Chris Lattner b053fc1c92 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150944 91177308-0d34-0410-b5e6-96231b3b80d8		2012-02-20 00:42:49 +00:00
..
Analysis	fold comparisons of gep'd alloca points with null to false,	2012-02-20 00:42:49 +00:00
Archive	Avoid using an invalidated iterator.	2012-01-23 05:07:16 +00:00
AsmParser	Convert assert(0) to llvm_unreachable	2012-02-07 05:05:23 +00:00
Bitcode	Enable streaming of bitcode	2012-02-06 22:30:29 +00:00
CodeGen	Silence operator precedence warning.	2012-02-19 12:25:07 +00:00
DebugInfo	More dead code removal (using -Wunreachable-code)	2012-01-20 21:51:11 +00:00
ExecutionEngine	Remove dead code. Improve llvm_unreachable text. Simplify some control flow.	2012-02-19 11:37:01 +00:00
Linker	Capitalize messages so that they appear nicely with the linker's error messages.	2012-02-14 09:13:54 +00:00
MC	Remove dead code. Improve llvm_unreachable text. Simplify some control flow.	2012-02-19 11:37:01 +00:00
Object	Expose the ELFObjectFile class directly in the Object/ELF.h header, similarly	2012-02-12 06:12:10 +00:00
Support	Move constructors out-of-line and flesh out their documentation. No	2012-02-20 00:02:47 +00:00
TableGen	StringRef'ize EmitSourceFileHeader().	2012-02-19 11:35:20 +00:00
Target	Remove dead code. Improve llvm_unreachable text. Simplify some control flow.	2012-02-19 11:37:01 +00:00
Transforms	Move EvaluateFunction and EvaluateBlock into a class, and make the class store	2012-02-19 23:26:27 +00:00
VMCore	Remove dead code. Improve llvm_unreachable text. Simplify some control flow.	2012-02-19 11:37:01 +00:00
CMakeLists.txt	Move TableGen's parser and entry point into a library	2011-10-01 16:41:13 +00:00
LLVMBuild.txt	LLVMBuild: Introduce a common section which currently has a list of the	2011-12-12 22:45:54 +00:00
Makefile	Remove more of llvmc and dependencies.	2011-09-20 00:34:27 +00:00