Peter Collingbourne 27821d7200 LowerBitSets: Use byte arrays instead of bit sets to represent in-memory bit sets. ... By loading from indexed offsets into a byte array and applying a mask, a program can test bits from the bit set with a relatively short instruction sequence. For example, suppose we have 15 bit sets to lay out: A (16 bits), B (15 bits), C (14 bits), D (13 bits), E (12 bits), F (11 bits), G (10 bits), H (9 bits), I (7 bits), J (6 bits), K (5 bits), L (4 bits), M (3 bits), N (2 bits), O (1 bit) These bits can be laid out in a 16-byte array like this: Byte Offset 0123456789ABCDEF Bit 7 HHHHHHHHHIIIIIII 6 GGGGGGGGGGJJJJJJ 5 FFFFFFFFFFFKKKKK 4 EEEEEEEEEEEELLLL 3 DDDDDDDDDDDDDMMM 2 CCCCCCCCCCCCCCNN 1 BBBBBBBBBBBBBBBO 0 AAAAAAAAAAAAAAAA For example, to test bit X of A, we evaluate ((bits[X] & 1) != 0), or to test bit X of I, we evaluate ((bits[9 + X] & 0x80) != 0). This can be done in 1-2 machine instructions on x86, or 4-6 instructions on ARM. This uses the LPT multiprocessor scheduling algorithm to lay out the bits efficiently. Saves ~450KB of instructions in a recent build of Chromium. Differential Revision: http://reviews.llvm.org/D7954 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231043 91177308-0d34-0410-b5e6-96231b3b80d8		2015-03-03 00:49:28 +00:00
..
Analysis	[opaque pointer type] Add textual IR support for explicit type parameter to load instruction	2015-02-27 21:17:42 +00:00
Assembler	Teach DataLayout that alignments on basic types must be powers of two.	2015-03-02 09:35:03 +00:00
Bindings
Bitcode	[opaque pointer type] Add textual IR support for explicit type parameter to load instruction	2015-02-27 21:17:42 +00:00
BugPoint	[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction	2015-02-27 19:29:02 +00:00
CodeGen	Remap arguments and non-alloca values used by outlined C++ exception handlers.	2015-03-03 00:41:03 +00:00
DebugInfo	Revert r230979, should apply to all X86 ELF.	2015-03-02 18:50:18 +00:00
ExecutionEngine	[opaque pointer type] Add textual IR support for explicit type parameter to load instruction	2015-02-27 21:17:42 +00:00
Feature	[opaque pointer type] Add textual IR support for explicit type parameter to load instruction	2015-02-27 21:17:42 +00:00
FileCheck	FileCheck: Add CHECK-SAME	2015-02-26 04:53:00 +00:00
Instrumentation	[opaque pointer type] Add textual IR support for explicit type parameter to load instruction	2015-02-27 21:17:42 +00:00
Integer	[opaque pointer type] Add textual IR support for explicit type parameter to load instruction	2015-02-27 21:17:42 +00:00
JitListener	[opaque pointer type] Add textual IR support for explicit type parameter to load instruction	2015-02-27 21:17:42 +00:00
Linker	lit: Add 'cd' support to the internal shell and port some tests	2015-03-02 21:33:18 +00:00
LTO	[opaque pointer type] Add textual IR support for explicit type parameter to load instruction	2015-02-27 21:17:42 +00:00
MC	AVX-512: Add assembly parser support for Rounding mode	2015-03-02 15:00:34 +00:00
Object	lit: Add 'cd' support to the internal shell and port some tests	2015-03-02 21:33:18 +00:00
Other	[opaque pointer type] Add textual IR support for explicit type parameter to load instruction	2015-02-27 21:17:42 +00:00
SymbolRewriter
TableGen
tools	lit: Add 'cd' support to the internal shell and port some tests	2015-03-02 21:33:18 +00:00
Transforms	LowerBitSets: Use byte arrays instead of bit sets to represent in-memory bit sets.	2015-03-03 00:49:28 +00:00
Unit
Verifier	Teach the verifier to enforce that the alignment argument of memory intrinsics must be a power of 2.	2015-03-02 09:35:06 +00:00
YAMLParser
.clang-format
CMakeLists.txt
lit.cfg	Change SystemZ large tests to use the existing long_tests property	2015-03-02 19:34:11 +00:00
lit.site.cfg.in
Makefile
Makefile.tests
TestRunner.sh