diff --git a/src/llvm-project/clang/test/Driver/cl-options.c b/src/llvm-project/clang/test/Driver/cl-options.c
new file mode 100644
index 0000000..909e391
--- /dev/null
+++ b/src/llvm-project/clang/test/Driver/cl-options.c
@@ -0,0 +1,649 @@
+// Note: %s must be preceded by --, otherwise it may be interpreted as a
+// command-line option, e.g. on Mac where %s is commonly under /Users.
+
+
+// Alias options:
+
+// RUN: %clang_cl /c -### -- %s 2>&1 | FileCheck -check-prefix=c %s
+// c: -c
+
+// RUN: %clang_cl /C -### -- %s 2>&1 | FileCheck -check-prefix=C %s
+// C: error: invalid argument '-C' only allowed with '/E, /P or /EP'
+
+// RUN: %clang_cl /C /P -### -- %s 2>&1 | FileCheck -check-prefix=C_P %s
+// C_P: "-E"
+// C_P: "-C"
+
+// RUN: %clang_cl /d1reportAllClassLayout -### -- %s 2>&1 | FileCheck -check-prefix=d1reportAllClassLayout %s
+// d1reportAllClassLayout: -fdump-record-layouts
+
+// RUN: %clang_cl /Dfoo=bar /D bar=baz /DMYDEF#value /DMYDEF2=foo#bar /DMYDEF3#a=b /DMYDEF4# \
+// RUN:    -### -- %s 2>&1 | FileCheck -check-prefix=D %s
+// D: "-D" "foo=bar"
+// D: "-D" "bar=baz"
+// D: "-D" "MYDEF=value"
+// D: "-D" "MYDEF2=foo#bar"
+// D: "-D" "MYDEF3=a=b"
+// D: "-D" "MYDEF4="
+
+// RUN: %clang_cl /E -### -- %s 2>&1 | FileCheck -check-prefix=E %s
+// E: "-E"
+// E: "-o" "-"
+
+// RUN: %clang_cl /EP -### -- %s 2>&1 | FileCheck -check-prefix=EP %s
+// EP: "-E"
+// EP: "-P"
+// EP: "-o" "-"
+
+// RUN: %clang_cl /fp:fast /fp:except -### -- %s 2>&1 | FileCheck -check-prefix=fpexcept %s
+// fpexcept-NOT: -menable-unsafe-fp-math
+
+// RUN: %clang_cl /fp:fast /fp:except /fp:except- -### -- %s 2>&1 | FileCheck -check-prefix=fpexcept_ %s
+// fpexcept_: -menable-unsafe-fp-math
+
+// RUN: %clang_cl /fp:precise /fp:fast -### -- %s 2>&1 | FileCheck -check-prefix=fpfast %s
+// fpfast: -menable-unsafe-fp-math
+// fpfast: -ffast-math
+
+// RUN: %clang_cl /fp:fast /fp:precise -### -- %s 2>&1 | FileCheck -check-prefix=fpprecise %s
+// fpprecise-NOT: -menable-unsafe-fp-math
+// fpprecise-NOT: -ffast-math
+
+// RUN: %clang_cl /fp:fast /fp:strict -### -- %s 2>&1 | FileCheck -check-prefix=fpstrict %s
+// fpstrict-NOT: -menable-unsafe-fp-math
+// fpstrict-NOT: -ffast-math
+
+// RUN: %clang_cl /Z7 -gcolumn-info -### -- %s 2>&1 | FileCheck -check-prefix=gcolumn %s
+// gcolumn: -dwarf-column-info
+
+// RUN: %clang_cl /Z7 -gno-column-info -### -- %s 2>&1 | FileCheck -check-prefix=gnocolumn %s
+// gnocolumn-NOT: -dwarf-column-info
+
+// RUN: %clang_cl /Z7 -### -- %s 2>&1 | FileCheck -check-prefix=gdefcolumn %s
+// gdefcolumn-NOT: -dwarf-column-info
+
+// RUN: %clang_cl -### /FA -fprofile-instr-generate -- %s 2>&1 | FileCheck -check-prefix=CHECK-PROFILE-GENERATE %s
+// RUN: %clang_cl -### /FA -fprofile-instr-generate=/tmp/somefile.profraw -- %s 2>&1 | FileCheck -check-prefix=CHECK-PROFILE-GENERATE-FILE %s
+// RUN: %clang_cl -### /FA -fprofile-instr-generate -fprofile-instr-use -- %s 2>&1 | FileCheck -check-prefix=CHECK-NO-MIX-GEN-USE %s
+// RUN: %clang_cl -### /FA -fprofile-instr-generate -fprofile-instr-use=file -- %s 2>&1 | FileCheck -check-prefix=CHECK-NO-MIX-GEN-USE %s
+// CHECK-PROFILE-GENERATE: "-fprofile-instrument=clang"
+// CHECK-PROFILE-GENERATE-FILE: "-fprofile-instrument-path=/tmp/somefile.profraw"
+// CHECK-NO-MIX-GEN-USE: '{{[a-z=-]*}}' not allowed with '{{[a-z=-]*}}'
+
+// RUN: %clang_cl -### /FA -fprofile-instr-use -- %s 2>&1 | FileCheck -check-prefix=CHECK-PROFILE-USE %s
+// RUN: %clang_cl -### /FA -fprofile-instr-use=/tmp/somefile.prof -- %s 2>&1 | FileCheck -check-prefix=CHECK-PROFILE-USE-FILE %s
+// CHECK-PROFILE-USE: "-fprofile-instrument-use-path=default.profdata"
+// CHECK-PROFILE-USE-FILE: "-fprofile-instrument-use-path=/tmp/somefile.prof"
+
+// RUN: %clang_cl /GA -### -- %s 2>&1 | FileCheck -check-prefix=GA %s
+// GA: -ftls-model=local-exec
+
+// RTTI is on by default; just check that we don't error.
+// RUN: %clang_cl /Zs /GR -- %s 2>&1
+
+// RUN: %clang_cl /GR- -### -- %s 2>&1 | FileCheck -check-prefix=GR_ %s
+// GR_: -fno-rtti
+
+// Security Buffer Check is on by default.
+// RUN: %clang_cl -### -- %s 2>&1 | FileCheck -check-prefix=GS-default %s
+// GS-default: "-stack-protector" "2"
+
+// RUN: %clang_cl /GS -### -- %s 2>&1 | FileCheck -check-prefix=GS %s
+// GS: "-stack-protector" "2"
+
+// RUN: %clang_cl /GS- -### -- %s 2>&1 | FileCheck -check-prefix=GS_ %s
+// GS_-NOT: -stack-protector
+
+// RUN: %clang_cl /Gy -### -- %s 2>&1 | FileCheck -check-prefix=Gy %s
+// Gy: -ffunction-sections
+
+// RUN: %clang_cl /Gy /Gy- -### -- %s 2>&1 | FileCheck -check-prefix=Gy_ %s
+// Gy_-NOT: -ffunction-sections
+
+// RUN: %clang_cl /Gs -### -- %s 2>&1 | FileCheck -check-prefix=Gs %s
+// Gs: "-mstack-probe-size=4096"
+// RUN: %clang_cl /Gs0 -### -- %s 2>&1 | FileCheck -check-prefix=Gs0 %s
+// Gs0: "-mstack-probe-size=0"
+// RUN: %clang_cl /Gs4096 -### -- %s 2>&1 | FileCheck -check-prefix=Gs4096 %s
+// Gs4096: "-mstack-probe-size=4096"
+
+// RUN: %clang_cl /Gw -### -- %s 2>&1 | FileCheck -check-prefix=Gw %s
+// Gw: -fdata-sections
+
+// RUN: %clang_cl /Gw /Gw- -### -- %s 2>&1 | FileCheck -check-prefix=Gw_ %s
+// Gw_-NOT: -fdata-sections
+
+// RUN: %clang_cl /Imyincludedir -### -- %s 2>&1 | FileCheck -check-prefix=SLASH_I %s
+// RUN: %clang_cl /I myincludedir -### -- %s 2>&1 | FileCheck -check-prefix=SLASH_I %s
+// SLASH_I: "-I" "myincludedir"
+
+// RUN: %clang_cl /imsvcmyincludedir -### -- %s 2>&1 | FileCheck -check-prefix=SLASH_imsvc %s
+// RUN: %clang_cl /imsvc myincludedir -### -- %s 2>&1 | FileCheck -check-prefix=SLASH_imsvc %s
+// Clang's resource header directory should be first:
+// SLASH_imsvc: "-internal-isystem" "{{[^"]*}}lib{{(64)?/|\\\\}}clang{{[^"]*}}include"
+// SLASH_imsvc: "-internal-isystem" "myincludedir"
+
+// RUN: %clang_cl /J -### -- %s 2>&1 | FileCheck -check-prefix=J %s
+// J: -fno-signed-char
+
+// RUN: %clang_cl /Ofoo -### -- %s 2>&1 | FileCheck -check-prefix=O %s
+// O: /Ofoo
+
+// RUN: %clang_cl /Ob0 -### -- %s 2>&1 | FileCheck -check-prefix=Ob0 %s
+// Ob0: -fno-inline
+
+// RUN: %clang_cl /Ob2 -### -- %s 2>&1 | FileCheck -check-prefix=Ob2 %s
+// RUN: %clang_cl /Odb2 -### -- %s 2>&1 | FileCheck -check-prefix=Ob2 %s
+// RUN: %clang_cl /O2 /Ob2 -### -- %s 2>&1 | FileCheck -check-prefix=Ob2 %s
+// Ob2-NOT: warning: argument unused during compilation: '/O2'
+// Ob2: -finline-functions
+
+// RUN: %clang_cl /Ob1 -### -- %s 2>&1 | FileCheck -check-prefix=Ob1 %s
+// RUN: %clang_cl /Odb1 -### -- %s 2>&1 | FileCheck -check-prefix=Ob1 %s
+// Ob1: -finline-hint-functions
+
+// RUN: %clang_cl /Od -### -- %s 2>&1 | FileCheck -check-prefix=Od %s
+// Od: -O0
+
+// RUN: %clang_cl /Oi- /Oi -### -- %s 2>&1 | FileCheck -check-prefix=Oi %s
+// Oi-NOT: -fno-builtin
+
+// RUN: %clang_cl /Oi- -### -- %s 2>&1 | FileCheck -check-prefix=Oi_ %s
+// Oi_: -fno-builtin
+
+// RUN: %clang_cl /Os --target=i686-pc-windows-msvc -### -- %s 2>&1 | FileCheck -check-prefix=Os %s
+// RUN: %clang_cl /Os --target=x86_64-pc-windows-msvc -### -- %s 2>&1 | FileCheck -check-prefix=Os %s
+// Os-NOT: -mdisable-fp-elim
+// Os: -momit-leaf-frame-pointer
+// Os: -Os
+
+// RUN: %clang_cl /Ot --target=i686-pc-windows-msvc -### -- %s 2>&1 | FileCheck -check-prefix=Ot %s
+// RUN: %clang_cl /Ot --target=x86_64-pc-windows-msvc -### -- %s 2>&1 | FileCheck -check-prefix=Ot %s
+// Ot-NOT: -mdisable-fp-elim
+// Ot: -momit-leaf-frame-pointer
+// Ot: -O2
+
+// RUN: %clang_cl /Ox --target=i686-pc-windows-msvc -### -- %s 2>&1 | FileCheck -check-prefix=Ox %s
+// RUN: %clang_cl /Ox --target=x86_64-pc-windows-msvc -### -- %s 2>&1 | FileCheck -check-prefix=Ox %s
+// Ox-NOT: -mdisable-fp-elim
+// Ox: -momit-leaf-frame-pointer
+// Ox: -O2
+
+// RUN: %clang_cl --target=i686-pc-win32 /O2sy- -### -- %s 2>&1 | FileCheck -check-prefix=PR24003 %s
+// PR24003: -mdisable-fp-elim
+// PR24003: -momit-leaf-frame-pointer
+// PR24003: -Os
+
+// RUN: %clang_cl --target=i686-pc-win32 -Werror /Oy- /O2 -### -- %s 2>&1 | FileCheck -check-prefix=Oy_2 %s
+// Oy_2: -momit-leaf-frame-pointer
+// Oy_2: -O2
+
+// RUN: %clang_cl --target=aarch64-pc-windows-msvc -Werror /Oy- /O2 -### -- %s 2>&1 | FileCheck -check-prefix=Oy_aarch64 %s
+// Oy_aarch64: -mdisable-fp-elim
+// Oy_aarch64: -O2
+
+// RUN: %clang_cl --target=i686-pc-win32 -Werror /O2 /O2 -### -- %s 2>&1 | FileCheck -check-prefix=O2O2 %s
+// O2O2: "-O2"
+
+// RUN: %clang_cl /Zs -Werror /Oy -- %s 2>&1
+
+// RUN: %clang_cl --target=i686-pc-win32 -Werror /Oy- -### -- %s 2>&1 | FileCheck -check-prefix=Oy_ %s
+// Oy_: -mdisable-fp-elim
+
+// RUN: %clang_cl /Qvec -### -- %s 2>&1 | FileCheck -check-prefix=Qvec %s
+// Qvec: -vectorize-loops
+
+// RUN: %clang_cl /Qvec /Qvec- -### -- %s 2>&1 | FileCheck -check-prefix=Qvec_ %s
+// Qvec_-NOT: -vectorize-loops
+
+// RUN: %clang_cl /showIncludes -### -- %s 2>&1 | FileCheck -check-prefix=showIncludes %s
+// showIncludes: --show-includes
+
+// RUN: %clang_cl /E /showIncludes -### -- %s 2>&1 | FileCheck -check-prefix=showIncludes_E %s
+// RUN: %clang_cl /EP /showIncludes -### -- %s 2>&1 | FileCheck -check-prefix=showIncludes_E %s
+// RUN: %clang_cl /E /EP /showIncludes -### -- %s 2>&1 | FileCheck -check-prefix=showIncludes_E %s
+// RUN: %clang_cl /EP /P /showIncludes -### -- %s 2>&1 | FileCheck -check-prefix=showIncludes_E %s
+// showIncludes_E-NOT: warning: argument unused during compilation: '--show-includes'
+
+// /source-charset: should warn on everything except UTF-8.
+// RUN: %clang_cl /source-charset:utf-16 -### -- %s 2>&1 | FileCheck -check-prefix=source-charset-utf-16 %s
+// source-charset-utf-16: invalid value 'utf-16'
+
+// /execution-charset: should warn on everything except UTF-8.
+// RUN: %clang_cl /execution-charset:utf-16 -### -- %s 2>&1 | FileCheck -check-prefix=execution-charset-utf-16 %s
+// execution-charset-utf-16: invalid value 'utf-16'
+//
+// RUN: %clang_cl /Umymacro -### -- %s 2>&1 | FileCheck -check-prefix=U %s
+// RUN: %clang_cl /U mymacro -### -- %s 2>&1 | FileCheck -check-prefix=U %s
+// U: "-U" "mymacro"
+
+// RUN: %clang_cl /validate-charset -### -- %s 2>&1 | FileCheck -check-prefix=validate-charset %s
+// validate-charset: -Winvalid-source-encoding
+
+// RUN: %clang_cl /validate-charset- -### -- %s 2>&1 | FileCheck -check-prefix=validate-charset_ %s
+// validate-charset_: -Wno-invalid-source-encoding
+
+// RUN: %clang_cl /vd2 -### -- %s 2>&1 | FileCheck -check-prefix=VD2 %s
+// VD2: -vtordisp-mode=2
+
+// RUN: %clang_cl /vmg -### -- %s 2>&1 | FileCheck -check-prefix=VMG %s
+// VMG: "-fms-memptr-rep=virtual"
+
+// RUN: %clang_cl /vmg /vms -### -- %s 2>&1 | FileCheck -check-prefix=VMS %s
+// VMS: "-fms-memptr-rep=single"
+
+// RUN: %clang_cl /vmg /vmm -### -- %s 2>&1 | FileCheck -check-prefix=VMM %s
+// VMM: "-fms-memptr-rep=multiple"
+
+// RUN: %clang_cl /vmg /vmv -### -- %s 2>&1 | FileCheck -check-prefix=VMV %s
+// VMV: "-fms-memptr-rep=virtual"
+
+// RUN: %clang_cl /vmg /vmb -### -- %s 2>&1 | FileCheck -check-prefix=VMB %s
+// VMB: '/vmg' not allowed with '/vmb'
+
+// RUN: %clang_cl /vmg /vmm /vms -### -- %s 2>&1 | FileCheck -check-prefix=VMX %s
+// VMX: '/vms' not allowed with '/vmm'
+
+// RUN: %clang_cl /volatile:iso -### -- %s 2>&1 | FileCheck -check-prefix=VOLATILE-ISO %s
+// VOLATILE-ISO-NOT: "-fms-volatile"
+
+// RUN: %clang_cl /volatile:ms -### -- %s 2>&1 | FileCheck -check-prefix=VOLATILE-MS %s
+// VOLATILE-MS: "-fms-volatile"
+
+// RUN: %clang_cl /W0 -### -- %s 2>&1 | FileCheck -check-prefix=W0 %s
+// W0: -w
+
+// RUN: %clang_cl /W1 -### -- %s 2>&1 | FileCheck -check-prefix=W1 %s
+// RUN: %clang_cl /W2 -### -- %s 2>&1 | FileCheck -check-prefix=W1 %s
+// RUN: %clang_cl /W3 -### -- %s 2>&1 | FileCheck -check-prefix=W1 %s
+// RUN: %clang_cl /W4 -### -- %s 2>&1 | FileCheck -check-prefix=W4 %s
+// RUN: %clang_cl /Wall -### -- %s 2>&1 | FileCheck -check-prefix=Weverything %s
+// W1: -Wall
+// W4: -WCL4
+// Weverything: -Weverything
+
+// RUN: %clang_cl /WX -### -- %s 2>&1 | FileCheck -check-prefix=WX %s
+// WX: -Werror
+
+// RUN: %clang_cl /WX- -### -- %s 2>&1 | FileCheck -check-prefix=WX_ %s
+// WX_: -Wno-error
+
+// RUN: %clang_cl /w -### -- %s 2>&1 | FileCheck -check-prefix=w %s
+// w: -w
+
+// RUN: %clang_cl /Zp -### -- %s 2>&1 | FileCheck -check-prefix=ZP %s
+// ZP: -fpack-struct=1
+
+// RUN: %clang_cl /Zp2 -### -- %s 2>&1 | FileCheck -check-prefix=ZP2 %s
+// ZP2: -fpack-struct=2
+
+// RUN: %clang_cl /Zs -### -- %s 2>&1 | FileCheck -check-prefix=Zs %s
+// Zs: -fsyntax-only
+
+// RUN: %clang_cl /FIasdf.h -### -- %s 2>&1 | FileCheck -check-prefix=FI %s
+// FI: "-include" "asdf.h"
+
+// RUN: %clang_cl /FI asdf.h -### -- %s 2>&1 | FileCheck -check-prefix=FI_ %s
+// FI_: "-include" "asdf.h"
+
+// RUN: %clang_cl /TP /c -### -- %s 2>&1 | FileCheck -check-prefix=NO-GX %s
+// NO-GX-NOT: "-fcxx-exceptions" "-fexceptions"
+
+// RUN: %clang_cl /TP /c /GX -### -- %s 2>&1 | FileCheck -check-prefix=GX %s
+// GX: "-fcxx-exceptions" "-fexceptions"
+
+// RUN: %clang_cl /TP /c /GX /GX- -### -- %s 2>&1 | FileCheck -check-prefix=GX_ %s
+// GX_-NOT: "-fcxx-exceptions" "-fexceptions"
+
+// RUN: %clang_cl /d1PP -### -- %s 2>&1 | FileCheck -check-prefix=d1PP %s
+// d1PP: -dD
+
+// We forward any unrecognized -W diagnostic options to cc1.
+// RUN: %clang_cl -Wunused-pragmas -### -- %s 2>&1 | FileCheck -check-prefix=WJoined %s
+// WJoined: "-cc1"
+// WJoined: "-Wunused-pragmas"
+
+// We recognize -f[no-]strict-aliasing.
+// RUN: %clang_cl -c -### -- %s 2>&1 | FileCheck -check-prefix=DEFAULTSTRICT %s
+// DEFAULTSTRICT: "-relaxed-aliasing"
+// RUN: %clang_cl -c -fstrict-aliasing -### -- %s 2>&1 | FileCheck -check-prefix=STRICT %s
+// STRICT-NOT: "-relaxed-aliasing"
+// RUN: %clang_cl -c -fno-strict-aliasing -### -- %s 2>&1 | FileCheck -check-prefix=NOSTRICT %s
+// NOSTRICT: "-relaxed-aliasing"
+
+// We recognize -f[no-]delayed-template-parsing.
+// /Zc:twoPhase[-] has the opposite meaning.
+// RUN: %clang_cl -c -### -- %s 2>&1 | FileCheck -check-prefix=DELAYEDDEFAULT %s
+// DELAYEDDEFAULT: "-fdelayed-template-parsing"
+// RUN: %clang_cl -c -fdelayed-template-parsing -### -- %s 2>&1 | FileCheck -check-prefix=DELAYEDON %s
+// RUN: %clang_cl -c /Zc:twoPhase- -### -- %s 2>&1 | FileCheck -check-prefix=DELAYEDON %s
+// DELAYEDON: "-fdelayed-template-parsing"
+// RUN: %clang_cl -c -fno-delayed-template-parsing -### -- %s 2>&1 | FileCheck -check-prefix=DELAYEDOFF %s
+// RUN: %clang_cl -c /Zc:twoPhase -### -- %s 2>&1 | FileCheck -check-prefix=DELAYEDOFF %s
+// DELAYEDOFF-NOT: "-fdelayed-template-parsing"
+
+// For some warning ids, we can map from MSVC warning to Clang warning.
+// RUN: %clang_cl -wd4005 -wd4100 -wd4910 -wd4996 -### -- %s 2>&1 | FileCheck -check-prefix=Wno %s
+// Wno: "-cc1"
+// Wno: "-Wno-macro-redefined"
+// Wno: "-Wno-unused-parameter"
+// Wno: "-Wno-dllexport-explicit-instantiation-decl"
+// Wno: "-Wno-deprecated-declarations"
+
+// Ignored options. Check that we don't get "unused during compilation" errors.
+// RUN: %clang_cl /c \
+// RUN:    /analyze- \
+// RUN:    /bigobj \
+// RUN:    /cgthreads4 \
+// RUN:    /cgthreads8 \
+// RUN:    /d2FastFail \
+// RUN:    /d2Zi+ \
+// RUN:    /errorReport:foo \
+// RUN:    /execution-charset:utf-8 \
+// RUN:    /FC \
+// RUN:    /Fdfoo \
+// RUN:    /FS \
+// RUN:    /Gd \
+// RUN:    /GF \
+// RUN:    /GS- \
+// RUN:    /kernel- \
+// RUN:    /nologo \
+// RUN:    /Og \
+// RUN:    /openmp- \
+// RUN:    /permissive- \
+// RUN:    /RTC1 \
+// RUN:    /sdl \
+// RUN:    /sdl- \
+// RUN:    /source-charset:utf-8 \
+// RUN:    /utf-8 \
+// RUN:    /vmg \
+// RUN:    /volatile:iso \
+// RUN:    /w12345 \
+// RUN:    /wd1234 \
+// RUN:    /Zc:__cplusplus \
+// RUN:    /Zc:auto \
+// RUN:    /Zc:forScope \
+// RUN:    /Zc:inline \
+// RUN:    /Zc:rvalueCast \
+// RUN:    /Zc:ternary \
+// RUN:    /Zc:wchar_t \
+// RUN:    /Zm \
+// RUN:    /Zo \
+// RUN:    /Zo- \
+// RUN:    -### -- %s 2>&1 | FileCheck -check-prefix=IGNORED %s
+// IGNORED-NOT: argument unused during compilation
+// IGNORED-NOT: no such file or directory
+// Don't confuse /openmp- with the /o flag:
+// IGNORED-NOT: "-o" "penmp-.obj"
+
+// Ignored options and compile-only options are ignored for link jobs.
+// RUN: touch %t.obj
+// RUN: %clang_cl /nologo -### -- %t.obj 2>&1 | FileCheck -check-prefix=LINKUNUSED %s
+// RUN: %clang_cl /Dfoo -### -- %t.obj 2>&1 | FileCheck -check-prefix=LINKUNUSED %s
+// RUN: %clang_cl /MD -### -- %t.obj 2>&1 | FileCheck -check-prefix=LINKUNUSED %s
+// LINKUNUSED-NOT: argument unused during compilation
+
+// Support ignoring warnings about unused arguments.
+// RUN: %clang_cl /Abracadabra -Qunused-arguments -### -- %s 2>&1 | FileCheck -check-prefix=UNUSED %s
+// UNUSED-NOT: argument unused during compilation
+
+// Unsupported but parsed options. Check that we don't error on them.
+// (/Zs is for syntax-only)
+// RUN: %clang_cl /Zs \
+// RUN:     /await \
+// RUN:     /constexpr:depth1000 /constexpr:backtrace1000 /constexpr:steps1000 \
+// RUN:     /AIfoo \
+// RUN:     /AI foo_does_not_exist \
+// RUN:     /Bt \
+// RUN:     /Bt+ \
+// RUN:     /clr:pure \
+// RUN:     /docname \
+// RUN:     /EHsc \
+// RUN:     /F \
+// RUN:     /FA \
+// RUN:     /FAc \
+// RUN:     /Fafilename \
+// RUN:     /FAs \
+// RUN:     /FAu \
+// RUN:     /favor:blend \
+// RUN:     /Fifoo \
+// RUN:     /Fmfoo \
+// RUN:     /FpDebug\main.pch \
+// RUN:     /Frfoo \
+// RUN:     /FRfoo \
+// RUN:     /FU foo \
+// RUN:     /Fx \
+// RUN:     /G1 \
+// RUN:     /G2 \
+// RUN:     /GA \
+// RUN:     /Gd \
+// RUN:     /Ge \
+// RUN:     /Gh \
+// RUN:     /GH \
+// RUN:     /GL \
+// RUN:     /GL- \
+// RUN:     /Gm \
+// RUN:     /Gm- \
+// RUN:     /Gr \
+// RUN:     /GS \
+// RUN:     /GT \
+// RUN:     /GX \
+// RUN:     /Gv \
+// RUN:     /Gz \
+// RUN:     /GZ \
+// RUN:     /H \
+// RUN:     /homeparams \
+// RUN:     /hotpatch \
+// RUN:     /JMC \
+// RUN:     /kernel \
+// RUN:     /LN \
+// RUN:     /MP \
+// RUN:     /o foo.obj \
+// RUN:     /ofoo.obj \
+// RUN:     /openmp \
+// RUN:     /Qfast_transcendentals \
+// RUN:     /QIfist \
+// RUN:     /Qimprecise_fwaits \
+// RUN:     /Qpar \
+// RUN:     /Qpar-report:1 \
+// RUN:     /Qsafe_fp_loads \
+// RUN:     /Qspectre \
+// RUN:     /Qvec-report:2 \
+// RUN:     /u \
+// RUN:     /V \
+// RUN:     /volatile:ms \
+// RUN:     /wfoo \
+// RUN:     /WL \
+// RUN:     /Wp64 \
+// RUN:     /X \
+// RUN:     /Y- \
+// RUN:     /Yc \
+// RUN:     /Ycstdafx.h \
+// RUN:     /Yd \
+// RUN:     /Yl- \
+// RUN:     /Ylfoo \
+// RUN:     /Yustdafx.h \
+// RUN:     /Z7 \
+// RUN:     /Za \
+// RUN:     /Ze \
+// RUN:     /Zg \
+// RUN:     /Zi \
+// RUN:     /ZI \
+// RUN:     /Zl \
+// RUN:     /ZW:nostdlib \
+// RUN:     -- %s 2>&1
+
+// We support -Xclang for forwarding options to cc1.
+// RUN: %clang_cl -Xclang hellocc1 -### -- %s 2>&1 | FileCheck -check-prefix=Xclang %s
+// Xclang: "-cc1"
+// Xclang: "hellocc1"
+
+// Files under /Users are often confused with the /U flag. (This could happen
+// for other flags too, but this is the one people run into.)
+// RUN: %clang_cl /c /Users/me/myfile.c -### 2>&1 | FileCheck -check-prefix=SlashU %s
+// SlashU: warning: '/Users/me/myfile.c' treated as the '/U' option
+// SlashU: note: Use '--' to treat subsequent arguments as filenames
+
+// RTTI is on by default. /GR- controls -fno-rtti-data.
+// RUN: %clang_cl /c /GR- -### -- %s 2>&1 | FileCheck -check-prefix=NoRTTI %s
+// NoRTTI: "-fno-rtti-data"
+// NoRTTI-NOT: "-fno-rtti"
+// RUN: %clang_cl /c /GR -### -- %s 2>&1 | FileCheck -check-prefix=RTTI %s
+// RTTI-NOT: "-fno-rtti-data"
+// RTTI-NOT: "-fno-rtti"
+
+// thread safe statics are off for versions < 19.
+// RUN: %clang_cl /c -### -fms-compatibility-version=18 -- %s 2>&1 | FileCheck -check-prefix=NoThreadSafeStatics %s
+// RUN: %clang_cl /Zc:threadSafeInit /Zc:threadSafeInit- /c -### -- %s 2>&1 | FileCheck -check-prefix=NoThreadSafeStatics %s
+// NoThreadSafeStatics: "-fno-threadsafe-statics"
+
+// RUN: %clang_cl /Zc:threadSafeInit /c -### -- %s 2>&1 | FileCheck -check-prefix=ThreadSafeStatics %s
+// ThreadSafeStatics-NOT: "-fno-threadsafe-statics"
+
+// RUN: %clang_cl /Zc:dllexportInlines- /c -### -- %s 2>&1 | FileCheck -check-prefix=NoDllExportInlines %s
+// NoDllExportInlines: "-fno-dllexport-inlines"
+// RUN: %clang_cl /Zc:dllexportInlines /c -### -- %s 2>&1 | FileCheck -check-prefix=DllExportInlines %s
+// DllExportInlines-NOT: "-fno-dllexport-inlines"
+// RUN: %clang_cl /fallback /Zc:dllexportInlines- /c -### -- %s 2>&1 | FileCheck -check-prefix=DllExportInlinesFallback %s
+// DllExportInlinesFallback: error: option '/Zc:dllexportInlines-' is ABI-changing and not compatible with '/fallback'
+
+// RUN: %clang_cl /Zi /c -### -- %s 2>&1 | FileCheck -check-prefix=Zi %s
+// Zi: "-gcodeview"
+// Zi: "-debug-info-kind=limited"
+
+// RUN: %clang_cl /Z7 /c -### -- %s 2>&1 | FileCheck -check-prefix=Z7 %s
+// Z7: "-gcodeview"
+// Z7: "-debug-info-kind=limited"
+
+// RUN: %clang_cl /Zd /c -### -- %s 2>&1 | FileCheck -check-prefix=Z7GMLT %s
+// Z7GMLT: "-gcodeview"
+// Z7GMLT: "-debug-info-kind=line-tables-only"
+
+// RUN: %clang_cl -gline-tables-only /c -### -- %s 2>&1 | FileCheck -check-prefix=ZGMLT %s
+// ZGMLT: "-gcodeview"
+// ZGMLT: "-debug-info-kind=line-tables-only"
+
+// RUN: %clang_cl /c -### -- %s 2>&1 | FileCheck -check-prefix=BreproDefault %s
+// BreproDefault: "-mincremental-linker-compatible"
+
+// RUN: %clang_cl /Brepro- /Brepro /c '-###' -- %s 2>&1 | FileCheck -check-prefix=Brepro %s
+// Brepro-NOT: "-mincremental-linker-compatible"
+
+// RUN: %clang_cl /Brepro /Brepro- /c '-###' -- %s 2>&1 | FileCheck -check-prefix=Brepro_ %s
+// Brepro_: "-mincremental-linker-compatible"
+
+// This test was super sneaky: "/Z7" means "line-tables", but "-gdwarf" occurs
+// later on the command line, so it should win. Interestingly the cc1 arguments
+// came out right, but had wrong semantics, because an invariant assumed by
+// CompilerInvocation was violated: it expects that at most one of {gdwarfN,
+// line-tables-only} appear. If you assume that, then you can safely use
+// Args.hasArg to test whether a boolean flag is present without caring
+// where it appeared. And for this test, it appeared to the left of -gdwarf
+// which made it "win". This test could not detect that bug.
+// RUN: %clang_cl /Z7 -gdwarf /c -### -- %s 2>&1 | FileCheck -check-prefix=Z7_gdwarf %s
+// Z7_gdwarf: "-gcodeview"
+// Z7_gdwarf: "-debug-info-kind=limited"
+// Z7_gdwarf: "-dwarf-version=4"
+
+// RUN: %clang_cl -fmsc-version=1800 -TP -### -- %s 2>&1 | FileCheck -check-prefix=CXX11 %s
+// CXX11: -std=c++11
+
+// RUN: %clang_cl -fmsc-version=1900 -TP -### -- %s 2>&1 | FileCheck -check-prefix=CXX14 %s
+// CXX14: -std=c++14
+
+// RUN: %clang_cl -fmsc-version=1900 -TP -std:c++14 -### -- %s 2>&1 | FileCheck -check-prefix=STDCXX14 %s
+// STDCXX14: -std=c++14
+
+// RUN: %clang_cl -fmsc-version=1900 -TP -std:c++17 -### -- %s 2>&1 | FileCheck -check-prefix=STDCXX17 %s
+// STDCXX17: -std=c++17
+
+// RUN: %clang_cl -fmsc-version=1900 -TP -std:c++latest -### -- %s 2>&1 | FileCheck -check-prefix=STDCXXLATEST %s
+// STDCXXLATEST: -std=c++2a
+
+// RUN: env CL="/Gy" %clang_cl -### -- %s 2>&1 | FileCheck -check-prefix=ENV-CL %s
+// ENV-CL: "-ffunction-sections"
+
+// RUN: env CL="/Gy" _CL_="/Gy- -- %s" %clang_cl -### 2>&1 | FileCheck -check-prefix=ENV-_CL_ %s
+// ENV-_CL_-NOT: "-ffunction-sections"
+
+// RUN: env CL="%s" _CL_="%s" not %clang --rsp-quoting=windows -c
+
+// RUN: %clang_cl -### /c -flto -- %s 2>&1 | FileCheck -check-prefix=LTO %s
+// LTO: -flto
+
+// RUN: %clang_cl -### /c -flto=thin -- %s 2>&1 | FileCheck -check-prefix=LTO-THIN %s
+// LTO-THIN: -flto=thin
+
+// RUN: %clang_cl -### -Fe%t.exe -entry:main -flto -- %s 2>&1 | FileCheck -check-prefix=LTO-WITHOUT-LLD %s
+// LTO-WITHOUT-LLD: LTO requires -fuse-ld=lld
+
+// RUN: %clang_cl  -### -- %s 2>&1 | FileCheck -check-prefix=NOCFGUARD %s
+// RUN: %clang_cl /guard:cf- -### -- %s 2>&1 | FileCheck -check-prefix=NOCFGUARD %s
+// NOCFGUARD-NOT: -cfguard
+
+// RUN: %clang_cl /guard:cf -### -- %s 2>&1 | FileCheck -check-prefix=CFGUARD %s
+// RUN: %clang_cl /guard:cf,nochecks -### -- %s 2>&1 | FileCheck -check-prefix=CFGUARD %s
+// RUN: %clang_cl /guard:nochecks -### -- %s 2>&1 | FileCheck -check-prefix=CFGUARD %s
+// CFGUARD: -cfguard
+
+// RUN: %clang_cl /guard:foo -### -- %s 2>&1 | FileCheck -check-prefix=CFGUARDINVALID %s
+// CFGUARDINVALID: invalid value 'foo' in '/guard:'
+
+// Accept "core" clang options.
+// (/Zs is for syntax-only, -Werror makes it fail hard on unknown options)
+// RUN: %clang_cl \
+// RUN:     --driver-mode=cl \
+// RUN:     -fblocks \
+// RUN:     -fcrash-diagnostics-dir=/foo \
+// RUN:     -fno-crash-diagnostics \
+// RUN:     -fno-blocks \
+// RUN:     -fbuiltin \
+// RUN:     -fno-builtin \
+// RUN:     -fno-builtin-strcpy \
+// RUN:     -fcolor-diagnostics \
+// RUN:     -fno-color-diagnostics \
+// RUN:     -fcoverage-mapping \
+// RUN:     -fno-coverage-mapping \
+// RUN:     -fdiagnostics-color \
+// RUN:     -fno-diagnostics-color \
+// RUN:     -fdiagnostics-parseable-fixits \
+// RUN:     -fdiagnostics-absolute-paths \
+// RUN:     -ferror-limit=10 \
+// RUN:     -fmsc-version=1800 \
+// RUN:     -fno-strict-aliasing \
+// RUN:     -fstrict-aliasing \
+// RUN:     -fsyntax-only \
+// RUN:     -fms-compatibility \
+// RUN:     -fno-ms-compatibility \
+// RUN:     -fms-extensions \
+// RUN:     -fno-ms-extensions \
+// RUN:     -Xclang -disable-llvm-passes \
+// RUN:     -resource-dir asdf \
+// RUN:     -resource-dir=asdf \
+// RUN:     -Wunused-variable \
+// RUN:     -fmacro-backtrace-limit=0 \
+// RUN:     -fstandalone-debug \
+// RUN:     -flimit-debug-info \
+// RUN:     -flto \
+// RUN:     -fmerge-all-constants \
+// RUN:     -no-canonical-prefixes \
+// RUN:     -march=skylake \
+// RUN:     --version \
+// RUN:     -Werror /Zs -- %s 2>&1
+
+// Accept clang options under the /clang: flag.
+// The first test case ensures that the SLP vectorizer is on by default and that
+// it's being turned off by the /clang:-fno-slp-vectorize flag.
+
+// RUN: %clang_cl -O2 -### -- %s 2>&1 | FileCheck -check-prefix=NOCLANG %s
+// NOCLANG: "--dependent-lib=libcmt"
+// NOCLANG-SAME: "-vectorize-slp"
+// NOCLANG-NOT: "--dependent-lib=msvcrt"
+
+// RUN: %clang_cl -O2 -MD /clang:-fno-slp-vectorize /clang:-MD /clang:-MF /clang:my_dependency_file.dep -### -- %s 2>&1 | FileCheck -check-prefix=CLANG %s
+// CLANG: "--dependent-lib=msvcrt"
+// CLANG-SAME: "-dependency-file" "my_dependency_file.dep"
+// CLANG-NOT: "--dependent-lib=libcmt"
+// CLANG-NOT: "-vectorize-slp"
+
+void f() { }