2 Commits

Author	SHA1	Message	Date
Michael Kuperstein	c69bb43f35	[X86] Convert esp-relative movs of function arguments into pushes, step 1 ... This handles the simplest case for mov -> push conversion: 1. x86-32 calling convention, everything is passed through the stack. 2. There is no reserved call frame. 3. Only registers or immediates are pushed, no attempt to combine a mem-reg-mem sequence into a single PUSHmm. Differential Revision: http://reviews.llvm.org/D6503 llvm-svn: 223757	2014-12-09 06:10:44 +00:00
Reid Kleckner	ab99e24e94	X86: Fix conflict over ESI between base register and rep;movsl ... The new solution is to not use this lowering if there are any dynamic allocas in the current function. We know up front if there are dynamic allocas, but we don't know if we'll need to create stack temporaries with large alignment during lowering. Conservatively assume that we will need such temporaries. Reviewed By: hans Differential Revision: http://reviews.llvm.org/D5128 llvm-svn: 216775	2014-08-29 20:50:31 +00:00