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4 Commits

Author SHA1 Message Date
Evan Cheng
a93c834b1a Add test case for r160387 
llvm-svn: 160389
 2012-07-17 19:40:05 +00:00
Benjamin Kramer
ae4ad5f924 X86: Generalize the x << (y & const) optimization to also catch masks with more set bits set than 31 or 63. 
llvm-svn: 148024
 2012-01-12 12:41:34 +00:00
Dan Gohman
df2896d609 Eliminate more uses of llvm-as and llvm-dis. 
llvm-svn: 81290
 2009-09-08 23:54:48 +00:00
Evan Cheng
4bc8c9652e Transform (x << (y&31)) -> (x << y). This takes advantage of the fact x86 shift instructions 2nd operand (shift count) is limited to 0 to 31 (or 63 in the x86-64 case). 
llvm-svn: 55558
 2008-08-30 02:03:58 +00:00