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
Archive
Assembler	Extend the IL for selecting TLS models (PR9788)	2012-06-23 11:37:03 +00:00
Bindings/Ocaml
Bitcode	Add AutoUpgrade support for the SSE4 ptest intrinsics.	2012-06-10 18:42:51 +00:00
BugPoint
CodeGen	Fix llc's -print-before=pass and -print-after=pass.	2012-06-26 21:33:36 +00:00
DebugInfo	Emit relocations for DW_AT_location entries on systems which need it. This is	2012-06-22 01:25:12 +00:00
ExecutionEngine	Add Mips to the list of target architectures for the MCJIT tests.	2012-06-21 20:23:32 +00:00
Feature
Instrumentation
Integer
Linker
MC	X86: add GATHER intrinsics (AVX2) in LLVM	2012-06-26 19:47:59 +00:00
Object	Add relocation types for Hexagon processor; patch by Sidney Manning <sidneym@codeaurora.org>	2012-06-23 14:46:18 +00:00
Other
Scripts
TableGen
Transforms	Remove a instcombine transform that (no longer?) makes sense:	2012-06-26 22:03:13 +00:00
Unit
Verifier	revert r158660, since Chris has some issues with this patch (namely using code to reprent information only used by the compiler)	2012-06-18 23:34:26 +00:00
YAMLParser
CMakeLists.txt
lit.cfg
lit.site.cfg.in
Makefile
Makefile.tests
site.exp.in
TestRunner.sh