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| author | Zvi Rackover <zvi.rackover@intel.com> | 2016-09-26 06:42:07 +0000 |
|---|---|---|
| committer | Zvi Rackover <zvi.rackover@intel.com> | 2016-09-26 06:42:07 +0000 |
| commit | 839d15a194a658dfe407e1681514231455138360 (patch) | |
| tree | 554c7066bdf9216a5962edd93e21927bf4d9705c /llvm/lib/CodeGen/DFAPacketizer.cpp | |
| parent | 9d68b64c00e43a5b5430c5cdbd78f4ae85aab0b4 (diff) | |
| download | bcm5719-llvm-839d15a194a658dfe407e1681514231455138360.tar.gz bcm5719-llvm-839d15a194a658dfe407e1681514231455138360.zip | |
[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
Diffstat (limited to 'llvm/lib/CodeGen/DFAPacketizer.cpp')
0 files changed, 0 insertions, 0 deletions
