Chris Lattner 4ece577019 Enhance the shift propagator to handle the case when you have: ...

A = shl x, 42
...
B = lshr ..., 38

which can be transformed into:
A = shl x, 4
...

iff we can prove that the would-be-shifted-in bits
are already zero.  This eliminates two shifts in the testcase
and allows eliminate of the whole i128 chain in the real example.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112314 91177308-0d34-0410-b5e6-96231b3b80d8

2010-08-27 22:53:44 +00:00

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Analysis

When merging adjacent operands, scan ahead and merge all equal

2010-08-27 21:39:59 +00:00

Archive

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AsmParser

Add a comment explaining why this code doesn't just call

2010-08-24 14:35:45 +00:00

Bitcode

Add a FIXME comment.

2010-08-25 20:23:38 +00:00

CodeGen

Simplify.

2010-08-27 22:25:51 +00:00

CompilerDriver

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ExecutionEngine

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Linker

Reapply r112091 and r111922, support for metadata linking, with a

2010-08-26 15:41:53 +00:00

MC

MCELF: Port EmitInstruction changes from MachO streamer. Patch by Roman Divacky.

2010-08-27 10:40:51 +00:00

Support

StringRef::compare_numeric also differed from StringRef::compare for characters > 127.

2010-08-26 15:25:35 +00:00

System

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Target

Unsigned value cannot be < 0.

2010-08-27 21:44:35 +00:00

Transforms

Enhance the shift propagator to handle the case when you have:

2010-08-27 22:53:44 +00:00

VMCore

Add alignment arguments to all the NEON load/store intrinsics.

2010-08-27 17:13:24 +00:00

Makefile

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