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83 Commits

Author SHA1 Message Date
Benjamin Kramer 2b76c66fd6 Add constant folding for strspn and strcspn to SimplifyLibCalls. 
llvm-svn: 115116
 2010-09-30 00:58:35 +00:00
Benjamin Kramer 38d22f69fc Add strpbrk folding to SimplifyLibCalls. 
llvm-svn: 115111
 2010-09-29 23:52:12 +00:00
Benjamin Kramer 8e861d7eee Simplify the loop in StrChrOptimizer. FileCheckize test. 
llvm-svn: 115095
 2010-09-29 22:29:12 +00:00
Benjamin Kramer 824645abc9 Teach SimplifyLibCalls how to optimize strrchr. 
llvm-svn: 115091
 2010-09-29 21:50:51 +00:00
Rafael Espindola a20e2dfe86 Make sure that simplify libcalls does not replace a call with one calling 
convention with a new call with a different calling convention.

llvm-svn: 106134
 2010-06-16 19:34:01 +00:00
Benjamin Kramer a13bd20396 simplify-libcalls: fold strncmp(x, y, 1) -> memcmp(x, y, 1) 
The memcmp will be optimized further and even the pathological case
'strstr(x, "x") == x' generates optimal code now.

llvm-svn: 106097
 2010-06-16 10:30:29 +00:00
Benjamin Kramer 1118860e3a simplify-libcalls: fold strstr(a, b) == a -> strncmp(a, b, strlen(b)) == 0 
llvm-svn: 106047
 2010-06-15 21:34:25 +00:00
Nick Lewycky aee2632be3 The memcpy intrinsic only takes i8* for %src and %dst, so cast them to that 
first. Fixes PR7265.

llvm-svn: 105206
 2010-05-31 06:16:35 +00:00
Benjamin Kramer 9439084cea Properly promote operands when optimizing a single-character memcmp. 
llvm-svn: 104648
 2010-05-25 22:53:43 +00:00
Mon P Wang c576ee9040 Reapply address space patch after fixing an issue in MemCopyOptimizer. 
Added support for address spaces and added a isVolatile field to memcpy, memmove, and memset,
e.g., llvm.memcpy.i32(i8*, i8*, i32, i32) -> llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)

llvm-svn: 100304
 2010-04-04 03:10:48 +00:00
Mon P Wang 999c1b927b Revert r100191 since it breaks objc in clang 
llvm-svn: 100199
 2010-04-02 18:43:02 +00:00
Mon P Wang a972ab8564 Reapply address space patch after fixing an issue in MemCopyOptimizer. 
Added support for address spaces and added a isVolatile field to memcpy, memmove, and memset,
e.g., llvm.memcpy.i32(i8*, i8*, i32, i32) -> llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)

llvm-svn: 100191
 2010-04-02 18:04:15 +00:00
Bob Wilson 6f7fd28824 Revert Mon Ping's change 99928, since it broke all the llvm-gcc buildbots. 
llvm-svn: 99948
 2010-03-30 22:27:04 +00:00
Mon P Wang 7460571381 Added support for address spaces and added a isVolatile field to memcpy, memmove, and memset, 
e.g., llvm.memcpy.i32(i8*, i8*, i32, i32) -> llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
A update of langref will occur in a subsequent checkin.

llvm-svn: 99928
 2010-03-30 20:55:56 +00:00
Evan Cheng d9e822345c Teach simplify libcall to transform __strcpy_chk to __memcpy_chk to enable optimizations down stream. 
llvm-svn: 99282
 2010-03-23 15:48:04 +00:00
Eric Christopher a7fb58f5f5 Migrate _chk call lowering from SimplifyLibCalls to InstCombine. Stub 
out the remainder of the calls that we should lower in some way and
move the tests to the new correct directory. Fix up tests that are now
optimized more than they were before by -instcombine.

llvm-svn: 97875
 2010-03-06 10:50:38 +00:00
Evan Cheng d214ed0e75 Safely turn memset_chk etc. to non-chk variant if the known object size is >= memset / memcpy / memmove size. 
llvm-svn: 97828
 2010-03-05 20:59:47 +00:00
Eric Christopher d86233c118 Recommit this, looks like it wasn't the cause. 
llvm-svn: 95165
 2010-02-03 00:21:58 +00:00
Eric Christopher e67d01a9a8 Hopefully temporarily revert this. 
llvm-svn: 95154
 2010-02-02 23:01:31 +00:00
Eric Christopher 4264e7e46f Re-add strcmp and known size object size checking optimization. 
Passed bootstrap and nightly test run here.

llvm-svn: 95145
 2010-02-02 22:10:43 +00:00
Eric Christopher 5a0e174863 Revert my last couple of patches. They appear to have broken bison. 
llvm-svn: 94841
 2010-01-29 21:16:24 +00:00
Eric Christopher 9b3c02b7da Make strcpy_chk lower to strcpy if we have a safe size. 
llvm-svn: 94783
 2010-01-29 01:37:11 +00:00
Chris Lattner 1a32ede6fd move an optimization for memcmp out of simplifylibcalls and into 
SDISel.  This optimization was causing simplifylibcalls to 
introduce type-unsafe nastiness.  This is the first step, I'll be 
expanding the memcmp optimizations shortly, covering things that
we really really wouldn't want simplifylibcalls to do.

llvm-svn: 92098
 2009-12-24 00:37:38 +00:00
Chris Lattner f278addbdc reapply my strstr optimization. I have reproduced the x86-64 bootstrap 
miscompile (i386.o miscompares) but it happens both with and without
this patch.

llvm-svn: 91532
 2009-12-16 09:32:05 +00:00
Chris Lattner 177be32334 revert my strstr optimization, I'm told it breaks x86-64 bootstrap. 
Will reapply with a fix when I get a chance.

llvm-svn: 91486
 2009-12-16 00:46:02 +00:00
Chris Lattner 26ab363361 optimize strstr, PR5783 
llvm-svn: 91438
 2009-12-15 19:14:40 +00:00
Benjamin Kramer b971445ab7 Teach SimplifyLibCalls to fold memcmp calls with constant arguments. 
llvm-svn: 86141
 2009-11-05 17:44:22 +00:00
Dan Gohman 62995c71a2 Fix SimplifyLibCalls to transfer attributes from callees rather than 
calls, since direct calls don't always reflect the attributes of their
callees.

llvm-svn: 82867
 2009-09-26 18:10:13 +00:00
Dan Gohman 48f7da742a I put the wrong rdar number in this test. 
llvm-svn: 82829
 2009-09-26 01:11:57 +00:00
Dan Gohman 5ffd53892d Transform pow(x, 0.5) to (x == -inf ? inf : fabs(sqrt(x))), which is 
typically faster then doing a general pow.

llvm-svn: 82819
 2009-09-25 23:10:17 +00:00
Dan Gohman 1880092722 Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 
input filename so that opt doesn't print the input filename in the
output so that grep lines in the tests don't unintentionally match
strings in the input filename.

llvm-svn: 81537
 2009-09-11 18:01:28 +00:00
Dan Gohman 72a13d2476 Use opt -S instead of piping bitcode output through llvm-dis. 
llvm-svn: 81257
 2009-09-08 22:34:10 +00:00
Dan Gohman 9737a63ed8 Change these tests to feed the assembly files to opt directly, instead 
of using llvm-as, now that opt supports this.

llvm-svn: 81226
 2009-09-08 16:50:01 +00:00
Daniel Dunbar b9ea94c990 Eliminate uses of %prcontext. 
- I'd appreciate it if someone else eyeballs my changes to make sure I captured
   the intent of the test.

llvm-svn: 81083
 2009-09-05 11:35:16 +00:00
Chris Lattner 27266f164f In C++, code is not allowed to call main. In C it is, this 
simplifylibcalls optimization is thus valid for C++ but not C.
It's not important enough to worry about for C++ apps, so just
remove it.

rdar://7191924

llvm-svn: 80887
 2009-09-03 05:19:59 +00:00
Dan Gohman 6e32e5cf0c Add targetdata strings to these tests, since SimplifyLibCalls uses 
TargetData to find the pointer size.

llvm-svn: 79490
 2009-08-19 23:18:49 +00:00
Dan Gohman dea2358c68 Fix SimplifyLibcalls and ValueTracking to check mayBeOverridden 
before performing optimizations based on constant string values.

llvm-svn: 79384
 2009-08-19 00:11:12 +00:00
Daniel Dunbar 98ddd164d8 Fix PR4645 which was fallout from the fix for PR4641. 
- Call RAUW to delete all instructions (this is a patch from Nick Lewycky).

llvm-svn: 77512
 2009-07-29 22:00:43 +00:00
Nick Lewycky 013c8e5474 Just discard the output, no need to turn it back into text. 
llvm-svn: 77439
 2009-07-29 06:14:52 +00:00
Chris Lattner 1d3defa392 don't dump .bc file to stdout, and simplify this to a trivial testcase. 
llvm-svn: 77436
 2009-07-29 05:32:07 +00:00
Nick Lewycky f82326b984 Bulk erasing instructions without RAUWing them is unsafe. Instead, break them 
into a new BB that has no predecessors.

llvm-svn: 77433
 2009-07-29 05:17:50 +00:00
Eli Friedman ff9bf97ceb Fix simplifylibcalls memset recognition to work on 64-bit platforms 
where int is 32 bits.

llvm-svn: 76293
 2009-07-18 08:34:51 +00:00
Chris Lattner 87a222c5c8 part of PR4405: disable a contentious optimization for 
strcmp -> memcmp when the lengths of the strings are unknown.

Patch by Nick Lewycky!

llvm-svn: 73751
 2009-06-19 04:17:36 +00:00
Dan Gohman a5b9645c4b Split the Add, Sub, and Mul instruction opcodes into separate 
integer and floating-point opcodes, introducing
FAdd, FSub, and FMul.

For now, the AsmParser, BitcodeReader, and IRBuilder all preserve
backwards compatability, and the Core LLVM APIs preserve backwards
compatibility for IR producers. Most front-ends won't need to change
immediately.

This implements the first step of the plan outlined here:
http://nondot.org/sabre/LLVMNotes/IntegerOverflow.txt

llvm-svn: 72897
 2009-06-04 22:49:04 +00:00
Chris Lattner 221895303c fix PR4284, a bug in simplifylibcalls handling memcmp. Patch by 
Benjamin Kramer!

llvm-svn: 72625
 2009-05-30 18:43:04 +00:00
Chris Lattner 7e335a763a Fix PR4206 - crash in simplify lib calls 
llvm-svn: 71644
 2009-05-13 06:26:11 +00:00
Chris Lattner 91b6af24ac add some optimizations for strncpy/strncat and factor some 
code.  Patch by Benjamin Kramer!

llvm-svn: 68885
 2009-04-12 05:06:39 +00:00
Ed Schouten 01aa6ec97a Let the strcat optimizer return the pointer to the start of the buffer, 
instead of the place where it started to perform the string copy.

- PR3661
- Patch by Benjamin Kramer!

llvm-svn: 68443
 2009-04-06 13:06:48 +00:00
Nick Lewycky d234a845f9 Mark strto* as readonly when the endptr is null. 
llvm-svn: 64460
 2009-02-13 17:08:33 +00:00
Nick Lewycky a0e83a0952 On strtod and friends, mark 'endptr' nocapture in the function prototype, and 
mark the first argument nocapture if endptr=NULL for each particular call.

llvm-svn: 64453
 2009-02-13 15:31:46 +00:00