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Author SHA1 Message Date
Eli Friedman ff1eaa7578 Make sure to replace the chain properly when DAGCombining a LOAD+EXTRACT_VECTOR_ELT into a single LOAD. Fixes PR10747/PR11393. 
llvm-svn: 144863
 2011-11-16 23:50:22 +00:00
Nadav Rotem 8a7beb80f0 Fixes a bug in the DAGCombiner. LoadSDNodes have two values (data, chain). 
If there is a store after the load node, then there is a chain, which means
that there is another user. Thus, asking hasOneUser would fail. Instead we
ask hasNUsesOfValue on the 'data' value.

llvm-svn: 131183
 2011-05-11 14:40:50 +00:00
Dan Gohman 40503396da Eliminate more uses of llvm-as and llvm-dis. 
llvm-svn: 81290
 2009-09-08 23:54:48 +00:00
Dan Gohman 0d4bbf2c4a Remove obsolete -f flags. 
llvm-svn: 79992
 2009-08-25 15:38:29 +00:00
Evan Cheng 1120279ae6 Instead of a vector load, shuffle and then extract an element. Load the element from address with an offset. 
pshufd $1, (%rdi), %xmm0
        movd %xmm0, %eax
=>
        movl 4(%rdi), %eax

llvm-svn: 51026
 2008-05-13 08:35:03 +00:00
Evan Cheng 615488ab45 - SSE4.1 extractfps extracts a f32 into a gr32 register. Very useful! Not. Fix the instruction specification and teaches lowering code to use it only when the only use is a store instruction. 
llvm-svn: 48746
 2008-03-24 21:52:23 +00:00