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Commit Graph

Author	SHA1	Message	Date
Evan Cheng	e0c5313493	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

Author

SHA1

Message

Date

Evan Cheng

e0c5313493

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

1 Commits