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Daniel Sanders f803237926 [globalisel][knownbits] Account for missing type constraints 
Now that we look through copies, it's possible to visit registers that
have a register class constraint but not a type constraint. Avoid looking
through copies when this occurs as the SrcReg won't be able to determine
it's bit width or any known bits.

Along the same lines, if the initial query is on a register that doesn't
have a type constraint then the result is a default-constructed KnownBits,
that is, a 1-bit fully-unknown value.

llvm-svn: 371116
 		2019-09-05 20:26:02 +00:00
..
Analysis [LLVM][Alignment] Convert isLegalNTStore/isLegalNTLoad to llvm::Align 2019-09-05 13:09:42 +00:00
AsmParser [llvm] Migrate llvm::make_unique to std::make_unique 2019-08-15 15:54:37 +00:00
BinaryFormat [BinaryFormat] Teach identify_magic about Tapi files. 2019-08-21 21:00:16 +00:00
Bitcode Do a sweep of symbol internalization. NFC. 2019-08-23 19:59:23 +00:00
Bitstream [Bitcode] Move Bitstream to a separate library 2019-07-03 22:40:07 +00:00
CodeGen [globalisel][knownbits] Account for missing type constraints 2019-09-05 20:26:02 +00:00
DebugInfo [DWARF] Fix referencing Range List Tables from CUs for DWARF64. 2019-09-05 07:02:28 +00:00
Demangle llvm-undname: Correctly demangle vararg parameters 2019-06-04 19:10:08 +00:00
ExecutionEngine [ORCv2] - New Speculate Query Implementation 2019-08-27 18:23:36 +00:00
FuzzMutate [llvm] Migrate llvm::make_unique to std::make_unique 2019-08-15 15:54:37 +00:00
Fuzzer
…
IR [IRPrinting] Improve module pass printer to work better with -filter-print-funcs 2019-09-04 08:08:58 +00:00
IRReader
…
LTO Do a sweep of symbol internalization. NFC. 2019-08-23 19:59:23 +00:00
LineEditor [CMake] Delete redundant DEPENDS/LINK_LIBS from LineEditor/XRay 2019-06-22 01:50:21 +00:00
Linker Linker: Add support for GlobalIFunc. 2019-08-08 22:09:18 +00:00
MC [MC] Pass through .code16/32/64 and .syntax unified for COFF 2019-09-03 18:16:52 +00:00
MCA [Tblgen][MCA] Add the ability to mark groups as LoadQueue and StoreQueue. NFCI 2019-08-27 18:20:34 +00:00
Object [LLD] [COFF] Implement MinGW default manifest handling 2019-09-04 20:34:00 +00:00
ObjectYAML [yaml2obj] Write the section header table after section contents 2019-09-05 14:25:57 +00:00
Option [llvm] Migrate llvm::make_unique to std::make_unique 2019-08-15 15:54:37 +00:00
Passes [MergedLoadStoreMotion] Sink stores to BB with more than 2 predecessors 2019-09-05 17:00:32 +00:00
ProfileData [InstrProf] Tighten a check for malformed data records in raw profiles 2019-09-03 22:23:14 +00:00
Remarks [Remarks] Don't serialize metadata if a string table is not used 2019-09-05 18:30:20 +00:00
Support [Support] Add writeFileAtomically() to FileUtilities 2019-09-05 18:10:29 +00:00
TableGen [llvm] Migrate llvm::make_unique to std::make_unique 2019-08-15 15:54:37 +00:00
Target Recommit "[AArch64][GlobalISel] Teach AArch64CallLowering to handle basic sibling calls" 2019-09-05 20:18:34 +00:00
Testing [Testing] Move clangd::Annotations to llvm testing support 2019-04-25 10:08:31 +00:00
TextAPI [TextAPI] Update reader to be supported by lib/Object 2019-08-16 15:30:48 +00:00
ToolDrivers [llvm-dlltool] Handle external and internal names with differing decoration 2019-09-02 13:28:16 +00:00
Transforms [InstCombine] foldICmpBinOp(): consider inverted check in 'unsigned sub overflow' check 2019-09-05 17:41:02 +00:00
WindowsManifest Fight a bit against global initializers. NFC. 2019-08-22 19:43:27 +00:00
XRay [llvm] Migrate llvm::make_unique to std::make_unique 2019-08-15 15:54:37 +00:00
CMakeLists.txt Fix build errors LLVM tests are disabled. 2019-07-11 22:08:35 +00:00
LLVMBuild.txt [Bitcode] Move Bitstream to a separate library 2019-07-03 22:40:07 +00:00