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Sanjoy Das 2d38031271 Revert some changes that were made to fix PR20680. 
This re-lands change r230921.  r230921 was reverted because it broke a
clang test; a checkin fixing the clang test will be commited shortly.

Summary:
As far as I can tell, the real bug causing the issue was fixed in
r230533.  SCEVExpander should mark an increment operation as nuw or nsw
only if it can *prove* that the operation does not overflow.  There
shouldn't be any situation where we have to do something different
because of no-wrap flags generated by SCEVExpander.

Revert "IndVarSimplify: Allow LFTR to fire more often"

This reverts commit 1ade0f0faa98877b688e0b9da58e876052c1e04e (SVN: 222213).

Revert "IndVarSimplify: Don't let LFTR compare against a poison value"

This reverts commit c0f2b8b528d8a37b0a1522aae90af649d6357eb5 (SVN: 217102).

Reviewers: majnemer, atrick, spatel

Differential Revision: http://reviews.llvm.org/D7979

llvm-svn: 231018
 		2015-03-02 21:41:07 +00:00
..
Analysis [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
Assembler Teach DataLayout that alignments on basic types must be powers of two. 2015-03-02 09:35:03 +00:00
Bindings [OCaml] Add Llvm.build_empty_phi. 2015-02-06 13:42:03 +00:00
Bitcode [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
BugPoint [opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction 2015-02-27 19:29:02 +00:00
CodeGen Revert "Refactor DebugLocDWARFExpression so it doesn't require access to the" 2015-03-02 20:01:54 +00:00
DebugInfo Revert r230979, should apply to all X86 ELF. 2015-03-02 18:50:18 +00:00
ExecutionEngine [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
Feature [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
FileCheck FileCheck: Add CHECK-SAME 2015-02-26 04:53:00 +00:00
Instrumentation [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
Integer [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
JitListener [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
LTO [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
Linker lit: Add 'cd' support to the internal shell and port some tests 2015-03-02 21:33:18 +00:00
MC AVX-512: Add assembly parser support for Rounding mode 2015-03-02 15:00:34 +00:00
Object lit: Add 'cd' support to the internal shell and port some tests 2015-03-02 21:33:18 +00:00
Other [opaque pointer type] Add textual IR support for explicit type parameter to load instruction 2015-02-27 21:17:42 +00:00
SymbolRewriter SymbolRewriter: allow rewriting with comdats 2015-01-27 22:57:39 +00:00
TableGen
…
Transforms Revert some changes that were made to fix PR20680. 2015-03-02 21:41:07 +00:00
Unit
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Verifier Teach the verifier to enforce that the alignment argument of memory intrinsics must be a power of 2. 2015-03-02 09:35:06 +00:00
YAMLParser
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tools lit: Add 'cd' support to the internal shell and port some tests 2015-03-02 21:33:18 +00:00
.clang-format
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CMakeLists.txt Back out two accidental changes that snuck in with r229245. Sorry these 2015-02-14 09:05:58 +00:00
Makefile Attempt to fix the builders. 2015-02-22 07:01:41 +00:00
Makefile.tests
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TestRunner.sh
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lit.cfg Change SystemZ large tests to use the existing long_tests property 2015-03-02 19:34:11 +00:00
lit.site.cfg.in Remove log statements from config scripts. 2015-02-22 07:31:42 +00:00