6 Commits

Author	SHA1	Message	Date
Akira Hatanaka	2020e27d6d	Do not use $gp as a dedicated global register if the target ABI is not O32. ... llvm-svn: 155522	2012-04-25 01:24:52 +00:00
Craig Topper	c7242e054d	Convert more uses of XXXRegisterClass to &XXXRegClass. No functional change since they are equivalent. ... llvm-svn: 155188	2012-04-20 07:30:17 +00:00
Jia Liu	f54f60f3ce	remove blanks, and some code format ... llvm-svn: 151625	2012-02-28 07:46:26 +00:00
Akira Hatanaka	b049aef2d1	Add an option to use a virtual register as the global base register instead of ... reserving a physical register ($gp or $28) for that purpose. This will completely eliminate loads that restore the value of $gp after every function call, if the register allocator assigns a callee-saved register, or eliminate unnecessary loads if it assigns a temporary register. example: .cpload $25 // set $gp. ... .cprestore 16 // store $gp to stack slot 16($sp). ... jalr $25 // function call. clobbers $gp. lw $gp, 16($sp) // not emitted if callee-saved reg is chosen. ... lw $2, 4($gp) ... jalr $25 // function call. lw $gp, 16($sp) // not emitted if $gp is not live after this instruction. ... llvm-svn: 151402	2012-02-24 22:34:47 +00:00
Jia Liu	9f6101191b	remove Emacs-tag form .cpp files in Mips Backend, and fix some typo. ... llvm-svn: 150805	2012-02-17 08:55:11 +00:00
David Blaikie	a379b18173	Unweaken vtables as per http://llvm.org/docs/CodingStandards.html#ll_virtual_anch ... llvm-svn: 146960	2011-12-20 02:50:00 +00:00