9 Commits

Author	SHA1	Message	Date
Dan Gohman	02538ac4d3	Make BasicAliasAnalysis a normal AliasAnalysis implementation which ... does normal initialization and normal chaining. Change the default AliasAnalysis implementation to NoAlias. Update StandardCompileOpts.h and friends to explicitly request BasicAliasAnalysis. Update tests to explicitly request -basicaa. llvm-svn: 116720	2010-10-18 18:04:47 +00:00
Chris Lattner	3decde9305	refix PR1143 by making basicaa analyze zexts of indices aggresively, ... which I broke with a recent patch. llvm-svn: 111452	2010-08-18 23:09:49 +00:00
Chris Lattner	a25c05ed15	fix a buggy test ... llvm-svn: 111354	2010-08-18 04:55:12 +00:00
Chris Lattner	5fe97e7aca	@test9 is a testcase for r89958. Before 89958, we misanalyzed the ... first expression as P+4+4*i which we considered to possibly alias P+4*j. Now we correctly analyze the former one as P+1+4*i. @test10 is a sanity test that verfies that we know that P+4+4*i != P+4*i. llvm-svn: 89960	2009-11-26 19:25:46 +00:00
Chris Lattner	1bf7ff704a	Implement PR1143 (at -m64) by making basicaa look through extensions. We ... previously already handled it at -m32 because there were no i32->i64 extensions for addressing. llvm-svn: 89959	2009-11-26 18:53:33 +00:00
Chris Lattner	631c5b2cb9	teach GetLinearExpression to be a bit more aggressive. ... llvm-svn: 89955	2009-11-26 17:00:01 +00:00
Chris Lattner	29bc8a91d3	Teach basicaa that x|c == x+c when the c bits of x are clear. This ... allows us to compile the example in readme.txt into: LBB1_1: ## %bb movl 4(%rdx,%rax), %ecx movl %ecx, %esi imull (%rdx,%rax), %esi imull %esi, %ecx movl %esi, 8(%rdx,%rax) imull %ecx, %esi movl %ecx, 12(%rdx,%rax) movl %esi, 16(%rdx,%rax) imull %ecx, %esi movl %esi, 20(%rdx,%rax) addq $16, %rax cmpq $4000, %rax jne LBB1_1 instead of: LBB1_1: movl (%rdx,%rax), %ecx imull 4(%rdx,%rax), %ecx movl %ecx, 8(%rdx,%rax) imull 4(%rdx,%rax), %ecx movl %ecx, 12(%rdx,%rax) imull 8(%rdx,%rax), %ecx movl %ecx, 16(%rdx,%rax) imull 12(%rdx,%rax), %ecx movl %ecx, 20(%rdx,%rax) addq $16, %rax cmpq $4000, %rax jne LBB1_1 GCC (4.2) doesn't seem to be able to eliminate the loads in this testcase either, it generates: L2: movl (%rdx), %eax imull 4(%rdx), %eax movl %eax, 8(%rdx) imull 4(%rdx), %eax movl %eax, 12(%rdx) imull 8(%rdx), %eax movl %eax, 16(%rdx) imull 12(%rdx), %eax movl %eax, 20(%rdx) addl $4, %ecx addq $16, %rdx cmpl $1002, %ecx jne L2 llvm-svn: 89952	2009-11-26 16:26:43 +00:00
Chris Lattner	12dacdd359	teach basicaa that A[i] != A[i+1]. ... llvm-svn: 89951	2009-11-26 16:18:10 +00:00
Chris Lattner	453751031a	rename test ... llvm-svn: 89950	2009-11-26 16:08:41 +00:00