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1b4c429367
llvm-mirror/lib
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Simon Pilgrim 1b4c429367 [SelectionDAG] Add BITCAST handling to ComputeNumSignBits for splatted sign bits. 
For cases where we are BITCASTing to vectors of smaller elements, then if the entire source was a splatted sign (src's NumSignBits == SrcBitWidth) we can say that the dst's NumSignBit == DstBitWidth, as we're just splitting those sign bits across multiple elements.

We could generalize this but at the moment the only use case I have is to peek through bitcasts to vector comparison results.

Differential Revision: https://reviews.llvm.org/D37849

llvm-svn: 313543
2017-09-18 16:45:05 +00:00
..
Analysis [InstSimplify] fold sdiv/srem based on compare of dividend and divisor 2017-09-14 14:59:07 +00:00
AsmParser IR: Represent -ggnu-pubnames with a flag on the DICompileUnit. 2017-09-12 21:50:41 +00:00
BinaryFormat [BinaryFormat] Fix out of bounds read. 2017-08-31 12:50:42 +00:00
Bitcode [llvm] Fix some typos. NFC. 2017-09-15 20:01:43 +00:00
CodeGen [SelectionDAG] Add BITCAST handling to ComputeNumSignBits for splatted sign bits. 2017-09-18 16:45:05 +00:00
DebugInfo [dwarfdump] Make .eh_frame an alias for .debug_frame 2017-09-18 14:15:57 +00:00
Demangle
ExecutionEngine [ORC] Hook up the LLVMOrcAddObjectFile function in the Orc C Bindings. 2017-09-17 03:25:03 +00:00
Fuzzer Moving libFuzzer from LLVM to compiler-rt. 2017-08-21 23:25:12 +00:00
FuzzMutate Move some CLI utils out of llvm-isel-fuzzer and into the library 2017-09-02 23:43:04 +00:00
IR [X86] Remove VPERM2F128/VPERM2I128 intrinsics and autoupgrade to native shuffles. 2017-09-16 07:36:14 +00:00
IRReader
LineEditor
Linker Linker: Create a function declaration when moving a non-prevailing alias of function type. 2017-08-10 01:07:44 +00:00
LTO Revert "[ThinLTO] Avoid archive member collisions with old API" 2017-09-17 18:11:26 +00:00
MC Revert "Fix Bug 30978 by emitting cv file checksums." 2017-09-16 01:14:36 +00:00
Object [MachO] Prevent heap overflow when load command extends past EOF 2017-09-13 13:43:01 +00:00
ObjectYAML llvm-dwarfdump: support dumping UUIDs of Mach-O binaries. 2017-09-13 18:22:59 +00:00
Option Revert "Revert r311552: [Bash-autocompletion] Add support for static analyzer flags" 2017-08-29 00:09:31 +00:00
Passes [DivRempairs] add a pass to optimize div/rem pairs (PR31028) 2017-09-09 13:38:18 +00:00
ProfileData [Coverage] Build sorted and unique segments 2017-09-08 18:44:50 +00:00
Support [mips] Recognise the triple used by Debian for MIPS n32 ABI 2017-09-14 06:50:05 +00:00
TableGen Untabify. 2017-08-28 06:47:47 +00:00
Target [X86] Fix two more places to prefer VPERMQ/PD over VPERM2X128 when AVX2 is enabled 2017-09-18 16:39:49 +00:00
Testing
ToolDrivers [llvm-dlltool] Mention arm64 in the lists of architecture alternatives 2017-09-08 06:49:46 +00:00
Transforms [SLP] clean up for vector store case; NFCI 2017-09-18 16:20:15 +00:00
WindowsManifest Fix bug 34608 by moving private header out of public header. 2017-09-14 23:01:13 +00:00
XRay [XRay][tools] Support tail-call exits before we write them in the runtime 2017-09-18 06:08:46 +00:00
CMakeLists.txt Moving libFuzzer from LLVM to compiler-rt. 2017-08-21 23:25:12 +00:00
LLVMBuild.txt Re-apply "Introduce FuzzMutate library" 2017-08-21 22:57:06 +00:00