llvm-project

Commit Graph

Author	SHA1	Message	Date
Preston Gurd	48ccc4df0b	This patch adds X86 instruction itineraries for non-pseudo opcodes in X86InstrCompiler.td. It also adds –mcpu-generic to the legalize-shift-64.ll test so the test will pass if run on an Intel Atom CPU, which would otherwise produce an instruction schedule which differs from that which the test expects. llvm-svn: 153033	2012-03-19 14:10:12 +00:00
Benjamin Kramer	d05a0c6c42	LegalizeIntegerTypes: Reorder operations in the "big shift by small amount" optimization, making the lives of later passes easier. llvm-svn: 151722	2012-02-29 13:27:00 +00:00
Benjamin Kramer	0c281a7deb	LegalizeIntegerTypes: Reenable the large shift with small amount optimization. To avoid problems with zero shifts when getting the bits that move between words we use a trick: first shift the by amount-1, then do another shift by one. When amount is 0 (and size 32) we first shift by 31, then by one, instead of by 32. Also fix a latent bug that emitted the low and high words in the wrong order when shifting right. Fixes PR12113. llvm-svn: 151637	2012-02-28 17:58:00 +00:00

Author

SHA1

Message

Date

Preston Gurd

48ccc4df0b

This patch adds X86 instruction itineraries for non-pseudo opcodes in

X86InstrCompiler.td.
 
It also adds –mcpu-generic to the legalize-shift-64.ll test so the test
will pass if run on an Intel Atom CPU, which would otherwise
produce an instruction schedule which differs from that which the test expects.

llvm-svn: 153033

2012-03-19 14:10:12 +00:00

Benjamin Kramer

d05a0c6c42

LegalizeIntegerTypes: Reorder operations in the "big shift by small amount" optimization, making the lives of later passes easier.

llvm-svn: 151722

2012-02-29 13:27:00 +00:00

Benjamin Kramer

0c281a7deb

LegalizeIntegerTypes: Reenable the large shift with small amount optimization.

To avoid problems with zero shifts when getting the bits that move between words
we use a trick: first shift the by amount-1, then do another shift by one. When
amount is 0 (and size 32) we first shift by 31, then by one, instead of by 32.

Also fix a latent bug that emitted the low and high words in the wrong order
when shifting right.

Fixes PR12113.

llvm-svn: 151637

2012-02-28 17:58:00 +00:00

3 Commits