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5 Commits

Author SHA1 Message Date
Dan Gohman
00c9f3e905 Mark dead physregdefs dead immediately. This helps MachineSink and 
MachineLICM and other things which run before LiveVariables is run.

llvm-svn: 85360
 2009-10-28 01:13:53 +00:00
Evan Cheng
eb82c3743a Turn on post-alloc scheduling for x86. 
llvm-svn: 84431
 2009-10-18 19:57:27 +00:00
Dan Gohman
3c46142f12 Add a CHECK line to check the position of the second divsd. 
llvm-svn: 83009
 2009-09-28 20:48:39 +00:00
Evan Cheng
ddc8678b00 Coalescer should not delete extract_subreg, insert_subreg, and subreg_to_reg of 
physical registers. This is especially critical for the later two since they
start the live interval of a super-register. e.g.
%DO<def> = INSERT_SUBREG %D0<undef>, %S0<kill>, 1
If this instruction is eliminated, the register scavenger will not be happy as
D0 is not defined previously.
This fixes PR5055.

llvm-svn: 82968
 2009-09-28 05:28:43 +00:00
Dan Gohman
487152872b Unbreak MachineLICM for instructions that reference RIP on x86-64 too. 
llvm-svn: 82825
 2009-09-25 23:58:45 +00:00