llvm-project

Commit Graph

Author	SHA1	Message	Date
Zvi Rackover	839d15a194	[X86] Optimization for replacing LEA with MOV at frame index elimination time Summary: Replace a LEA instruction of the form 'lea (%esp), %ebx' --> 'mov %esp, %ebx' MOV is preferable over LEA because usually there are more issue-slots available to execute MOVs than LEAs. Latest processors also support zero-latency MOVs. Fixes pr29022. Reviewers: hfinkel, delena, igorb, myatsina, mkuper Differential Revision: https://reviews.llvm.org/D24705 llvm-svn: 282385	2016-09-26 06:42:07 +00:00
Zia Ansari	30a02384f7	Implemented stack symbol table ordering/packing optimization to improve data locality and code size from SP/FP offset encoding. Differential Revision: http://reviews.llvm.org/D15393 llvm-svn: 260917	2016-02-15 23:44:13 +00:00

Author

SHA1

Message

Date

Zvi Rackover

839d15a194

[X86] Optimization for replacing LEA with MOV at frame index elimination time

Summary:
Replace a LEA instruction of the form 'lea (%esp), %ebx' --> 'mov %esp, %ebx'

MOV is preferable over LEA because usually there are more issue-slots available to execute MOVs than LEAs. Latest processors also support zero-latency MOVs.

Fixes pr29022.

Reviewers: hfinkel, delena, igorb, myatsina, mkuper

Differential Revision: https://reviews.llvm.org/D24705

llvm-svn: 282385

2016-09-26 06:42:07 +00:00

Zia Ansari

30a02384f7

Implemented stack symbol table ordering/packing optimization to improve data locality and code size from SP/FP offset encoding.

Differential Revision: http://reviews.llvm.org/D15393

llvm-svn: 260917

2016-02-15 23:44:13 +00:00

2 Commits