llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-21 21:29:41 +00:00

History

Alexey Volkov 0d0bab5168 [X86] Tune LEA usage for Silvermont

According to Intel Software Optimization Manual on Silvermont in some cases LEA
is better to be replaced with ADD instructions:
"The rule of thumb for ADDs and LEAs is that it is justified to use LEA
with a valid index and/or displacement for non-destructive destination purposes
(especially useful for stack offset cases), or to use a SCALE.
Otherwise, ADD(s) are preferable."

Differential Revision: http://reviews.llvm.org/D3826


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209198 91177308-0d34-0410-b5e6-96231b3b80d8

2014-05-20 08:55:50 +00:00

Analysis

Teach isKnownNonNull that a nonnull return is not null. Add a test for this case as well as the case of a nonnull attribute (already handled but not tested).

2014-05-20 05:13:21 +00:00

AsmParser

Add 'nonnull', a new parameter and return attribute which indicates that the pointer is not null. Instcombine will elide comparisons between these and null. Patch by Luqman Aden!

2014-05-20 01:23:40 +00:00

Bitcode

Add 'nonnull', a new parameter and return attribute which indicates that the pointer is not null. Instcombine will elide comparisons between these and null. Patch by Luqman Aden!

2014-05-20 01:23:40 +00:00

CodeGen

DebugInfo: Emit function definitions within their namespace scope.