llvm/lib at 55474c1f67319809e27f3be6f94cc8dc77904868 - llvm

RPCS3/llvm

mirror of https://github.com/RPCS3/llvm.git synced 2025-01-19 00:14:20 +00:00

History

Ulrich Weigand 55474c1f67 [SystemZ] Avoid LER on z13 due to partial register dependencies

On the z13, it turns out to be more efficient to access a full
floating-point register than just the upper half (as done e.g.
by the LE and LER instructions).

Current code already takes this into account when loading from
memory by using the LDE instruction in place of LE.  However,
we still generate LER, which shows the same performance issues
as LE in certain circumstances.

This patch changes the back-end to emit LDR instead of LER to
implement FP32 register-to-register copies on z13.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263431 91177308-0d34-0410-b5e6-96231b3b80d8

2016-03-14 13:50:03 +00:00

Analysis

ConstantFoldInstruction: avoid wasted calls to ConstantFoldConstantExpression

2016-03-13 05:36:15 +00:00

AsmParser

Add a flag to the LLVMContext to disable name for Value other than GlobalValue

2016-03-10 01:28:54 +00:00

Bitcode

[Bitcode] Make writeComdats less strange

2016-03-13 08:01:03 +00:00

CodeGen

Recommitted r261633 "Supporting all entities declared in lexical scope in LLVM debug info."