8 Commits

Author	SHA1	Message	Date
Preston Gurd	f2ea70ae4a	Fix remaining lit tests which were failing when run on an Atom ... processor. Patches by Tyler Nowicki, Andy Zhang, and Preston Gurd! llvm-svn: 160520	2012-07-19 18:53:21 +00:00
Chris Lattner	eeba0c73e5	implement rdar://6653118 - fastisel should fold loads where possible. ... Since mem2reg isn't run at -O0, we get a ton of reloads from the stack, for example, before, this code: int foo(int x, int y, int z) { return x+y+z; } used to compile into: _foo: ## @foo subq $12, %rsp movl %edi, 8(%rsp) movl %esi, 4(%rsp) movl %edx, (%rsp) movl 8(%rsp), %edx movl 4(%rsp), %esi addl %edx, %esi movl (%rsp), %edx addl %esi, %edx movl %edx, %eax addq $12, %rsp ret Now we produce: _foo: ## @foo subq $12, %rsp movl %edi, 8(%rsp) movl %esi, 4(%rsp) movl %edx, (%rsp) movl 8(%rsp), %edx addl 4(%rsp), %edx ## Folded load addl (%rsp), %edx ## Folded load movl %edx, %eax addq $12, %rsp ret Fewer instructions and less register use = faster compiles. llvm-svn: 113102	2010-09-05 02:18:34 +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
Dan Gohman	9801ba451a	Refactor X86SelectConstAddr, folding it into X86SelectAddress. This ... results in better code for globals. Also, unbreak the local CSE for GlobalValue stub loads. llvm-svn: 56371	2008-09-19 22:16:54 +00:00
Evan Cheng	1e97901388	Fix a constant lowering bug. Now we can do load and store instructions with funky getelementptr embedded in the address operand. ... llvm-svn: 55975	2008-09-09 01:26:59 +00:00
Owen Anderson	b8c7ba228f	Fix the ordering of operands to the store (inverted relative to LLVM IR), and fix the testcase. ... llvm-svn: 55777	2008-09-04 16:48:33 +00:00
Owen Anderson	4f948bd87a	Add a first attempt at implementing stores for X86 fast isel using target hooks. ... Dan or Evan, please review. llvm-svn: 55764	2008-09-04 07:08:58 +00:00
Evan Cheng	8d8f47d50b	Load from GV stub should be locally CSE'd. ... llvm-svn: 55763	2008-09-04 06:18:33 +00:00