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4015c5e2e4
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Jingyue Wu 4015c5e2e4 [NaryReassociate] enhances nsw by leveraging @llvm.assume 
Summary:
nsw are flaky and can often be removed by optimizations. This patch enhances
nsw by leveraging @llvm.assume in the IR. Specifically, NaryReassociate now
understands that

    assume(a + b >= 0) && assume(a >= 0) ==> a +nsw b

As a result, it can split more sext(a + b) into sext(a) + sext(b) for CSE.

Test Plan: nary-gep.ll

Reviewers: broune, meheff

Subscribers: jholewinski, llvm-commits

Differential Revision: http://reviews.llvm.org/D10822

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241139 91177308-0d34-0410-b5e6-96231b3b80d8
2015-07-01 03:38:49 +00:00
..
Analysis [LAA] Try to prove non-wrapping of pointers if SCEV cannot 2015-06-26 17:25:43 +00:00
Assembler Add a DIModule metadata node to the IR. 2015-06-29 23:03:47 +00:00
Bindings test: Move target dependent test in their own folder for c API test 2015-06-23 06:46:54 +00:00
Bitcode Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
BugPoint
CodeGen [SEH] Add new intrinsics for recovering and restoring parent frames 2015-06-30 22:46:59 +00:00
DebugInfo Debug info: Add dwarf backend support for DIModule. 2015-06-30 02:13:04 +00:00
ExecutionEngine Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
Feature Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
FileCheck
Instrumentation [SanitizerCoverage] Don't add instrumentation to unreachable blocks. 2015-06-30 23:11:45 +00:00
Integer
JitListener
LibDriver Use correct escaping for semicolon on Windows. 2015-06-20 01:28:20 +00:00
Linker Linker: Do not expect comdat to exist in source module. 2015-06-22 21:46:51 +00:00
LTO Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
MC [mips] [IAS] Add support for the .module softfloat/hardfloat directives. 2015-06-30 13:46:03 +00:00
Object Remove Elf_Shdr_Iter. Diagnose files with invalid section header sizes. 2015-06-30 19:58:10 +00:00
Other Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
SymbolRewriter
TableGen
tools Pass -m to the linker in this test. 2015-06-23 18:04:54 +00:00
Transforms [NaryReassociate] enhances nsw by leveraging @llvm.assume 2015-07-01 03:38:49 +00:00
Unit
Verifier Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
YAMLParser
.clang-format
CMakeLists.txt LibDriver, llvm-lib: introduce. 2015-06-09 21:50:22 +00:00
lit.cfg LibDriver, llvm-lib: introduce. 2015-06-09 21:50:22 +00:00
lit.site.cfg.in
Makefile
Makefile.tests
TestRunner.sh