2 Commits

Author	SHA1	Message	Date
Dan Gohman	268cfea6bc	Fun x86 encoding tricks: when adding an immediate value of 128, ... use a SUB instruction instead of an ADD, because -128 can be encoded in an 8-bit signed immediate field, while +128 can't be. This avoids the need for a 32-bit immediate field in this case. A similar optimization applies to 64-bit adds with 0x80000000, with the 32-bit signed immediate field. To support this, teach tablegen how to handle 64-bit constants. llvm-svn: 57663	2008-10-17 01:33:43 +00:00
Reid Spencer	4572ce85b0	Regression is gone, don't try to find it on clean target. ... llvm-svn: 33296	2007-01-17 07:59:14 +00:00