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Sander de Smalen 5b691a10c0 [TableGen][AsmMatcherEmitter] Fix tied-constraint checking for InstAliases 
Summary:
This is a bit of a reimplementation the work done in
https://reviews.llvm.org/D41446, since that patch only really works for
tied operands of instructions, not aliases.

Instead of checking the constraints based on the matched instruction's opcode,
this patch uses the match-info's convert function to check the operand
constraints for that specific instruction/alias.
This is based on the matched operands for the instruction, not the
resulting opcode of the MCInst.

This patch adds the following enum/table to the *GenAsmMatcher.inc file:
  enum {
    Tie0_1_1,
    Tie0_1_2,
    Tie0_1_5,
    ...
  };

  const char TiedAsmOperandTable[][3] = {
    /* Tie0_1_1 */ { 0, 1, 1 },
    /* Tie0_1_2 */ { 0, 1, 2 },
    /* Tie0_1_5 */ { 0, 1, 5 },
    ...
  };

And it is referenced directly in the ConversionTable, like this:
static const uint8_t ConversionTable[CVT_NUM_SIGNATURES][13] = {
  ...
  { CVT_95_addRegOperands, 1,
    CVT_95_addRegOperands, 2,
    CVT_Tied, Tie0_1_5,
    CVT_95_addRegOperands, 6, CVT_Done },
  ...


The Tie0_1_5 (and corresponding table) encodes that:
* Result operand 0 is the operand to copy (which is e.g. done when
  building up the operands to the MCInst in convertToMCInst())
* Asm operands 1 and 5 should be the same operands (which is checked
  in checkAsmTiedOperandConstraints()).

Reviewers: olista01, rengolin, fhahn, craig.topper, echristo, apazos, dsanders

Reviewed By: olista01

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D42293

llvm-svn: 324196
 		2018-02-04 16:24:17 +00:00
clang Recommit rL323952: [DebugInfo] Enable debug information for C99 VLA types. 2018-02-03 13:55:59 +00:00
clang-tools-extra [clangd] Fix ExternC test broken by r324081 2018-02-02 17:01:36 +00:00
compiler-rt Use NULL instead of nullptr in invalid-pointer-pairs-compare-null.cc; nullptr is not available on older Darwin systems. 2018-02-02 20:42:29 +00:00
debuginfo-tests [debuginfo-tests] Support moving debuginfo-tests to llvm/projects 2017-12-12 16:54:20 +00:00
libclc half_powr: Implement using powr 2018-02-01 03:00:35 +00:00
libcxx Fix initialization of array<const T, 0> with GCC. 2018-02-04 08:02:35 +00:00
libcxxabi [demangler] Clean up the expression parser 2018-02-02 18:04:32 +00:00
libunwind [cmake] [libunwind] LLVM_FOUND isn't always set, so just test if 2018-01-27 19:31:44 +00:00
lld [WebAssembly] Refactor linker-generated symbols. NFC. 2018-02-02 22:59:56 +00:00
lldb Turn off the deprecated ALWAYS_SEARCH_USER_PATHS feature 2018-02-03 00:37:46 +00:00
llgo irgen: Create functions instead of global variables for builtin hash and equal algorithms. 2017-06-04 22:11:28 +00:00
llvm [TableGen][AsmMatcherEmitter] Fix tied-constraint checking for InstAliases 2018-02-04 16:24:17 +00:00
openmp [OpenMP-RT] Fix debug string for NVPTX runtime library 2018-02-01 16:12:16 +00:00
parallel-libs [Axccel] Remove -Wno-missing-braces in build 2016-12-19 21:34:07 +00:00
polly [ScopBuilder] Make -polly-stmt-granularity=scalar-indep the default. 2018-02-03 06:59:47 +00:00
README.md Add an svn project to contain the files that appear at the root of the 2017-10-19 21:09:49 +00:00

README.md

Low Level Virtual Machine (LLVM)

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.