Chris Lattner 0e03e40a76 Teach inst combine to merge GEPs through PHIs. This is really ... important because it is sinking the loads using the GEPs, but not the GEPs themselves. This triggers 647 times on 403.gcc and makes the .s file much much nicer. For example before: je LBB1_87 ## bb78 LBB1_62: ## bb77 leal 84(%esi), %eax LBB1_63: ## bb79 movl (%eax), %eax ... LBB1_87: ## bb78 movl $0, 4(%esp) movl %esi, (%esp) call L_make_decl_rtl$stub jmp LBB1_62 ## bb77 after: jne LBB1_63 ## bb79 LBB1_62: ## bb78 movl $0, 4(%esp) movl %esi, (%esp) call L_make_decl_rtl$stub LBB1_63: ## bb79 movl 84(%esi), %eax The input code was (and the GEPs are merged and the PHI is now eliminated by instcombine): br i1 %tmp233, label %bb78, label %bb77 bb77: %tmp234 = getelementptr %struct.tree_node* %t_addr.3, i32 0, i32 0, i32 22 br label %bb79 bb78: call void @make_decl_rtl(%struct.tree_node* %t_addr.3, i8* null) nounwind %tmp235 = getelementptr %struct.tree_node* %t_addr.3, i32 0, i32 0, i32 22 br label %bb79 bb79: %iftmp.12.0.in = phi %struct.rtx_def** [ %tmp235, %bb78 ], [ %tmp234, %bb77 ] %iftmp.12.0 = load %struct.rtx_def** %iftmp.12.0.in llvm-svn: 60322		2008-12-01 02:34:36 +00:00
..
Analysis	Reimplement the non-local dependency data structure in terms of a sorted	2008-12-01 01:15:42 +00:00
Archive	Silence unused variable warnings.	2008-11-21 20:00:59 +00:00
AsmParser	Extend the 'noalias' attribute to function return values. This is intended to	2008-11-24 03:41:24 +00:00
Bitcode	Added support for the following definition of shufflevector	2008-11-10 04:46:22 +00:00
CodeGen	Followup to r60283: optimize arbitrary width signed divisions as well	2008-11-30 06:35:39 +00:00
Debugger	Initial support for the CMake build system.	2008-09-22 01:08:49 +00:00
ExecutionEngine	Make JIT::runFunction handle functions with non-C calling conventions.	2008-11-23 08:00:11 +00:00
Linker	Make comments and code for QuietWarnings and QuietErrors	2008-10-25 17:57:20 +00:00
Support	fix build on some machines. thanks buildbot	2008-11-27 16:42:44 +00:00
System	ARM / Mac OS X also wants to invalidate icache after jitting.	2008-11-14 02:33:17 +00:00
Target	Implement ((A|B)&1)|(B&-2) -> (A&1) | B transformation. This also takes care of	2008-12-01 01:07:11 +00:00
Transforms	Teach inst combine to merge GEPs through PHIs. This is really	2008-12-01 02:34:36 +00:00
VMCore	improve const correctness.	2008-11-27 08:39:18 +00:00
Makefile