthreads"
 // CHECK-LD32-PTHREAD-NOT: "-lm"
 // CHECK-LD32-PTHREAD:     "-lc"
 
 // Check powerpc64-ibm-aix7.1.0.0, 64-bit. POSIX thread alias.
 // RUN: %clang -no-canonical-prefixes %s -### 2>&1 \
 // RUN:        -resource-dir=%S/Inputs/resource_dir \
 // RUN:        -pthreads \
 // RUN:        -target powerpc64-ibm-aix7.1.0.0 \
 // RUN:        --sysroot %S/Inputs/aix_ppc_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-LD64-PTHREAD %s
 // CHECK-LD64-PTHREAD-NOT: warning:
 // CHECK-LD64-PTHREAD:     {{.*}}clang{{(.exe)?}}" "-cc1" "-triple" "powerpc64-ibm-aix7.1.0.0"
 // CHECK-LD64-PTHREAD:     "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-LD64-PTHREAD:     "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-LD64-PTHREAD:     "{{.*}}ld{{(.exe)?}}"
 // CHECK-LD64-PTHREAD-NOT: "-bnso"
 // CHECK-LD64-PTHREAD:     "-b64"
 // CHECK-LD64-PTHREAD:     "-bpT:0x100000000" "-bpD:0x110000000"
 // CHECK-LD64-PTHREAD:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crt0_64.o"
-// CHECK-LD64-PTHREAD-NOT: "[[SYSROOT]]/usr/lib{{/|\\\\}}crti_64.o"
+// CHECK-LD64-PTHREAD:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crti_64.o"
 // CHECK-LD64-PTHREAD:     "-L[[SYSROOT]]/usr/lib"
 // CHECK-LD64-PTHREAD-NOT: "-lc++"
 // CHECK-LD64-PTHREAD:     "[[RESOURCE_DIR]]{{/|\\\\}}lib{{/|\\\\}}aix{{/|\\\\}}libclang_rt.builtins-powerpc64.a"
 // CHECK-LD64-PTHREAD:     "-lpthreads"
 // CHECK-LD64-PTHREAD-NOT: "-lm"
 // CHECK-LD64-PTHREAD:     "-lc"
 
 // Check powerpc-ibm-aix7.1.0.0, 32-bit. Enable profiling.
 // RUN: %clang -no-canonical-prefixes %s -### 2>&1 \
 // RUN:        -resource-dir=%S/Inputs/resource_dir \
 // RUN:        -p \
 // RUN:        -target powerpc-ibm-aix7.1.0.0 \
 // RUN:        --sysroot %S/Inputs/aix_ppc_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-LD32-PROF %s
 // CHECK-LD32-PROF-NOT: warning:
 // CHECK-LD32-PROF:     {{.*}}clang{{(.exe)?}}" "-cc1" "-triple" "powerpc-ibm-aix7.1.0.0"
 // CHECK-LD32-PROF:     "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-LD32-PROF:     "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-LD32-PROF:     "{{.*}}ld{{(.exe)?}}"
 // CHECK-LD32-PROF-NOT: "-bnso"
 // CHECK-LD32-PROF:     "-b32"
 // CHECK-LD32-PROF:     "-bpT:0x10000000" "-bpD:0x20000000"
 // CHECK-LD32-PROF:     "[[SYSROOT]]/usr/lib{{/|\\\\}}mcrt0.o"
-// CHECK-LD32-PROF-NOT: "[[SYSROOT]]/usr/lib{{/|\\\\}}crti.o"
+// CHECK-LD32-PROF:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crti.o"
 // CHECK-LD32-PROF:     "-L[[SYSROOT]]/usr/lib"
 // CHECK-LD32-PROF-NOT: "-lc++"
 // CHECK-LD32-PROF:     "[[RESOURCE_DIR]]{{/|\\\\}}lib{{/|\\\\}}aix{{/|\\\\}}libclang_rt.builtins-powerpc.a"
 // CHECK-LD32-PROF-NOT: "-lm"
 // CHECK-LD32-PROF:     "-lc"
 
 // Check powerpc64-ibm-aix7.1.0.0, 64-bit. Enable g-profiling.
 // RUN: %clang -no-canonical-prefixes %s -### 2>&1 \
 // RUN:        -resource-dir=%S/Inputs/resource_dir \
 // RUN:        -pg \
 // RUN:        -target powerpc64-ibm-aix7.1.0.0 \
 // RUN:        --sysroot %S/Inputs/aix_ppc_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-LD64-GPROF %s
 // CHECK-LD64-GPROF-NOT: warning:
 // CHECK-LD64-GPROF:     {{.*}}clang{{(.exe)?}}" "-cc1" "-triple" "powerpc64-ibm-aix7.1.0.0"
 // CHECK-LD64-GPROF:     "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-LD64-GPROF:     "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-LD64-GPROF:     "{{.*}}ld{{(.exe)?}}"
 // CHECK-LD64-GPROF-NOT: "-bnso"
 // CHECK-LD64-GPROF:     "-b64"
 // CHECK-LD64-GPROF:     "-bpT:0x100000000" "-bpD:0x110000000"
 // CHECK-LD64-GPROF:     "[[SYSROOT]]/usr/lib{{/|\\\\}}gcrt0_64.o"
-// CHECK-LD64-GPROF-NOT: "[[SYSROOT]]/usr/lib{{/|\\\\}}crti_64.o"
+// CHECK-LD64-GPROF:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crti_64.o"
 // CHECK-LD64-GPROF:     "-L[[SYSROOT]]/usr/lib"
 // CHECK-LD64-GPROF-NOT: "-lc++"
 // CHECK-LD64-GPROF:     "[[RESOURCE_DIR]]{{/|\\\\}}lib{{/|\\\\}}aix{{/|\\\\}}libclang_rt.builtins-powerpc64.a"
 // CHECK-LD64-GPROF-NOT: "-lm"
 // CHECK-LD64-GPROF:     "-lc"
 
 // Check powerpc-ibm-aix7.1.0.0, 32-bit. Static linking.
 // RUN: %clang -no-canonical-prefixes %s -### 2>&1 \
 // RUN:        -resource-dir=%S/Inputs/resource_dir \
 // RUN:        -static \
 // RUN:        -target powerpc-ibm-aix7.1.0.0 \
 // RUN:        --sysroot %S/Inputs/aix_ppc_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-LD32-STATIC %s
 // CHECK-LD32-STATIC-NOT: warning:
 // CHECK-LD32-STATIC:     {{.*}}clang{{(.exe)?}}" "-cc1" "-triple" "powerpc-ibm-aix7.1.0.0"
 // CHECK-LD32-STATIC:     "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-LD32-STATIC:     "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-LD32-STATIC:     "{{.*}}ld{{(.exe)?}}"
 // CHECK-LD32-STATIC:     "-bnso"
 // CHECK-LD32-STATIC:     "-b32"
 // CHECK-LD32-STATIC:     "-bpT:0x10000000" "-bpD:0x20000000"
 // CHECK-LD32-STATIC:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crt0.o"
-// CHECK-LD32-STATIC-NOT: "[[SYSROOT]]/usr/lib{{/|\\\\}}crti.o"
+// CHECK-LD32-STATIC:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crti.o"
 // CHECK-LD32-STATIC:     "-L[[SYSROOT]]/usr/lib"
 // CHECK-LD32-STATIC-NOT: "-lc++"
 // CHECK-LD32-STATIC:     "[[RESOURCE_DIR]]{{/|\\\\}}lib{{/|\\\\}}aix{{/|\\\\}}libclang_rt.builtins-powerpc.a"
 // CHECK-LD32-STATIC-NOT: "-lm"
 // CHECK-LD32-STATIC:     "-lc"
 
 // Check powerpc-ibm-aix7.1.0.0, 32-bit. Library search path.
 // RUN: %clang -no-canonical-prefixes %s -### 2>&1 \
 // RUN:        -resource-dir=%S/Inputs/resource_dir \
 // RUN:        -L%S/Inputs/aix_ppc_tree/powerpc-ibm-aix7.1.0.0 \
 // RUN:        -target powerpc-ibm-aix7.1.0.0 \
 // RUN:        --sysroot %S/Inputs/aix_ppc_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-LD32-LIBP %s
 // CHECK-LD32-LIBP-NOT: warning:
 // CHECK-LD32-LIBP:     {{.*}}clang{{(.exe)?}}" "-cc1" "-triple" "powerpc-ibm-aix7.1.0.0"
 // CHECK-LD32-LIBP:     "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-LD32-LIBP:     "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-LD32-LIBP:     "{{.*}}ld{{(.exe)?}}"
 // CHECK-LD32-LIBP-NOT: "-bnso"
 // CHECK-LD32-LIBP:     "-b32"
 // CHECK-LD32-LIBP:     "-bpT:0x10000000" "-bpD:0x20000000"
 // CHECK-LD32-LIBP:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crt0.o"
-// CHECK-LD32-LIBP-NOT: "[[SYSROOT]]/usr/lib{{/|\\\\}}crti.o"
+// CHECK-LD32-LIBP:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crti.o"
 // CHECK-LD32-LIBP:     "-L[[SYSROOT]]/powerpc-ibm-aix7.1.0.0"
 // CHECK-LD32-LIBP:     "-L[[SYSROOT]]/usr/lib"
 // CHECK-LD32-LIBP-NOT: "-lc++"
 // CHECK-LD32-LIBP:     "[[RESOURCE_DIR]]{{/|\\\\}}lib{{/|\\\\}}aix{{/|\\\\}}libclang_rt.builtins-powerpc.a"
 // CHECK-LD32-LIBP-NOT: "-lm"
 // CHECK-LD32-LIBP:     "-lc"
 
 // Check powerpc-ibm-aix7.1.0.0, 32-bit. nostdlib.

 // CHECK-LD64-NO-DEFAULT-LIBS:     {{.*}}clang{{(.exe)?}}" "-cc1" "-triple" "powerpc64-ibm-aix7.1.0.0"
 // CHECK-LD64-NO-DEFAULT-LIBS:     "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-LD64-NO-DEFAULT-LIBS:     "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-LD64-NO-DEFAULT-LIBS:     "{{.*}}ld{{(.exe)?}}"
 // CHECK-LD64-NO-DEFAULT-LIBS-NOT: "-bnso"
 // CHECK-LD64-NO-DEFAULT-LIBS:     "-b64"
 // CHECK-LD64-NO-DEFAULT-LIBS:     "-bpT:0x100000000" "-bpD:0x110000000"
 // CHECK-LD64-NO-DEFAULT-LIBS:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crt0_64.o"
-// CHECK-LD64-NO-DEFAULT-LIBS-NOT: "[[SYSROOT]]/usr/lib{{/|\\\\}}crti_64.o"
+// CHECK-LD64-NO-DEFAULT-LIBS:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crti_64.o"
 // CHECK-LD64-NO-DEFAULT-LIBS:     "-L[[SYSROOT]]/usr/lib"
 // CHECK-LD64-NO-DEFAULT-LIBS-NOT: "-lc++"
 // CHECK-LD64-NO-DEFAULT-LIBS-NOT: "[[RESOURCE_DIR]]{{/|\\\\}}lib{{/|\\\\}}aix{{/|\\\\}}libclang_rt.builtins-powerpc64.a"
 // CHECK-LD64-NO-DEFAULT-LIBS-NOT: "-lpthreads"
 // CHECK-LD64-NO-DEFAULT-LIBS-NOT: "-lm"
 // CHECK-LD64-NO-DEFAULT-LIBS-NOT: "-lc"
 
 // Check powerpc-ibm-aix7.1.0.0, 32-bit. 'bcdtors' and argument order.
+// RUN: %clang -no-canonical-prefixes %s 2>&1 -### \
+// RUN:        -resource-dir=%S/Inputs/resource_dir \
+// RUN:        -Wl,-bnocdtors \
+// RUN:        -target powerpc-ibm-aix7.1.0.0 \
+// RUN:        --sysroot %S/Inputs/aix_ppc_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-LD32-ARG-ORDER %s
+// CHECK-LD32-ARG-ORDER:     {{.*}}clang{{.*}}" "-cc1" "-triple" "powerpc-ibm-aix7.1.0.0"
+// CHECK-LD32-ARG-ORDER:     "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
+// CHECK-LD32-ARG-ORDER:     "-isysroot" "[[SYSROOT:[^"]+]]"
+// CHECK-LD32-ARG-ORDER:     "{{.*}}ld{{(.exe)?}}"
+// CHECK-LD32-ARG-ORDER-NOT: "-bnso"
+// CHECK-LD32-ARG-ORDER:     "-b32"
+// CHECK-LD32-ARG-ORDER:     "-bpT:0x10000000" "-bpD:0x20000000"
+// CHECK-LD32-ARG-ORDER:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crt0.o"
+// CHECK-LD32-ARG-ORDER:     "[[SYSROOT]]/usr/lib{{/|\\\\}}crti.o"
+// CHECK-LD32-ARG-ORDER:     "-bcdtors:all:0:s"
+// CHECK-LD32-ARG-ORDER:     "-bnocdtors"
+// CHECK-LD32-ARG-ORDER-NOT: "-bcdtors:all:0:s"
+// CHECK-LD32-ARG-ORDER-NOT: "-lc++"
+// CHECK-LD32-ARG-ORDER:     "[[RESOURCE_DIR]]{{/|\\\\}}lib{{/|\\\\}}aix{{/|\\\\}}libclang_rt.builtins-powerpc.a"
+// CHECK-LD32-ARG-ORDER-NOT: "-lm"
+// CHECK-LD32-ARG-ORDER:     "-lc"
+
+// Check powerpc-ibm-aix7.1.0.0, 32-bit. 'bcdtors' and argument order.
 // RUN: %clangxx -no-canonical-prefixes %s 2>&1 -### \
 // RUN:        -resource-dir=%S/Inputs/resource_dir \
 // RUN:        -Wl,-bnocdtors \
 // RUN:        -target powerpc-ibm-aix7.1.0.0 \
 // RUN:        --sysroot %S/Inputs/aix_ppc_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-LD32-CXX-ARG-ORDER %s
 // CHECK-LD32-CXX-ARG-ORDER:     {{.*}}clang{{.*}}" "-cc1" "-triple" "powerpc-ibm-aix7.1.0.0"
 // CHECK-LD32-CXX-ARG-ORDER:     "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"