Add several testcases for new optimizations in the code generator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19244 91177308-0d34-0410-b5e6-96231b3b80d8

Expose isConvertibleToThreeAddress and isCommutable bits to the code generator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19243 91177308-0d34-0410-b5e6-96231b3b80d8

Add some bits that can be set on instructions.  Renumber existing bits so
they are dense.  Add a virtual method that targets can choose to implement.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19242 91177308-0d34-0410-b5e6-96231b3b80d8

Add some bits that can be set for instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19241 91177308-0d34-0410-b5e6-96231b3b80d8

Make printing a warning message optional in CheckBytecodeOutputToConsole.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19240 91177308-0d34-0410-b5e6-96231b3b80d8

Prevent output of bytecode to std::cout unless the --force flag is given.
This prevents bytecode splats with usage like: cat file.ll | llvm-as -

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19239 91177308-0d34-0410-b5e6-96231b3b80d8

Move the code for printing out a warning about bytecode output to a console
into lib/Support so it can be used with other tools.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19238 91177308-0d34-0410-b5e6-96231b3b80d8

Implement a function to print a warning if bytecode output is to be sent to
a terminal/console.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19237 91177308-0d34-0410-b5e6-96231b3b80d8

Add functions for determining if the stdin/out/err is connected to a
console or not.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19236 91177308-0d34-0410-b5e6-96231b3b80d8

Add llvm-link, Linker projects to Visual Studio.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19235 91177308-0d34-0410-b5e6-96231b3b80d8

Add missing header files to projects.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19234 91177308-0d34-0410-b5e6-96231b3b80d8

Add functions for determining if the stdin/out/err is connected to a
console or not.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19233 91177308-0d34-0410-b5e6-96231b3b80d8

Fix typo 'ompress' => 'compress'.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19232 91177308-0d34-0410-b5e6-96231b3b80d8

Add llvm-ranlib project to Visual Studio.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19231 91177308-0d34-0410-b5e6-96231b3b80d8

Add llvm-ar project to Visual Studio.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19230 91177308-0d34-0410-b5e6-96231b3b80d8

Add -v option to bison.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19229 91177308-0d34-0410-b5e6-96231b3b80d8

Add missing file SystemUtils.cpp to Support project.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19228 91177308-0d34-0410-b5e6-96231b3b80d8

Add llvm-as project to Visual Studio

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19227 91177308-0d34-0410-b5e6-96231b3b80d8

Add llvm-dis project to Visual Studio

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19226 91177308-0d34-0410-b5e6-96231b3b80d8

Put executables into a single directory

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19225 91177308-0d34-0410-b5e6-96231b3b80d8

Fix bountiful sources of VC++ 'possible loss of data' warnings

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19224 91177308-0d34-0410-b5e6-96231b3b80d8

Improve TableGen dependencies
Move TableGen generated files out of the src tree
Add descriptions to the custom build steps

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19223 91177308-0d34-0410-b5e6-96231b3b80d8

Add HAVE_SBRK

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19222 91177308-0d34-0410-b5e6-96231b3b80d8

Ignore some files

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19221 91177308-0d34-0410-b5e6-96231b3b80d8

This is a bulk commit that implements the following primary improvements:
  * We can now fold cast instructions into select instructions that
    have at least one constant operand.
  * We now optimize expressions more aggressively based on bits that are
    known to be zero.  These optimizations occur a lot in code that uses
    bitfields even in simple ways.
  * We now turn more cast-cast sequences into AND instructions.  Before we
    would only do this if it if all types were unsigned.  Now only the
    middle type needs to be unsigned (guaranteeing a zero extend).
  * We transform sign extensions into zero extensions in several cases.

This corresponds to these test/Regression/Transforms/InstCombine testcases:
  2004-11-22-Missed-and-fold.ll
  and.ll: test28-29
  cast.ll: test21-24
  and-or-and.ll
  cast-cast-to-and.ll
  zeroext-and-reduce.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19220 91177308-0d34-0410-b5e6-96231b3b80d8

New testcases that we should combine.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19219 91177308-0d34-0410-b5e6-96231b3b80d8

New testcase for common bitfield manipulation instruction sequences.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19218 91177308-0d34-0410-b5e6-96231b3b80d8

Add a bunch of tests for cases that should be eliminated.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19217 91177308-0d34-0410-b5e6-96231b3b80d8

Add a bunch of tests for ANDs that should be eliminated.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19216 91177308-0d34-0410-b5e6-96231b3b80d8

This now works.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19215 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a FIXME: Select instructions on longs were miscompiled.

While we're at it, improve codegen of select instructions.  For this
testcase:

int %test(bool %C, int %A, int %B) {
  %D = select bool %C, int %A, int %B
  ret int %D
}

We used to generate this code:

_test:
        cmpwi cr0, r3, 0
        bne .LBB_test_2 ;
.LBB_test_1:    ;
        b .LBB_test_3   ;
.LBB_test_2:    ;
        or r5, r4, r4
.LBB_test_3:    ;
        or r3, r5, r5
        blr

Now we emit:

_test:
        cmpwi cr0, r3, 0
        bne .LBB_test_2 ;
.LBB_test_1:    ;
        or r4, r5, r5
.LBB_test_2:    ;
        or r3, r4, r4
        blr

-Chris

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19214 91177308-0d34-0410-b5e6-96231b3b80d8

Substantially improve the code generated by non-folded setcc instructions.
In particular, instead of compiling this:

bool %test(int %A, int %B) {
  %C = setlt int %A, %B
  ret bool %C
}

to this:

test:
        save %sp, -96, %sp
        subcc %i0, %i1, %g0
        bl .LBBtest_1   !
        nop
        ba .LBBtest_2   !
        nop
.LBBtest_1:     !
        or %g0, 1, %i0
        ba .LBBtest_3   !
        nop
.LBBtest_2:     !
        or %g0, 0, %i0
        ba .LBBtest_3   !
        nop
.LBBtest_3:     !
        restore %g0, %g0, %g0
        retl
        nop

We now compile it to this:

test:
        save %sp, -96, %sp
        subcc %i0, %i1, %g0
        or %g0, 1, %i0
        bl .LBBtest_2   !
        nop
.LBBtest_1:     !
        or %g0, %g0, %i0
.LBBtest_2:     !
        restore %g0, %g0, %g0
        retl
        nop

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19213 91177308-0d34-0410-b5e6-96231b3b80d8

Implement SimplifyCFG/DeadSetCC.ll

SimplifyCFG is one of those passes that we use for final cleanup: it should
not rely on other passes to clean up its garbage.  This fixes the "why are
trivially dead setcc's in the output of gccas" problem.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19212 91177308-0d34-0410-b5e6-96231b3b80d8

Add new test to make sure simplifycfg doesn't leave around trivially
dead instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19211 91177308-0d34-0410-b5e6-96231b3b80d8

Allow getZeroExtend and getSignExtend to work with boolean inputs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19210 91177308-0d34-0410-b5e6-96231b3b80d8

Add a useful accessor

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19209 91177308-0d34-0410-b5e6-96231b3b80d8

Add two helper functions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19208 91177308-0d34-0410-b5e6-96231b3b80d8

Update to autoconf 2.59 standards.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19207 91177308-0d34-0410-b5e6-96231b3b80d8

Correct the conditional test for non-portable tools so that it will
correctly omit them for non-Unix operating systems.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19206 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
Make LLVM_ON_UNIX and LLVM_ON_WIN32 available in the makefiles

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19205 91177308-0d34-0410-b5e6-96231b3b80d8

Describe both objdir==srcdir and objdir!=srcdir methods of building LLVM
libraries and tools. Thanks to Henrik Bach for this suggestion.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19204 91177308-0d34-0410-b5e6-96231b3b80d8

Where do these tabs keep coming from???

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19203 91177308-0d34-0410-b5e6-96231b3b80d8

Mostly cleanup, but also some bug fixes, for win32/Path.cpp

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19202 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a compilation error for the case where mallinfo() is not available.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19201 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* lib/System depends on sbrk(3), make sure we check for it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19200 91177308-0d34-0410-b5e6-96231b3b80d8

Get rid of those nasty tabs...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19199 91177308-0d34-0410-b5e6-96231b3b80d8

Bring win32/Path.cpp up to date with respect to Unix/Path.cpp

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19198 91177308-0d34-0410-b5e6-96231b3b80d8

* Add missing libraries: Linker, Archive, SparcV8
* Make library descriptions consistently lower case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19197 91177308-0d34-0410-b5e6-96231b3b80d8

* Don't include weak definitions as a definition
* Make subordinate libraries presented with a vertical list instead of all
  listed on a single line.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19196 91177308-0d34-0410-b5e6-96231b3b80d8

Add a section on library dependencies now that GenLibDeps.html is written.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19195 91177308-0d34-0410-b5e6-96231b3b80d8

A Perl script to generate an HTML definition list containing the LLVM
library dependencies, for documentation purposes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19194 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the help documentation to not imply multiple archive files can be
processed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19193 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* Place a try/catch block around the entire tool to Make sure std::string
  exceptions are caught and printed before exiting the tool.
* Make sure we catch unhandled exceptions at the top level so that we don't
  abort with a useless message but indicate than an unhandled exception was
  generated.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19192 91177308-0d34-0410-b5e6-96231b3b80d8

Fix MINGW compilation errors

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19190 91177308-0d34-0410-b5e6-96231b3b80d8

* Fix a bug in an m4 macro that used an incorrect test operator
* Add CAN_DLOPEN_SELF so we can determine if dlopen(0) will open the
  program or not.
* Correct a warning messages to be a little more specific on what it checks

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19184 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a Bourne Shell syntax error in a test

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19183 91177308-0d34-0410-b5e6-96231b3b80d8

Fix one of the names to not have a . in front of it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19182 91177308-0d34-0410-b5e6-96231b3b80d8

Bug fixed

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19181 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR491 and testcase Transforms/DeadStoreElimination/2004-12-28-PartialStore.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19180 91177308-0d34-0410-b5e6-96231b3b80d8

Add a comment, add a new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19179 91177308-0d34-0410-b5e6-96231b3b80d8

New testcase for PR491

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19178 91177308-0d34-0410-b5e6-96231b3b80d8

Bug fixed

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19177 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR490
Fix testcase CodeGen/CBackend/2004-12-28-LogicalConstantExprs.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19176 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase for PR490

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19175 91177308-0d34-0410-b5e6-96231b3b80d8

XFAIL this test everywhere.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19174 91177308-0d34-0410-b5e6-96231b3b80d8

XFAIL this everywhere, the CFE doesn't support bitfield initialization.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19173 91177308-0d34-0410-b5e6-96231b3b80d8

Remove potential platform portability issue with size of "int".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19172 91177308-0d34-0410-b5e6-96231b3b80d8

Correct the name of the variable for the LLVM examples directory so that
parallel builds don't attempt to create it twice.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19171 91177308-0d34-0410-b5e6-96231b3b80d8

Make the x86_64 target names match between def and use. Thanks Misha.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19170 91177308-0d34-0410-b5e6-96231b3b80d8

Make the 64-bit x86 target named "x86_64" instead of "AMD64".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19169 91177308-0d34-0410-b5e6-96231b3b80d8

Add a note about registering the backend so it's available in LLC and LLI

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19168 91177308-0d34-0410-b5e6-96231b3b80d8

Bring VS projects up to date with respect to recent changes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19167 91177308-0d34-0410-b5e6-96231b3b80d8

Don't create symbolic links for lib/System any more. It doesn't need them.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19166 91177308-0d34-0410-b5e6-96231b3b80d8

Clean up some autoconf cruft
* Make the source detection use a file unique to Stacker
* Configure Makefile.common.in with AC_CONFIG_FILES not AC_CONFIG_MAKEFILE
* Use new autoconf format for invoking AC_OUTPUT

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19165 91177308-0d34-0410-b5e6-96231b3b80d8

Make it possible to reconfigure a project as well as just LLVM main dir.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19164 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a bug that made the nightly tester *really* slow. During changes for
portability, the --track-space option was inadvertently ignored. This patch
fixes that so that sys::Process::GetMallocUsage() is only invoked if the
--track-spaces option is given. Apparently the mallinfo() call that
GetMallocUsage() uses is *very* slow, especially when processing very large
modules like projects/llvm-test/MultiSource/Applications/kimwitu++.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19163 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* sys::PreventCoreFiles -> sys::Process::PreventCoreFiles

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19162 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* Ensure #includes are wrapped with appropriate HAVE_ guards
* Account for variations in time.h and sys/time.h inclusion.
* Add macros for getting wait(2) exit status correctly (per autoconf sugg.)
* Implement ThrowErrno in terms of strerror_r, strerror or none based on
  what is available on the platform.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19161 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* Remove redundant #includes that are now in Unix.h

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19160 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* Move implementation of sys::PreventCoreFiles function to this file from
  the now defunct SysConfig abstraction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19159 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* Ensure #includes are wrapped with appropriate HAVE_ guards
* Ensure variations in "dirent" structure are accounted for.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19158 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* Ensure #includes are wrapped with appropriate HAVE_ guards
* Consolidate implementation from operating system specific directory.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19157 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* Ensure #includes are wrapped with appropriate HAVE_ guards

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19156 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* Consolidate implementation for Unix systems into Unix/TimeValue.cpp
* Avoid use of symbolic link to #include platform-specific implementation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19155 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* Consolidate implementation for Unix systems into Unix/Program.cpp
* Avoid use of symbolic link to #include platform-specific implementation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19154 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* Consolidate implementation for Unix systems into Unix/Signals.cpp
* Avoid use of symbolic link to #include platform-specific implementation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19153 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* Consolidate implementation for Unix systems into Unix/Memory.cpp
* Avoid use of symbolic link to #include platform-specific implementation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19152 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* Consolidate implementation for Unix systems into Unix/MappedFile.cpp
* Avoid use of symbolic link to #include platform-specific implementation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19151 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* Consolidate implementation for Unix systems into Unix/Process.cpp
* Avoid use of symbolic link to #include platform-specific implementation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19150 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
SysConf abstraction was pointless because it had a single function in it that
pertained only to the current process. So merge it into the Process abstraction
and remove the files completely.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19149 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* Add checks for sterror and strerror_r functions
* Add check to determine if /dev/zero is needed for allocating RWX memory.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19148 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
Provide a check to determine if /dev/zero is needed for AllocateRWX function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19147 91177308-0d34-0410-b5e6-96231b3b80d8

Oops, reverse the logic on a test for WITH_LLVMGCCDIR to make it define
the path names correctly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19146 91177308-0d34-0410-b5e6-96231b3b80d8

Provide a value for HAVE_MMAP_ANONYMOUS variable, for consistency with
other #define's.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19145 91177308-0d34-0410-b5e6-96231b3b80d8

Describe the --with-llvmgccdir option to configure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19144 91177308-0d34-0410-b5e6-96231b3b80d8

Revert the last patch so that the LLVMGCCDIR environment variable is
still viable and will make use of the resurrected --with-llvmgccdir
configure option.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19143 91177308-0d34-0410-b5e6-96231b3b80d8

For PR351:
* Make sure all headers used by lib/System have checks
* Use "standard" autoconf checks for certain problematic headers
For PR432:
* Resurrect --with-llvmgccdir so a specific llvm-gcc/llvm-g++ installation
  can be specified.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19142 91177308-0d34-0410-b5e6-96231b3b80d8

mingw doesn't support the official debug API.

Old versions of the C runtime somehow get loaded into the process.  Make
sure they aren't searched for symbols.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19141 91177308-0d34-0410-b5e6-96231b3b80d8

Get VC++ building again

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19140 91177308-0d34-0410-b5e6-96231b3b80d8

Ignore the autom4te.cache directoy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19139 91177308-0d34-0410-b5e6-96231b3b80d8