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Craig Topper 4508fe4c56 [InstCombine] Teach foldSelectICmpAndOr to recognize (select (icmp slt (trunc (X)), 0), Y, (or Y, C2)) 
Summary:
InstCombine likes to turn (icmp eq (and X, C1), 0) into (icmp slt (trunc (X)), 0) sometimes. This breaks foldSelectICmpAndOr's ability to recognize (select (icmp eq (and X, C1), 0), Y, (or Y, C2))->(or (shl (and X, C1), C3), y).

This patch tries to recover this. I had to flip around some of the early out checks so that I could create a new And instruction during the compare processing without it possibly never getting used.

Reviewers: spatel, majnemer, davide

Reviewed By: spatel

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D34184

llvm-svn: 306029
2017-06-22 16:23:30 +00:00
..
Analysis [BasicAA] Use MayAlias instead of PartialAlias for fallback. 2017-06-21 18:25:37 +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 [DAG] Add Target Store Merge pass ordering function 2017-06-22 15:07:49 +00:00
DebugInfo [DWARF] Support for DW_FORM_strx3 and complete support for DW_FORM_strx{1,2,4} 2017-06-21 19:37:44 +00:00
Demangle [ItaniumDemangle] Fix a exponential string copying bug 2017-05-28 23:24:52 +00:00
ExecutionEngine Revert [mips] Adds support for R_MIPS_26, HIGHER, HIGHEST relocations in RuntimeDyld 2017-06-22 12:48:04 +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 Add a "probe-stack" attribute 2017-06-21 18:46:50 +00:00
IRReader
LineEditor
Linker Support for taking the max of module flags when linking, use for PIE/PIC 2017-05-23 00:08:00 +00:00
LTO [ThinLTO] Remove unnecessary include of Linker.h (NFC) 2017-06-22 16:18:48 +00:00
MC [WebAssembly] Cleanup WasmObjectWriter.cpp. NFC 2017-06-21 23:46:41 +00:00
Object [llvm-readobj] Dump the COFF image load config 2017-06-22 01:10:29 +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 [EarlyCSE] Add option to use MemorySSA for function simplification run of EarlyCSE (off by default). 2017-06-10 15:20:03 +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 [Hexagon] Handle a global operand to A2_addi when creating duplexes 2017-06-22 15:53:31 +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 [InstCombine] Teach foldSelectICmpAndOr to recognize (select (icmp slt (trunc (X)), 0), Y, (or Y, C2)) 2017-06-22 16:23:30 +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