Sanjoy Das 8d16a81c33 Bugfix: SCEVExpander incorrectly marks increment operations as no-wrap ... When emitting the increment operation, SCEVExpander marks the operation as nuw or nsw based on the flags on the preincrement SCEV. This is incorrect because, for instance, it is possible that {-6,+,1} is <nuw> while {-6,+,1}+1 = {-5,+,1} is not. This change teaches SCEV to mark the increment as nuw/nsw only if it can explicitly prove that the increment operation won't overflow. Apart from the attached test case, another (more realistic) manifestation of the bug can be seen in Transforms/IndVarSimplify/pr20680.ll. NOTE: this change was landed with an incorrect commit message in rL230275 and was reverted for that reason in rL230279. This commit message is the correct one. Differential Revision: http://reviews.llvm.org/D7778 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230280 91177308-0d34-0410-b5e6-96231b3b80d8		2015-02-23 23:22:58 +00:00
..
Analysis	Bugfix: SCEVExpander incorrectly marks increment operations as no-wrap	2015-02-23 23:22:58 +00:00
Assembler	AsmParser: Check ConstantExpr insertvalue operands for type correctness	2015-02-23 07:13:52 +00:00
Bindings	[OCaml] Add Llvm.build_empty_phi.	2015-02-06 13:42:03 +00:00
Bitcode	Use common parse routine to read alignment values from bitcode	2015-02-22 19:32:03 +00:00
BugPoint	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
CodeGen	Bugfix: SCEVExpander incorrectly marks increment operations as no-wrap	2015-02-23 23:22:58 +00:00
DebugInfo	[llvm-pdbdump] Add an option to dump full class definitions.	2015-02-23 05:58:34 +00:00
ExecutionEngine	Make frem.ll flush after calling printf.	2015-02-18 19:32:28 +00:00
Feature	Don't promote asynch EH invokes of nounwind functions to calls	2015-02-11 01:23:16 +00:00
FileCheck
Instrumentation	[sanitizer] fix a test broken by r229940	2015-02-20 02:12:25 +00:00
Integer
JitListener	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
Linker	Add run line that was missing in r228999.	2015-02-13 16:00:03 +00:00
LTO	Introduce Target::createNullTargetStreamer and use it from IRObjectFile.	2015-02-19 00:45:02 +00:00
MC	[AsmPrinter] Access pointers to globals via pcrel GOT entries	2015-02-23 21:26:18 +00:00
Object	[obj2yaml/yaml2obj] Add SHT_GROUP support.	2015-02-21 04:28:26 +00:00
Other	Don't promote asynch EH invokes of nounwind functions to calls	2015-02-11 01:23:16 +00:00
SymbolRewriter	SymbolRewriter: allow rewriting with comdats	2015-01-27 22:57:39 +00:00
TableGen
tools	InstrProf: Teach llvm-cov to show the max count instead of the last	2015-02-23 21:21:34 +00:00
Transforms	Bugfix: SCEVExpander incorrectly marks increment operations as no-wrap	2015-02-23 23:22:58 +00:00
Unit
Verifier	Verifier: Unused comdats might not have a corresponding GV	2015-02-20 19:58:48 +00:00
YAMLParser
.clang-format
CMakeLists.txt	Back out two accidental changes that snuck in with r229245. Sorry these	2015-02-14 09:05:58 +00:00
lit.cfg	[gold] Consolidate the gold plugin options and actually search for	2015-02-14 09:43:57 +00:00
lit.site.cfg.in	Remove log statements from config scripts.	2015-02-22 07:31:42 +00:00
Makefile	Attempt to fix the builders.	2015-02-22 07:01:41 +00:00
Makefile.tests
TestRunner.sh