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7db1f58b3a
llvm-mirror/lib
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Yonghong Song 7db1f58b3a bpf: Define instruction patterns for extensions and truncations between i32 to i64 
For transformations between i32 and i64, if it is explicit signed extension:
  - first cast the operand to i64
  - then use SLL + SRA to finish the extension.

if it is explicit zero extension:
  - first cast the operand to i64
  - then use SLL + SRL to finish the extension.

if it is explicit any extension:
  - just refer to 64-bit register.

if it is explicit truncation:
  - just refer to 32-bit subregister.

NOTE: Some of the zero extension sequences might be unnecessary, they will be
removed by an peephole pass on MachineInstruction layer.

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Reviewed-by: Yonghong Song <yhs@fb.com>
llvm-svn: 325981
2018-02-23 23:49:21 +00:00
..
Analysis [MemorySSA] Fix a cache invalidation bug with removed accesses 2018-02-23 23:07:18 +00:00
AsmParser [DebugInfo] Support DWARF v5 source code embedding extension 2018-02-23 23:01:06 +00:00
BinaryFormat Add DWARF for discriminated unions 2018-02-06 23:45:59 +00:00
Bitcode [DebugInfo] Support DWARF v5 source code embedding extension 2018-02-23 23:01:06 +00:00
CodeGen [DebugInfo] Support DWARF v5 source code embedding extension 2018-02-23 23:01:06 +00:00
DebugInfo [DebugInfo] Support DWARF v5 source code embedding extension 2018-02-23 23:01:06 +00:00
Demangle Silence a bunch of implicit fallthrough warnings 2017-12-19 22:05:25 +00:00
ExecutionEngine [ORC] Switch to shared_ptr ownership for SymbolSources in VSOs. 2018-02-21 21:55:57 +00:00
Fuzzer [libFuzzer] Delete llvm/lib/Fuzzer 2017-10-16 20:48:19 +00:00
FuzzMutate [llvm-opt-fuzzer] Add another pack of passes for continuous fuzzing 2018-02-19 11:57:07 +00:00
IR [DebugInfo] Support DWARF v5 source code embedding extension 2018-02-23 23:01:06 +00:00
IRReader LLParser: add an argument for overriding data layout and do not check alloca addr space 2018-01-30 22:32:39 +00:00
LineEditor
Linker Revert "[IRMover] Implement name based structure type mapping" 2018-02-21 20:12:18 +00:00
LTO [ThinLTO] Always create linked objects file for --thinlto-index-only= 2018-02-22 19:06:15 +00:00
MC [DebugInfo] Support DWARF v5 source code embedding extension 2018-02-23 23:01:06 +00:00
Object [WebAssembly] Add first claass symbol table to wasm objects 2018-02-23 05:08:34 +00:00
ObjectYAML [WebAssembly] Add first claass symbol table to wasm objects 2018-02-23 05:08:34 +00:00
Option [Option] For typo '-foo', suggest '--foo' 2018-01-09 19:38:04 +00:00
Passes Another try to commit 323321 (aggressive instruction combine). 2018-01-25 12:06:32 +00:00
ProfileData [SampleProf] NFC. Expose reusable functionality in SampleProfile. 2018-02-22 06:42:57 +00:00
Support llvm-config: Add advapi32 to --system-libs on Windows (PR36372) 2018-02-23 12:20:26 +00:00
TableGen Revert "TableGen: Fix typeIsConvertibleTo for record types" 2018-02-23 11:31:49 +00:00
Target bpf: Define instruction patterns for extensions and truncations between i32 to i64 2018-02-23 23:49:21 +00:00
Testing Force #define GTEST_LANG_CXX11. 2017-10-27 21:12:28 +00:00
ToolDrivers [COFF] Keep the underscore on exported decorated stdcall functions in MSVC mode 2018-01-20 11:44:32 +00:00
Transforms [InstCombine] simplify code for fabs(X) * fabs(X) -> X * X; NFC 2018-02-23 22:38:10 +00:00
WindowsManifest
XRay [XRay] clarify error messages when parsing broken traces 2018-01-30 13:41:34 +00:00
CMakeLists.txt
LLVMBuild.txt