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| author | JF Bastien <jfb@google.com> | 2014-12-15 22:34:58 +0000 |
|---|---|---|
| committer | JF Bastien <jfb@google.com> | 2014-12-15 22:34:58 +0000 |
| commit | 388b8794c9cc83dcad29b34a751405eb4f5371d3 (patch) | |
| tree | 5ce800a9b481c3ee8f38a5aa27e1f2c4ad2eb748 /llvm/lib/Target/X86/X86VZeroUpper.cpp | |
| parent | 71e11a1d0d2c0419ff2edd1bea0c091441156f12 (diff) | |
| download | bcm5719-llvm-388b8794c9cc83dcad29b34a751405eb4f5371d3.tar.gz bcm5719-llvm-388b8794c9cc83dcad29b34a751405eb4f5371d3.zip | |
x86: Emit LOCK prefix after DATA16
Summary: x86 allows either ordering for the LOCK and DATA16 prefixes, but using GCC+GAS leads to different code generation than using LLVM. This change matches the order that GAS emits the x86 prefixes when a semicolon isn't used in inline assembly (see tc-i386.c comment before define LOCK_PREFIX), and helps simplify tooling that operates on the instruction's byte sequence (such as NaCl's validator). This change shouldn't have any performance impact.
Test Plan: ninja check
Reviewers: craig.topper, jvoung
Subscribers: jfb, llvm-commits
Differential Revision: http://reviews.llvm.org/D6630
llvm-svn: 224283
Diffstat (limited to 'llvm/lib/Target/X86/X86VZeroUpper.cpp')
0 files changed, 0 insertions, 0 deletions
