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Commit Graph

Author	SHA1	Message	Date
Jim Grosbach	4a2f107b04	ARM VLDR/VSTR instructions don't need a size suffix. Canonicallize on the non-suffixed form, but continue to accept assembly that has any correctly sized type suffix. llvm-svn: 144583	2011-11-14 23:03:21 +00:00
Jakob Stoklund Olesen	2611cc2520	Fix -widen-vmovs liveness issues. When widening a copy, we are reading a larger register that may not be live. Use an <undef> flag to tell the register scavenger and machine code verifier that we know the value isn't defined. We now widen: %S6<def> = COPY %S4<kill>, %D3<imp-def> into: %D3<def> = VMOVD %D2<undef>, pred:14, pred:%noreg, %S4<imp-use,kill> This also keeps the <kill> flag on %S4 so we don't inadvertently kill a live value in %S5. Finally, ensure that ARMBaseInstrInfo::setExecutionDomain() preserves the <undef> flag when converting VMOVD to VORR. llvm-svn: 141746	2011-10-12 00:06:23 +00:00

Author

SHA1

Message

Date

Jim Grosbach

4a2f107b04

ARM VLDR/VSTR instructions don't need a size suffix.

Canonicallize on the non-suffixed form, but continue to accept assembly that
has any correctly sized type suffix.

llvm-svn: 144583

2011-11-14 23:03:21 +00:00

Jakob Stoklund Olesen

2611cc2520

Fix -widen-vmovs liveness issues.

When widening a copy, we are reading a larger register that may not be
live.  Use an <undef> flag to tell the register scavenger and machine
code verifier that we know the value isn't defined.

We now widen:

  %S6<def> = COPY %S4<kill>, %D3<imp-def>

into:

  %D3<def> = VMOVD %D2<undef>, pred:14, pred:%noreg, %S4<imp-use,kill>

This also keeps the <kill> flag on %S4 so we don't inadvertently kill a
live value in %S5.

Finally, ensure that ARMBaseInstrInfo::setExecutionDomain() preserves
the <undef> flag when converting VMOVD to VORR.

llvm-svn: 141746

2011-10-12 00:06:23 +00:00

2 Commits