David Majnemer 5886331bc4 [InstCombine] Don't aggressively replace xor with icmp ...

For some cases, InstCombine replaces the sequence of xor/sub instruction
followed by cmp instruction into a single cmp instruction.

However, this replacement may result suboptimal result especially when
the xor/sub has more than one use, as discussed in
bug 26465 (https://llvm.org/bugs/show_bug.cgi?id=26465).

This patch make the replacement happen only when xor/sub has only one
use.

Differential Revision: http://reviews.llvm.org/D16915

Patch by Taewook Oh!

llvm-svn: 260695

2016-02-12 18:12:38 +00:00

..

Analysis

AMDGPU: Fix not handling new workitem intrinsics in DivergenceAnalysis

2016-02-11 05:32:51 +00:00

Assembler

Fix constant folding of constant vector GEPs with undef or null as pointer argument.

2016-01-19 16:34:31 +00:00

Bindings

Add support for phi nodes in the LLVM C API test

2016-02-11 21:37:54 +00:00

Bitcode

Restore "[ThinLTO] Use MD5 hash in function index." with fix

2016-02-10 21:55:02 +00:00

BugPoint

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CodeGen

[AMDGPU] Assembler: Swap operands of flat_store instructions to match AMD assembler

2016-02-12 17:57:54 +00:00

DebugInfo

[codeview] Dump def range lengths in hex

2016-02-11 23:40:14 +00:00

Examples

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ExecutionEngine

Disable the new Orc lazy JIT tests on Windows, they do not pass

2016-02-10 18:46:42 +00:00

Feature

[GMR/OperandBundles] Teach getModRefBehavior about operand bundles

2016-02-09 02:31:47 +00:00

FileCheck

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Instrumentation

[msan] Put msan constructor in a comdat.

2016-02-12 00:37:52 +00:00

Integer

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JitListener

Fix several accidental DOS line endings in source files

2016-01-03 17:22:03 +00:00

LibDriver

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Linker

[ThinLTO] Remove imported available externally defs from comdats.

2016-02-08 18:47:20 +00:00

LTO

[LTO] Restore original linkage of externals prior to splitting

2016-01-18 23:24:54 +00:00

MC

[AMDGPU] Assembler: Swap operands of flat_store instructions to match AMD assembler

2016-02-12 17:57:54 +00:00

Object

[readobj] Dump DT_JMPREL relocations when outputting dynamic relocations.

2016-02-11 04:59:53 +00:00

Other

Recommit r256952 "Filtering IR printing for print-after-all/print-before-all"

2016-01-06 22:55:03 +00:00

SymbolRewriter

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TableGen

SelectionDAG: Make Properties a field of SDPatternOperator

2016-02-10 18:40:04 +00:00

tools

[sancov] improved object files handling.

2016-02-12 00:29:07 +00:00

Transforms

[InstCombine] Don't aggressively replace xor with icmp

2016-02-12 18:12:38 +00:00

Unit

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Verifier

Add a "gc-transition" operand bundle

2016-01-20 19:50:25 +00:00

YAMLParser

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.clang-format

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CMakeLists.txt

Introduce sanstats tool and llvm::CreateSanitizerStatReport function.

2016-01-16 00:31:11 +00:00

lit.cfg

Introduce sanstats tool and llvm::CreateSanitizerStatReport function.

2016-01-16 00:31:11 +00:00

lit.site.cfg.in

Make WinCOFFObjectWriter.cpp's timestamp writing not use ENABLE_TIMESTAMPS

2016-01-06 19:05:19 +00:00

TestRunner.sh

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