Sanjay Patel a3209ae52e [DAGCombiner] fold assertzexts separated by trunc ...

If we have an AssertZext of a truncated value that has already been AssertZext'ed, 
we can assert on the wider source op to improve the zext-y knowledge:
 assert (trunc (assert X, i8) to iN), i1 --> trunc (assert X, i1) to iN

This moves a fold from being Mips-specific to general combining, and x86 shows
improvements.

Differential Revision: https://reviews.llvm.org/D37017



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@313577 91177308-0d34-0410-b5e6-96231b3b80d8

2017-09-18 22:05:35 +00:00

..

Analysis

[TargetTransformInfo] Static alloca has 0 cost

2017-09-15 22:28:12 +00:00

Assembler

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Bindings

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Bitcode

[AutoUpgrade] Fix a compatibility issue with module flag

2017-09-15 21:12:14 +00:00

BugPoint

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CodeGen

[DAGCombiner] fold assertzexts separated by trunc

2017-09-18 22:05:35 +00:00

DebugInfo

[dwarfdump] Make .eh_frame an alias for .debug_frame

2017-09-18 14:15:57 +00:00

DllTool

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Examples

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ExecutionEngine

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Feature

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FileCheck

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Instrumentation

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Integer

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JitListener

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LibDriver

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Linker

llvm-dwarfdump: Make -brief the default and add a -verbose option instead.

2017-09-11 23:05:20 +00:00

LTO

Reland r313157, "ThinLTO: Correctly follow aliasee references when dead stripping." which was reverted in r313222.

2017-09-14 05:02:59 +00:00

MC

[AArch64] Add V8_2aOps feature to Cortex-A55 and 75

2017-09-18 14:46:14 +00:00

Object

[MachO] Prevent heap overflow when load command extends past EOF

2017-09-13 13:43:01 +00:00

ObjectYAML

[WebAssembly] Update relocation names to match spec

2017-09-01 17:32:01 +00:00

Other

[PM/CGSCC] Teach the CGSCC pass manager components to gracefully handle

2017-09-14 08:33:57 +00:00

SafepointIRVerifier

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SymbolRewriter

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TableGen

TableGen support for parameterized register class information

2017-09-14 16:56:21 +00:00

ThinLTO/X86

ModuleSummaryAnalysis: Correctly handle all function operand references.

2017-09-07 05:35:35 +00:00

tools

llvm-dwarfdump: add a --show-parents options when selectively dumping DIEs.

2017-09-18 21:27:44 +00:00

Transforms

[InstCombine] auto-generate complete checks; NFC

2017-09-18 21:57:56 +00:00

Unit

Resubmit "[lit] Force site configs to run before source-tree configs"

2017-09-15 22:10:46 +00:00

Verifier

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YAMLParser

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.clang-format

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CMakeLists.txt

Add llvm-isel-fuzzer to test/CMakeLists.txt

2017-09-03 03:00:27 +00:00

lit.cfg

Resubmit "Add a shared llvm.lit module that all test suites can use."

2017-09-16 18:46:21 +00:00

lit.site.cfg.in

Resubmit "Add a shared llvm.lit module that all test suites can use."

2017-09-16 18:46:21 +00:00

TestRunner.sh

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