Evan Cheng 7da9ecf967 Add a quick pass to optimize sign / zero extension instructions. For targets where the pre-extension values are available in the subreg of the result of the extension, replace the uses of the pre-extension value with the result + extract_subreg. ... For now, this pass is fairly conservative. It only perform the replacement when both the pre- and post- extension values are used in the block. It will miss cases where the post-extension values are live, but not used. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93278 91177308-0d34-0410-b5e6-96231b3b80d8		2010-01-13 00:30:23 +00:00
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Alpha	Delete useless trailing semicolons.	2010-01-05 17:55:26 +00:00
ARM	Delete useless trailing semicolons.	2010-01-05 17:55:26 +00:00
Blackfin	Teach dag combine to fold the following transformation more aggressively:	2010-01-06 19:38:29 +00:00
CBackend
CellSPU	Teach dag combine to fold the following transformation more aggressively:	2010-01-06 19:38:29 +00:00
CPP
Generic	APInt'fy TargetLowering::SimplifySetCC to fix PR5963.	2010-01-07 20:58:44 +00:00
Mips	Delete useless trailing semicolons.	2010-01-05 17:55:26 +00:00
MSP430	Delete useless trailing semicolons.	2010-01-05 17:55:26 +00:00
PIC16	Extern declaration for unordered.f32 libcall was not being emitted. Fixed that.	2009-12-29 03:24:34 +00:00
PowerPC	Delete useless trailing semicolons.	2010-01-05 17:55:26 +00:00
SPARC	Delete useless trailing semicolons.	2010-01-05 17:55:26 +00:00
SystemZ	Teach dag combine to fold the following transformation more aggressively:	2010-01-06 19:38:29 +00:00
Thumb	Add test case for the phi reuse patch.	2009-12-18 00:11:44 +00:00
Thumb2	Add comments.	2010-01-07 00:51:04 +00:00
X86	Add a quick pass to optimize sign / zero extension instructions. For targets where the pre-extension values are available in the subreg of the result of the extension, replace the uses of the pre-extension value with the result + extract_subreg.	2010-01-13 00:30:23 +00:00
XCore	Delete useless trailing semicolons.	2010-01-05 17:55:26 +00:00