llvm-project

Commit Graph

Author	SHA1	Message	Date
Matthias Braun	6b898beb8e	X86: Do not use llc -march in tests. `llc -march` is problematic because it only switches the target architecture, but leaves the operating system unchanged. This occasionally leads to indeterministic tests because the OS from LLVM_DEFAULT_TARGET_TRIPLE is used. However we can simply always use `llc -mtriple` instead. This changes all the tests to do this to avoid people using -march when they copy and paste parts of tests. See also the discussion in https://reviews.llvm.org/D35287 llvm-svn: 309774	2017-08-02 00:28:10 +00:00
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
Andrey Turetskiy	b405606432	[X86] PR27502: Fix the LEA optimization pass. Handle MachineBasicBlock as a memory displacement operand in the LEA optimization pass. Differential Revision: http://reviews.llvm.org/D19409 llvm-svn: 267551	2016-04-26 12:18:12 +00:00

Author

SHA1

Message

Date

Matthias Braun

6b898beb8e

X86: Do not use llc -march in tests.

`llc -march` is problematic because it only switches the target
architecture, but leaves the operating system unchanged. This
occasionally leads to indeterministic tests because the OS from
LLVM_DEFAULT_TARGET_TRIPLE is used.

However we can simply always use `llc -mtriple` instead. This changes
all the tests to do this to avoid people using -march when they copy and
paste parts of tests.

See also the discussion in https://reviews.llvm.org/D35287

llvm-svn: 309774

2017-08-02 00:28:10 +00:00

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

Andrey Turetskiy

b405606432

[X86] PR27502: Fix the LEA optimization pass.

Handle MachineBasicBlock as a memory displacement operand in the LEA optimization pass.

Differential Revision: http://reviews.llvm.org/D19409

llvm-svn: 267551

2016-04-26 12:18:12 +00:00

3 Commits