Evan Cheng bbbe413846 Remove a instcombine transform that (no longer?) makes sense: ... // C - zext(bool) -> bool ? C - 1 : C if (ZExtInst *ZI = dyn_cast<ZExtInst>(Op1)) if (ZI->getSrcTy()->isIntegerTy(1)) return SelectInst::Create(ZI->getOperand(0), SubOne(C), C); This ends up forming sext i1 instructions that codegen to terrible code. e.g. int blah(_Bool x, _Bool y) { return (x - y) + 1; } => movzbl %dil, %eax movzbl %sil, %ecx shll $31, %ecx sarl $31, %ecx leal 1(%rax,%rcx), %eax ret Without the rule, llvm now generates: movzbl %sil, %ecx movzbl %dil, %eax incl %eax subl %ecx, %eax ret It also helps with ARM (and pretty much any target that doesn't have a sext i1 :-). The transformation was done as part of Eli's r75531. He has given the ok to remove it. rdar://11748024 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159230 91177308-0d34-0410-b5e6-96231b3b80d8		2012-06-26 22:03:13 +00:00
..
Analysis	Enable the new LoopInfo algorithm by default.	2012-06-26 04:11:38 +00:00
Archive	Include cstdio in a few place that depended on getting it transitively through StringExtras.h	2012-03-23 11:35:30 +00:00
AsmParser	Extend the IL for selecting TLS models (PR9788)	2012-06-23 11:37:03 +00:00
Bitcode	llvm/lib: [CMake] Add explicit dependency to intrinsics_gen.	2012-06-24 13:32:01 +00:00
CodeGen	Allow targets to inject passes before the virtual register rewriter.	2012-06-26 17:09:29 +00:00
DebugInfo	Fix a C++11 UDL conflict.	2012-04-04 20:33:56 +00:00
ExecutionEngine	llvm/lib: [CMake] Add explicit dependency to intrinsics_gen.	2012-06-24 13:32:01 +00:00
Linker	Extend the IL for selecting TLS models (PR9788)	2012-06-23 11:37:03 +00:00
MC	EmitZerofill should take a 64-bit size or else it's chopping off large zero-filled global. rdar://11729134	2012-06-22 20:14:46 +00:00
Object	Added accessors for getting coff_relocation info	2012-06-18 19:47:16 +00:00
Support	Implement getHostCPUName for ARM/linux. This will be used to implement -march=native in clang.	2012-06-26 21:36:32 +00:00
TableGen	Emit TableGen's header comment with C-style comments, so it can be used from C89 code.	2012-06-19 17:04:16 +00:00
Target	X86: add GATHER intrinsics (AVX2) in LLVM	2012-06-26 19:47:59 +00:00
Transforms	Remove a instcombine transform that (no longer?) makes sense:	2012-06-26 22:03:13 +00:00
VMCore	improve optimization of invoke instructions:	2012-06-25 17:11:47 +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