Chris Lattner 445d8c6b50 fold comparisons of gep'd alloca points with null to false, ... implementing PR12013. We now compile the testcase to: __Z4testv: ## @_Z4testv ## BB#0: ## %_ZN4llvm15SmallVectorImplIiE9push_backERKi.exit pushq %rbx subq $64, %rsp leaq 32(%rsp), %rbx movq %rbx, (%rsp) leaq 64(%rsp), %rax movq %rax, 16(%rsp) movl $1, 32(%rsp) leaq 36(%rsp), %rax movq %rax, 8(%rsp) leaq (%rsp), %rdi callq __Z1gRN4llvm11SmallVectorIiLj8EEE movq (%rsp), %rdi cmpq %rbx, %rdi je LBB0_2 ## BB#1: callq _free LBB0_2: ## %_ZN4llvm11SmallVectorIiLj8EED1Ev.exit addq $64, %rsp popq %rbx ret instead of: __Z4testv: ## @_Z4testv ## BB#0: pushq %rbx subq $64, %rsp xorl %eax, %eax leaq (%rsp), %rbx addq $32, %rbx movq %rbx, (%rsp) movq %rbx, 8(%rsp) leaq 64(%rsp), %rcx movq %rcx, 16(%rsp) je LBB0_2 ## BB#1: movl $1, 32(%rsp) movq %rbx, %rax LBB0_2: ## %_ZN4llvm15SmallVectorImplIiE9push_backERKi.exit addq $4, %rax movq %rax, 8(%rsp) leaq (%rsp), %rdi callq __Z1gRN4llvm11SmallVectorIiLj8EEE movq (%rsp), %rdi cmpq %rbx, %rdi je LBB0_4 ## BB#3: callq _free LBB0_4: ## %_ZN4llvm11SmallVectorIiLj8EED1Ev.exit addq $64, %rsp popq %rbx ret This doesn't shrink clang noticably though. llvm-svn: 150944		2012-02-20 00:42:49 +00:00
..
2010-12-20-Boolean.ll	Rename this test.	2011-01-14 14:16:33 +00:00
2010-12-20-Distribute.ll	Simplify (X<<1)-X into X. According to my auto-simplier this is the most common missed	2011-01-18 09:24:58 +00:00
2011-01-14-Thread.ll	Factorize common code out of the InstructionSimplify shift logic. Add in	2011-01-14 14:44:12 +00:00
2011-02-01-Vector.ll	Have m_One also match constant vectors for which every element is 1.	2011-02-01 08:39:12 +00:00
2011-09-05-InsertExtractValue.ll	InstSimplify: Don't try to replace an extractvalue/insertvalue pair with the original value if types don't match.	2011-09-05 18:16:19 +00:00
2011-10-27-BinOpCrash.ll	Reapply commit 143028 with a fix: the problem was casting a ConstantExpr Mul	2011-10-27 19:16:21 +00:00
2011-11-23-MaskedBitsCrash.ll	Fix a crash in which a multiplication was being reported as being both negative	2011-11-23 16:26:47 +00:00
AndOrXor.ll	A shift of a power of two is a power of two or zero.	2011-10-28 18:30:05 +00:00
compare.ll	fold comparisons of gep'd alloca points with null to false,	2012-02-20 00:42:49 +00:00
exact-nsw-nuw.ll	Teach instsimplify some tricks about exact/nuw/nsw shifts.	2011-02-09 17:15:04 +00:00
fdiv.ll	Move InstCombine's knowledge of fdiv to SimplifyInstruction().	2011-01-29 15:26:31 +00:00
lit.local.cfg	Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed.	2012-02-16 06:28:33 +00:00
maxmin.ll	The comparision "max(x,y)==x" is equivalent to "x>=y". Since the max is	2011-05-07 16:56:49 +00:00
reassociate.ll	teach instsimplify to transform (X / Y) * Y to X	2011-02-06 22:05:31 +00:00
rem.ll	Move some rem transforms out of instcombine and into instsimplify.	2011-05-02 16:27:02 +00:00
undef.ll	Add tests for existing InstSimplify features.	2011-11-04 18:39:16 +00:00
vector_gep.ll	Add support for vectors of pointers.	2011-12-05 06:29:09 +00:00