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16644 Commits

Author SHA1 Message Date
Chris Lattner 295e45e60e Two changes here: 
1. Add new instructions for checking parity flags: JP, JNP, SETP, SETNP.
2. Set the isCommutable and isPromotableTo3Address bits on several
   instructions.

llvm-svn: 19246
 2005-01-02 02:35:46 +00:00
Chris Lattner 9590870a0d Make the 2-address instruction lowering pass smarter in two ways: 
1. If we are two-addressing a commutable instruction and the LHS is not the
   last use of the variable, see if the instruction is the last use of the
   RHS.  If so, commute the instruction, allowing us to avoid a
   register-register copy in many cases for common instructions like ADD, OR,
   AND, etc on X86.
2. If #1 doesn't hold, and if this is an instruction that also existing in
   3-address form, promote the instruction to a 3-address instruction to
   avoid the register-register copy.  We can do this for several common
   instructions in X86, including ADDrr, INC, DEC, etc.

This patch implements test/Regression/CodeGen/X86/commute-two-addr.ll,
overlap-add.ll, and overlap-shift.ll when I check in the X86 support for it.

llvm-svn: 19245
 2005-01-02 02:34:12 +00:00
Chris Lattner 835ae42300 Add several testcases for new optimizations in the code generator. 
llvm-svn: 19244
 2005-01-02 02:30:04 +00:00
Chris Lattner 733c82bfbf Expose isConvertibleToThreeAddress and isCommutable bits to the code generator. 
llvm-svn: 19243
 2005-01-02 02:29:04 +00:00
Chris Lattner a1a6be7e6e 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.

llvm-svn: 19242
 2005-01-02 02:28:31 +00:00
Chris Lattner 182db0cac0 Add some bits that can be set for instructions. 
llvm-svn: 19241
 2005-01-02 02:27:48 +00:00
Reid Spencer 4e8dd44733 Make printing a warning message optional in CheckBytecodeOutputToConsole. 
llvm-svn: 19240
 2005-01-02 00:10:03 +00:00
Reid Spencer 742af2f2eb 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 -

llvm-svn: 19239
 2005-01-02 00:08:46 +00:00
Reid Spencer c967184a50 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.

llvm-svn: 19238
 2005-01-01 23:57:01 +00:00
Reid Spencer 1263cfd14f Implement a function to print a warning if bytecode output is to be sent to 
a terminal/console.

llvm-svn: 19237
 2005-01-01 23:56:20 +00:00
Jeff Cohen b90c31fb49 Add functions for determining if the stdin/out/err is connected to a 
console or not.

llvm-svn: 19236
 2005-01-01 22:54:05 +00:00
Jeff Cohen e98c7b6f26 Add llvm-link, Linker projects to Visual Studio. 
llvm-svn: 19235
 2005-01-01 22:32:26 +00:00
Jeff Cohen 8db20fe964 Add missing header files to projects. 
llvm-svn: 19234
 2005-01-01 22:30:19 +00:00
Reid Spencer 6f802ba876 Add functions for determining if the stdin/out/err is connected to a 
console or not.

llvm-svn: 19233
 2005-01-01 22:29:26 +00:00
Jeff Cohen ca7d19e2af Fix typo 'ompress' => 'compress'. 
llvm-svn: 19232
 2005-01-01 22:10:32 +00:00
Jeff Cohen b06a83e285 Add llvm-ranlib project to Visual Studio. 
llvm-svn: 19231
 2005-01-01 22:05:56 +00:00
Jeff Cohen 5c3261e5f2 Add llvm-ar project to Visual Studio. 
llvm-svn: 19230
 2005-01-01 22:00:28 +00:00
Jeff Cohen 16034813e6 Add -v option to bison. 
llvm-svn: 19229
 2005-01-01 21:35:39 +00:00
Jeff Cohen 49123973f8 Add missing file SystemUtils.cpp to Support project. 
llvm-svn: 19228
 2005-01-01 21:34:18 +00:00
Jeff Cohen 1d2912470a Add llvm-as project to Visual Studio 
llvm-svn: 19227
 2005-01-01 20:51:41 +00:00
Jeff Cohen 980d6098b6 Add llvm-dis project to Visual Studio 
llvm-svn: 19226
 2005-01-01 20:18:03 +00:00
Jeff Cohen 08f30c0c33 Put executables into a single directory 
llvm-svn: 19225
 2005-01-01 19:37:14 +00:00
Jeff Cohen 4560c21dd2 Fix bountiful sources of VC++ 'possible loss of data' warnings 
llvm-svn: 19224
 2005-01-01 18:58:23 +00:00
Jeff Cohen 031c3d891c Improve TableGen dependencies 
Move TableGen generated files out of the src tree
Add descriptions to the custom build steps

llvm-svn: 19223
 2005-01-01 18:17:40 +00:00
Reid Spencer 3b8faf995d Add HAVE_SBRK 
llvm-svn: 19222
 2005-01-01 18:16:16 +00:00
Reid Spencer 9f0ce1772c Ignore some files 
llvm-svn: 19221
 2005-01-01 18:14:18 +00:00
Chris Lattner 86102b8ad5 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

llvm-svn: 19220
 2005-01-01 16:22:27 +00:00
Chris Lattner da15d4ba49 New testcases that we should combine. 
llvm-svn: 19219
 2005-01-01 16:14:46 +00:00
Chris Lattner 584e38313b New testcase for common bitfield manipulation instruction sequences. 
llvm-svn: 19218
 2005-01-01 16:14:18 +00:00
Chris Lattner 421477885f Add a bunch of tests for cases that should be eliminated. 
llvm-svn: 19217
 2005-01-01 16:13:43 +00:00
Chris Lattner 329d0255ae Add a bunch of tests for ANDs that should be eliminated. 
llvm-svn: 19216
 2005-01-01 16:13:19 +00:00
Chris Lattner ea4c66a083 This now works. 
llvm-svn: 19215
 2005-01-01 16:12:52 +00:00
Chris Lattner 83df5d25b7 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

llvm-svn: 19214
 2005-01-01 16:10:12 +00:00
Chris Lattner 78394258ae 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

llvm-svn: 19213
 2005-01-01 16:06:57 +00:00
Chris Lattner 3215bb6049 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.

llvm-svn: 19212
 2005-01-01 16:02:12 +00:00
Chris Lattner 21adf7d36e Add new test to make sure simplifycfg doesn't leave around trivially 
dead instructions.

llvm-svn: 19211
 2005-01-01 16:00:56 +00:00
Chris Lattner 1ece6f83ba Allow getZeroExtend and getSignExtend to work with boolean inputs. 
llvm-svn: 19210
 2005-01-01 15:59:57 +00:00
Chris Lattner 3196de7663 Add a useful accessor 
llvm-svn: 19209
 2005-01-01 15:58:55 +00:00
Chris Lattner 094e8b660b Add two helper functions. 
llvm-svn: 19208
 2005-01-01 15:58:41 +00:00
Reid Spencer 97d6cf262f Update to autoconf 2.59 standards. 
llvm-svn: 19207
 2005-01-01 09:26:55 +00:00
Reid Spencer 948499e820 Correct the conditional test for non-portable tools so that it will 
correctly omit them for non-Unix operating systems.

llvm-svn: 19206
 2004-12-31 22:56:14 +00:00
Reid Spencer d7287e05e3 For PR351: 
Make LLVM_ON_UNIX and LLVM_ON_WIN32 available in the makefiles

llvm-svn: 19205
 2004-12-31 22:54:28 +00:00
Reid Spencer cdf4d46551 Describe both objdir==srcdir and objdir!=srcdir methods of building LLVM 
libraries and tools. Thanks to Henrik Bach for this suggestion.

llvm-svn: 19204
 2004-12-31 19:48:59 +00:00
Jeff Cohen b6ecaa2d1c Where do these tabs keep coming from??? 
llvm-svn: 19203
 2004-12-31 19:03:31 +00:00
Jeff Cohen 25dcdcc973 Mostly cleanup, but also some bug fixes, for win32/Path.cpp 
llvm-svn: 19202
 2004-12-31 19:01:08 +00:00
Reid Spencer 0f371a1637 Fix a compilation error for the case where mallinfo() is not available. 
llvm-svn: 19201
 2004-12-31 05:53:27 +00:00
Reid Spencer 0fcca1262b For PR351: 
* lib/System depends on sbrk(3), make sure we check for it.

llvm-svn: 19200
 2004-12-31 05:49:15 +00:00
Jeff Cohen 63f13c4cbc Get rid of those nasty tabs... 
llvm-svn: 19199
 2004-12-31 05:07:26 +00:00
Jeff Cohen 98aff88c9b Bring win32/Path.cpp up to date with respect to Unix/Path.cpp 
llvm-svn: 19198
 2004-12-31 04:39:07 +00:00
Reid Spencer 234dc34c77 * Add missing libraries: Linker, Archive, SparcV8 
* Make library descriptions consistently lower case.

llvm-svn: 19197
 2004-12-31 00:13:14 +00:00