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Craig Topper 2c20c42cb6 [JumpThreading] Teach jump threading how to analyze (and (cmp A, C1), (cmp A, C2)) after InstCombine has turned it into (cmp (add A, C3), C4) 
Currently JumpThreading can use LazyValueInfo to analyze an 'and' or 'or' of compare if the compare is fed by a livein of a basic block. This can be used to to prove the condition can't be met for some predecessor and the jump from that predecessor can be moved to the false path of the condition.

But if the compare is something that InstCombine turns into an add and a single compare, it can't be analyzed because the livein is now an input to the add and not the compare.

This patch adds a new method to LVI to get a ConstantRange on an edge. Then we teach jump threading to detect the add livein feeding a compare and to get the ConstantRange and propagate it.

Differential Revision: https://reviews.llvm.org/D33262

llvm-svn: 306085
 		2017-06-23 05:41:35 +00:00
..
Analysis [JumpThreading] Teach jump threading how to analyze (and (cmp A, C1), (cmp A, C2)) after InstCombine has turned it into (cmp (add A, C3), C4) 2017-06-23 05:41:35 +00:00
AsmParser Add dependency from AsmParser to BinaryFormat. 2017-06-07 04:24:33 +00:00
BinaryFormat Move Object format code to lib/BinaryFormat. 2017-06-07 03:48:56 +00:00
Bitcode Fix build warning on 32-bit targets where sizeof(size_t) < sizeof(long long). 2017-06-16 00:32:11 +00:00
CodeGen Restrict the definition of loop preheader to avoid EH blocks 2017-06-22 23:27:16 +00:00
DebugInfo Fix build break by using llvm::make_unique instead of std::make_unique. 2017-06-22 18:57:51 +00:00
Demangle [ItaniumDemangle] Fix a exponential string copying bug 2017-05-28 23:24:52 +00:00
ExecutionEngine [ORC] Switch the object layer API from addObjectSet to addObject (singular), and 2017-06-22 21:06:54 +00:00
Fuzzer [libFuzzer] change the default max_len from 64 to 4096. This will affect cases where libFuzzer is run w/o initial corpus or with a corpus of very small items. 2017-06-15 22:43:40 +00:00
IR Restrict the definition of loop preheader to avoid EH blocks 2017-06-22 23:27:16 +00:00
IRReader Timer: Track name and description. 2016-11-18 19:43:18 +00:00
LTO [ThinLTO] Remove unnecessary include of Linker.h (NFC) 2017-06-22 16:18:48 +00:00
LineEditor
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Linker Support for taking the max of module flags when linking, use for PIE/PIC 2017-05-23 00:08:00 +00:00
MC COFF: Produce an error on invalid pcrel relocs. 2017-06-23 04:07:44 +00:00
Object Updated llvm-objdump symbolic disassembly with x86_64 Mach-O MH_KEXT_BUNDLE 2017-06-22 17:41:22 +00:00
ObjectYAML [codeview] respect signedness of APSInts when printing to YAML 2017-06-21 22:31:52 +00:00
Option [GSoC] Flag value completion for clang 2017-06-20 16:31:31 +00:00
Passes Remove the LoadCombine pass. It was never enabled and is unsupported. 2017-06-22 22:58:12 +00:00
ProfileData [ProfileData, Support] Fix some Clang-tidy modernize-use-using and Include What You Use warnings; other minor fixes (NFC). 2017-06-21 23:19:47 +00:00
Support Revert "[Support] Add RetryAfterSignal helper function" and subsequent fix 2017-06-22 14:18:55 +00:00
TableGen [BinaryFormat, Option, TableGen] Fix some Clang-tidy modernize-use-using and Include What You Use warnings; other minor fixes (NFC). 2017-06-16 00:43:26 +00:00
Target COFF: Produce an error on invalid pcrel relocs. 2017-06-23 04:07:44 +00:00
Testing Mark LLVMTestingSupport as not installed in LLVMBuild. 2017-06-19 22:01:50 +00:00
ToolDrivers [GSoC] Flag value completion for clang 2017-06-20 16:31:31 +00:00
Transforms [JumpThreading] Teach jump threading how to analyze (and (cmp A, C1), (cmp A, C2)) after InstCombine has turned it into (cmp (add A, C3), C4) 2017-06-23 05:41:35 +00:00
XRay Sort the remaining #include lines in include/... and lib/.... 2017-06-06 11:49:48 +00:00
CMakeLists.txt [gtest] Create a shared include directory for gtest utilities. 2017-06-14 16:41:50 +00:00
LLVMBuild.txt [gtest] Create a shared include directory for gtest utilities. 2017-06-14 16:41:50 +00:00