2 Commits

Author	SHA1	Message	Date
Rafael Espindola	6a6d9e48dd	Don't force promotion of return arguments on the callee. ... Some architectures (like x86) don't require it. This fixes bug 3779. llvm-svn: 67132	2009-03-17 23:43:59 +00:00
Chris Lattner	8209f83091	Teach CodeGenPrepare to look through Bitcast instructions when attempting to ... optimize addressing modes. This allows us to optimize things like isel-sink2.ll into: movl 4(%esp), %eax cmpb $0, 4(%eax) jne LBB1_2 ## F LBB1_1: ## TB movl $4, %eax ret LBB1_2: ## F movzbl 7(%eax), %eax ret instead of: _test: movl 4(%esp), %eax cmpb $0, 4(%eax) leal 4(%eax), %eax jne LBB1_2 ## F LBB1_1: ## TB movl $4, %eax ret LBB1_2: ## F movzbl 3(%eax), %eax ret This shrinks (e.g.) 403.gcc from 1133510 to 1128345 lines of .s. Note that the 2008-10-16-SpillerBug.ll testcase is dubious at best, I doubt it is really testing what it thinks it is. llvm-svn: 60068	2008-11-26 00:26:16 +00:00