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Author SHA1 Message Date
Eli Friedman 46995fa7e2 Add missing correctness check to ARMTargetLowering::ReconstructShuffle. Fixes PR11129. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142022 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-14 23:58:49 +00:00
Eli Friedman dae36ba802 Avoid undefined behavior in negation in LSR. Patch by Ahmed Charles. 
Someone more familiar with LSR should double-check that the extra cast is actually doing the right thing in the overflow cases; I'm not completely confident that's that case. 



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141916 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-13 23:48:33 +00:00
Eli Friedman ecb830e45c Fix undefined shift. Patch by Ahmed Charles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141914 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-13 23:36:06 +00:00
Eli Friedman d83a54fd35 Simplify assertion, and avoid undefined shift. Based on patch by Ahmed Charles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141912 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-13 23:27:48 +00:00
Eli Friedman 5bd7ff2128 Fix undefined shifts and abs in Alpha backend. Based on patch by Ahmed Charles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141909 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-13 23:13:35 +00:00
Eli Friedman 90406e18b8 Avoid undefined behavior in signed integer negation. Patch by Ahmed Charles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141905 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-13 22:49:56 +00:00
Eli Friedman 8e4d0429de Simplify and avoid undefined shift. Based on patch by Ahmed Charles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141903 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-13 22:40:23 +00:00
Eli Friedman b414142036 Enhance the memdep interface so that users can tell the difference between a dependency which cannot be calculated and a path reaching the entry point of the function. This patch introduces isNonFuncLocal, which replaces isUnknown in some cases. 
Patch by Xiaoyi Guo.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141896 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-13 22:14:57 +00:00
Eli Friedman a3a1635d04 Attempt to fix MSVC build. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141831 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-12 23:14:41 +00:00
Eli Friedman 5c75af6eb7 Use a utility from MathExtras to clarify a check and avoid undefined behavior. Based on patch by Ahmed Charles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141829 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-12 22:46:45 +00:00
Eli Friedman a046d2ff9a Use unsigned multiply to hash integers, so we don't end up with undefined behavior for large signed integers. Based on patch by Ahmed Charles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141827 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-12 22:25:45 +00:00
Eli Friedman 18ead6b587 Fix a couple hash functions so that they do not depend on undefined shifts. Based on patch by Ahmed Charles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141820 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-12 22:00:26 +00:00
Eli Friedman 90196fced2 Fix APFloat::getSmallestNormalized so the shift doesn't depend on undefined behavior. Patch from Ahmed Charles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141818 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-12 21:56:19 +00:00
Eli Friedman 7247a5f20e Fix APFloat::getLargest so that it actually returns the correct value. Found by accident while reviewing a patch to nearby code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141816 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-12 21:51:36 +00:00
Eli Friedman 830378f662 Remove extra semicolon. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141699 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-11 19:53:40 +00:00
Eli Friedman dca62d53b7 Make sure the X86 backend doesn't explode on 128-bit shuffles in AVX mode. Fixes PR11102. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141585 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-10 22:28:47 +00:00
Eli Friedman 9eb6b4d91b Fix APInt::operator*= so that it computes the correct result for large integers where there is unsigned overflow. Fix APFloat::toString so that it doesn't depend on the incorrect behavior in common cases (and computes the correct result in some rare cases). Fixes PR11086. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141441 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-07 23:40:49 +00:00
Eli Friedman 8540101252 Remove the old atomic instrinsics. autoupgrade functionality is included with this patch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141333 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-06 23:20:49 +00:00
Eli Friedman 792860883e PR11061: Make simplifylibcalls fold strcmp("", x) correctly. 
While I'm here, fix the related issue with strncmp, add some actual tests for strcmp and strncmp, and start using StringRef::compare for constant folding instead of using strcmp/strncmp so that the optimized IR isn't dependent on the host's implementation of strcmp.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141227 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-05 22:27:16 +00:00
Eli Friedman bb5a7442e3 Clean up uses of switch instructions so they are not dependent on the operand ordering. Patch by Stepan Dyatkovskiy. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140803 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-29 20:21:17 +00:00
Eli Friedman 7d3e2b78c7 PR11033: Make sure we don't generate PCMPGTQ and PCMPEQQ if the target CPU does not support them. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140723 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-28 21:00:25 +00:00
Eli Friedman f56dc281ce NULL cannot be portably used as the last argument to a function with __attribute((sentinel)), even though it usually works. Use (void*)0 instead. PR11002. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140720 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-28 20:41:50 +00:00
Eli Friedman e6fadced87 PR10628: Fix getModRefInfo so it queries the underlying alias() implementation correctly while checking nocapture calls. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140666 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-28 00:34:27 +00:00
Eli Friedman 139e6699c4 Last batch of test conversions to new atomic instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140585 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-27 00:17:29 +00:00
Eli Friedman 184944acdf Convert a bunch more tests over to the new atomic instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140582 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-26 23:15:09 +00:00
Eli Friedman 47d3ee559a Convert more tests to new atomic instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140567 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-26 21:36:10 +00:00
Eli Friedman de412c391b Convert more tests over to the new atomic instructions. 
I did not convert Atomics-32.ll and Atomics-64.ll by hand; the diff is autoupgrade output.

The wmb test is gone because there isn't any way to express wmb with the new atomic instructions; if someone really needs a non-asm way to write a wmb on Alpha, a platform-specific intrisic could be added.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140566 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-26 21:30:17 +00:00
Eli Friedman ad2d46d0a5 Convert more tests over to the new atomic instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140559 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-26 20:27:49 +00:00
Eli Friedman 236b71fc75 Upgrade a couple more tests to the new atomic instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140558 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-26 20:15:56 +00:00
Eli Friedman 46cb5afdcd Enhance alias analysis for atomic instructions a bit. Upgrade a couple alias-analysis tests to the new atomic instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140557 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-26 20:15:28 +00:00
Eli Friedman 28f7690e2d Fix this test so it doesn't fail on Mac. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140553 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-26 19:13:47 +00:00
Eli Friedman bde81d5be9 PR10998: It is not legal to sink an instruction past the terminator of a block; make sure we don't do that. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140428 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-23 22:41:57 +00:00
Eli Friedman 7666c7e4d2 PR10989: Don't print .hidden on Windows. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140356 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-23 00:13:02 +00:00
Eli Friedman a6176adc8a PR10991: make fast-isel correctly check whether accessing a global through an alias involves thread-local storage. (I'm not entirely sure how this is supposed to work, but this patch makes fast-isel consistent with the normal isel path.) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140355 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-22 23:41:28 +00:00
Eli Friedman d102a03b36 PR10987: add a missed safety check to isSafePHIToSpeculate in scalarrepl. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140327 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-22 18:56:30 +00:00
Eli Friedman 79782fc864 Make sure IPSCCP never marks a tracked call as overdefined in SCCPSolver::ResolvedUndefsIn. If we do, we can end up in a situation where a function is resolved to return a constant, but the caller is marked overdefined, which confuses the code later. 
<rdar://problem/9956541> (again).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140210 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-20 23:28:51 +00:00
Eli Friedman 17569fe05b Some additional tests for Thumb atomic load and store (which I somehow forgot to commit earlier). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140074 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-19 22:02:33 +00:00
Eli Friedman c6b8ba8673 Fix an infinite loop where a transform in InstCombiner::visitAnd claims a construct is changed when it is not. (See included testcase.) 
Patch by Xiaoyi Guo.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140072 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-19 21:58:15 +00:00
Eli Friedman c3d3598425 Fix a typo in the bitcode reader in the handling of atomic stores. Reported by David Meyer on llvmdev. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140040 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-19 19:41:28 +00:00
Eli Friedman ecc9b5ec23 Fix a minor bug in fs::create_directories. Patch by Albert Wong. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139928 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-16 18:36:31 +00:00
Eli Friedman 74bf18ccea Minor cleanup. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139869 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-15 22:26:18 +00:00
Eli Friedman 7cc156647f Use a more efficient lowering for Unordered/Monotonic atomic load/store on Thumb1. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139865 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-15 22:18:49 +00:00
Eli Friedman 331120b1a4 Some legalization fixes for atomic load and store. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139851 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-15 21:20:49 +00:00
Eli Friedman c82751dd67 Make demanded-elt simplification for shufflevector slightly stronger. Spotted by inspection. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139768 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-15 01:14:29 +00:00
Eli Friedman 322ea080ad Fix the code creating VZEXT_LOAD so that it creates the right memoperand. Issue spotted in -debug output. I can't think of any practical effects at the moment, but it might matter if we start doing more aggressive alias analysis in CodeGen. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139758 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-14 23:42:45 +00:00
Eli Friedman 596f447467 Fix check for unaligned load/store so it doesn't catch over-aligned load/store. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139649 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-13 22:19:59 +00:00
Eli Friedman fe731214d2 Error out on CodeGen of unaligned load/store. Fix test so it isn't accidentally testing that case. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139641 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-13 20:50:54 +00:00
Eli Friedman 885f1a0c04 Zap some junk from the ARM instruction descriptions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139575 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-13 02:29:58 +00:00
Eli Friedman 1582e7f1e2 Add comment to clarify the behavior of a helper in DSE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139571 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-13 01:28:59 +00:00
Eli Friedman 5ac7c7da3e Correct grammar. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139565 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-13 00:44:16 +00:00
Eli Friedman f73c881f4a Fix the assembler strings for a couple of atomic instructions. Doesn't really matter much in practice, but it's a bit cleaner. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139563 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-13 00:27:04 +00:00
Eli Friedman 2bc3d52b9a Change a bunch of isVolatile() checks to check for atomic load/store as well. 
No tests; these changes aren't really interesting in the sense that the logic is the same for volatile and atomic.

I believe this completes all of the changes necessary for the optimizer to handle loads and stores correctly.  I'm going to try and come up with some additional testing, though.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139533 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-12 20:23:13 +00:00
Eli Friedman 9f3b6a5a2a Fix mistake in test runline. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139505 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-12 17:32:58 +00:00
Eli Friedman cfeb55cdbc Really un-XFAIL the testcase, like I said I would in r139458. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139459 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-10 02:02:27 +00:00
Eli Friedman 106f6e7a27 r139454 activates an assert in a case where we were doing the right thing anyway. Make that explicit, and un-XFAIL the testcase. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139458 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-10 02:01:42 +00:00
Eli Friedman 9db817fd0c Make the SelectionDAG verify that all the operands of BUILD_VECTOR have the same type. Teach DAGCombiner::visitINSERT_VECTOR_ELT not to make invalid BUILD_VECTORs. Fixes PR10897. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139407 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-09 21:04:06 +00:00
Eli Friedman 64a17b309d Make sure to handle the case where emitPredicateMatch returns false. Noticed by inspection. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139317 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-08 21:00:31 +00:00
Eli Friedman 184166da61 A couple minor corrections to r139276. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139277 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-08 02:37:07 +00:00
Eli Friedman 81ac8ddc67 Fix the logic in BasicAliasAnalysis::aliasGEP for comparing GEP's with variable differences so that it actually does something sane. Fixes PR10881. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139276 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-08 02:23:31 +00:00
Eli Friedman d5ccb0558f Fix atomic load and store on x86 to pass -verify-machineinstrs (and possibly fix some subtle bugs involving passes which check mayStore()). 
This isn't exactly ideal, but it is good enough for the moment.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139245 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-07 18:48:32 +00:00
Eli Friedman 981a010c09 Relax the MemOperands on atomics a bit. Fixes -verify-machineinstrs failures for atomic laod/store on ARM. 
(The fix for the related failures on x86 is going to be nastier because we actually need Acquire memoperands attached to the atomic load instrs, etc.)



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139221 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-07 02:23:42 +00:00
Eli Friedman 34c4485b74 Add mayLoad/mayStore markings to ARM 64-bit atomic pseudo-instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139179 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-06 20:53:37 +00:00
Eli Friedman 4136d23c48 Don't fast-isel for atomic load/store; some cases require extra handling missing from fast-isel. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139044 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-02 22:33:24 +00:00
Eli Friedman 7df496d2ad Null-initialize to shut up -Wuninitialized warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138974 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-01 22:27:41 +00:00
Eli Friedman 770e16fe17 Fix test; sorry for any inconvenience. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138966 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-01 21:25:42 +00:00
Eli Friedman 86b5db8c01 Fix an issue with the IR sink pass found by inspection. (I'm not sure anyone is actually using this, but might as well fix it since I found the issue.) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138965 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-01 21:21:24 +00:00
Eli Friedman 89e0f4b5b0 Add missing newline. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138964 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-01 21:20:11 +00:00
Eli Friedman 81b4e434d9 Make isSafeToSpeculativelyExecute() return the right answer for some new instructions. Found by inspection; not sure what practical impact, if any, this has. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138962 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-01 21:03:03 +00:00
Eli Friedman 1b73866505 Disable this test until Bill fixes it properly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138914 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 23:03:30 +00:00
Eli Friedman 24adac8b79 Add tests for the transformations SCCP can do on atomic loads and stores (which are safe without any modifications). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138902 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 21:37:06 +00:00
Eli Friedman fcd75e5efb Misc cleanup; addresses Duncan's comments on r138877. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138887 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 20:13:26 +00:00
Eli Friedman 62bb16cfd1 Fill in type legalization for MERGE_VALUES in all the various cases. Patch by Micah Villmow. (No testcase because the issue only showed up in an out-of-tree backend.) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138877 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 18:36:04 +00:00
Eli Friedman ba567d670d Generic expansion for atomic load/store into cmpxchg/atomicrmw xchg; implements 64-bit atomic load/store for ARM. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138872 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 18:26:09 +00:00
Eli Friedman 4d3f329453 64-bit atomic cmpxchg for ARM. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138868 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 17:52:22 +00:00
Eli Friedman ac86d43eae Make sure we don't crash when -miphoneos-version-min is specified on x86. Hopefully this will fix gcc testsuite failures. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138856 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 16:19:51 +00:00
Eli Friedman 3d93861c23 Some minor cleanups for r138845. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138846 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 00:41:05 +00:00
Eli Friedman 2bdffe4882 Some 64-bit atomic operations on ARM. 64-bit cmpxchg coming next. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138845 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-31 00:31:29 +00:00
Eli Friedman f3704769bb Explicitly zero out parts of a vector which are required to be zero by the algorithm in LowerUINT_TO_FP_i32. This only has a substantial effect on the generated code when the input is extracted from a vector register; other ways of loading an i32 do the appropriate zeroing implicitly. Fixes PR10802. 
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 2011-08-29 21:15:46 +00:00
Eli Friedman 4db5acaf48 Expand ATOMIC_LOAD and ATOMIC_STORE for architectures I don't know well enough to fix properly. 
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 2011-08-29 18:23:02 +00:00
Eli Friedman 43f51aeca8 Add support for generating CMPXCHG16B on x86-64 for the cmpxchg IR instruction. 
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 2011-08-26 21:21:21 +00:00
Eli Friedman 069e2ed794 Atomic load/store on ARM/Thumb. 
I don't really like the patterns, but I'm having trouble coming up with a
better way to handle them.

I plan on making other targets use the same legalization
ARM-without-memory-barriers is using... it's not especially efficient, but
if anyone cares, it's not that hard to fix for a given target if there's
some better lowering.



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 2011-08-26 02:59:24 +00:00
Eli Friedman 4ba10867bd Remove empty directories. 
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 2011-08-25 01:33:48 +00:00
Eli Friedman f8f90f0174 Hook up 64-bit atomic load/store on x86-32. I plan to write more efficient implementations eventually. 
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 2011-08-24 22:33:28 +00:00
Eli Friedman 4317fe1fc6 Fix whitespace. 
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 2011-08-24 21:17:30 +00:00
Eli Friedman bbc87a3a9a Basic tests for atomic load and store on x86. 
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 2011-08-24 21:16:59 +00:00
Eli Friedman 327236cd6c Basic x86 code generation for atomic load and store instructions. 
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 2011-08-24 20:50:09 +00:00
Eli Friedman c264b2f693 Some minor updates to atomic acquire/release docs in LangRef. 
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 2011-08-24 20:28:39 +00:00
Eli Friedman 234bccd194 Some minor wording updates and cross-linking for atomic docs. Explicitly note that we don't try to portably define what volatile in LLVM IR means. 
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 2011-08-22 21:35:27 +00:00
Eli Friedman 56efe24431 Atomic load/store handling for the passes using memdep (GVN, DSE, memcpyopt). 
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 2011-08-17 22:22:24 +00:00
Eli Friedman f23d4adbfa Revert r137781; I agree with Duncan's comment that the situation in question is clearly impossible given the current structure of the code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137853 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-17 19:31:49 +00:00
Eli Friedman 447f95202a Silly mistake from r137777; restore significant isStructTy() checks. While here, be a bit more defensive 
with unknown instructions.

Fixes PR10687.



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 2011-08-17 18:10:43 +00:00
Eli Friedman bfd5040ddc An additional atomic test; related to r137662. 
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 2011-08-16 23:29:17 +00:00
Eli Friedman 207634263c Extend the undef ^ undef idiom once more. No testcase: I can't figure out how to actually trigger the codepath in question at the moment, but it might get exposed in the future. 
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 2011-08-16 22:38:34 +00:00
Eli Friedman 054ddf799b A bunch of misc fixes to SCCPSolver::ResolvedUndefsIn, including a fix to stop 
making random bad assumptions about instructions which are not explicitly listed.  

Includes fix for rdar://9956541, a version of "undef ^ undef should return
0 because it's easier than arguing with users".



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 2011-08-16 22:06:31 +00:00
Eli Friedman 1fc291f0d3 Minor bug in SCCP found by inspection. (I don't think it's possible to hit this with a normal pass pipeline, but fixing for completeness.) 
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 2011-08-16 21:12:35 +00:00
Eli Friedman 34fd67c7bc Fix test. 
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 2011-08-16 01:42:56 +00:00
Eli Friedman 2199dfb0e6 Revert a bit of r137667; the logic in question can safely handle atomic load/store. 
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 2011-08-16 01:28:22 +00:00
Eli Friedman 6437f2c2e2 After talking with Bill, it seems like the LandingPad handling here is likely 
to be wrong (or at least somewhat suspect).  Leave a FIXME for Bill.




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 2011-08-16 00:41:37 +00:00
Eli Friedman 33cb445fb6 Minor comment fixes. 
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 2011-08-16 00:20:11 +00:00
Eli Friedman 8176388d65 Update SimplifyCFG for atomic operations. 
This commit includes a mention of the landingpad instruction, but it's not
changing the behavior around it.  I think the current behavior is correct,
though.  Bill, can you double-check that?



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 2011-08-15 23:59:28 +00:00