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3 Commits

Author SHA1 Message Date
Puyan Lotfi
d4c615be8c Followup on Proposal to move MIR physical register namespace to '$' sigil. 
Discussed here:

http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html

In preparation for adding support for named vregs we are changing the sigil for
physical registers in MIR to '$' from '%'. This will prevent name clashes of
named physical register with named vregs.

llvm-svn: 323922
 2018-01-31 22:04:26 +00:00
Krzysztof Parzyszek
0a6ba29aad [IfConversion] More simple, correct dead/kill liveness handling 
Patch by Jesper Antonsson.

Differential Revision: https://reviews.llvm.org/D37611

llvm-svn: 313268
 2017-09-14 15:53:11 +00:00
Krzysztof Parzyszek
738486a316 IfConversion: Add implicit uses for redefined regs with live subregisters 
Normally, if conversion would add implicit uses for redefined registers,
e.g. R0<def> = add_if ..., R0<imp-use>. However, if only subregisters of
R0 are known to be live but not R0 itself, such implicit uses will not be
added, causing prior definitions of such subregisters and R0 itself to
become dead.

llvm-svn: 282626
 2016-09-28 20:07:41 +00:00