7 Commits

Author	SHA1	Message	Date
Stuart Hastings	d17ae4e939	Revert 127359; it broke lencod. ... llvm-svn: 127382	2011-03-10 00:25:53 +00:00
Stuart Hastings	9955e2f912	X86 byval copies no longer always_inline. <rdar://problem/8706628> ... llvm-svn: 127359	2011-03-09 21:10:30 +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
Evan Cheng	9534ea03e8	Fix a number of byval / memcpy / memset related codegen issues. ... 1. x86-64 byval alignment should be max of 8 and alignment of type. Previously the code was not doing what the commit message was saying. 2. Do not use byte repeat move and store operations. These are slow. llvm-svn: 55139	2008-08-21 21:00:15 +00:00
Dan Gohman	544ab2c50b	Drop ISD::MEMSET, ISD::MEMMOVE, and ISD::MEMCPY, which are not Legal ... on any current target and aren't optimized in DAGCombiner. Instead of using intermediate nodes, expand the operations, choosing between simple loads/stores, target-specific code, and library calls, immediately. Previously, the code to emit optimized code for these operations was only used at initial SelectionDAG construction time; now it is used at all times. This fixes some cases where rep;movs was being used for small copies where simple loads/stores would be better. This also cleans up code that checks for alignments less than 4; let the targets make that decision instead of doing it in target-independent code. This allows x86 to use rep;movs in low-alignment cases. Also, this fixes a bug that resulted in the use of rep;stos for memsets of 0 with non-constant memory size when the alignment was at least 4. It's better to use the library in this case, which can be significantly faster when the size is large. This also preserves more SourceValue information when memory intrinsics are lowered into simple loads/stores. llvm-svn: 49572	2008-04-12 04:36:06 +00:00
Rafael Espindola	846c19dd70	Add support for byval function whose argument is not 32 bit aligned. ... To do this it is necessary to add a "always inline" argument to the memcpy node. For completeness I have also added this node to memmove and memset. I have also added getMem* functions, because the extra argument makes it cumbersome to use getNode and because I get confused by it :-) llvm-svn: 43172	2007-10-19 10:41:11 +00:00
Rafael Espindola	1de0c86717	Add support for having different alignment for objects on call frames. ... The x86-64 ABI states that objects passed on the stack have 8 byte alignment. Implement that. llvm-svn: 41768	2007-09-07 14:52:14 +00:00