Commit Graph

75 Commits

Author SHA1 Message Date
Philipp Krones 632ebc4ab4 [MC] Untangle MCContext and MCObjectFileInfo
This untangles the MCContext and the MCObjectFileInfo. There is a circular
dependency between MCContext and MCObjectFileInfo. Currently this dependency
also exists during construction: You can't contruct a MOFI without a MCContext
without constructing the MCContext with a dummy version of that MOFI first.
This removes this dependency during construction. In a perfect world,
MCObjectFileInfo wouldn't depend on MCContext at all, but only be stored in the
MCContext, like other MC information. This is future work.

This also shifts/adds more information to the MCContext making it more
available to the different targets. Namely:

- TargetTriple
- ObjectFileType
- SubtargetInfo

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D101462
2021-05-05 10:03:02 -07:00
Anirudh Prasad ae2aef1361 [AsmParser][SystemZ][z/OS] Reject character and string literals for HLASM
- As per the HLASM support we are providing, i.e. support only for the first parameter of the inline asm block, only pertaining to Z machine instructions defined in LLVM, character literals and string literals are not supported (see Figure 4 - https://www-01.ibm.com/servers/resourcelink/svc00100.nsf/pages/zOSV2R3sc264940/$file/asmr1023.pdf for more information)
- This patch explicitly rejects the usage of char literals and string literals (for example "abc 'a'") when the relevant field is set
- This is achieved by introducing a field called `LexHLASMStrings` in MCAsmLexer similar to `LexMasmStrings`

Reviewed By: abhina.sreeskantharajan, Kai

Differential Revision: https://reviews.llvm.org/D101660
2021-05-05 10:21:55 -04:00
Anirudh Prasad ca02fab7e7 [AsmParser][SystemZ][z/OS] Implement HLASM location counter syntax ("*") for Z PC-relative instructions.
- This patch attempts to implement the location counter syntax (*) for the HLASM variant for PC-relative instructions.
- In the HLASM variant, for purely constant relocatable values, we expect a * token preceding it, with special support for " *" which is parsed as "<pc-rel-insn 0>"
- For combinations of absolute values and relocatable values, we don't expect the "*" preceding the token.

When you have a " * "  what’s accepted is:

```
*<space>.*{.*} -> <pc-rel-insn> 0
*[+|-][constant-value] -> <pc-rel-insn> [+|-]constant-value
```

When you don’t have a " * " what’s accepted is:

```
brasl  1,func           is allowed (MCSymbolRef type)
brasl  1,func+4         is allowed (MCBinary type)
brasl  1,4+func         is allowed (MCBinary type)
brasl  1,-4+func        is allowed (MCBinary type)
brasl  1,func-4         is allowed (MCBinary type)
brasl  1,*func          is not allowed (* cannot be used for non-MCConstantExprs)
brasl  1,*+func         is not allowed (* cannot be used for non-MCConstantExprs)
brasl  1,*+func+4       is not allowed (* cannot be used for non-MCConstantExprs)
brasl  1,*+4+func       is not allowed (* cannot be used for non-MCConstantExprs)
brasl  1,*-4+8+func     is not allowed (* cannot be used for non-MCConstantExprs)
```

Reviewed By: Kai

Differential Revision: https://reviews.llvm.org/D100987
2021-05-03 14:58:24 -04:00
Anirudh Prasad ded0a70aeb [AsmParser][SystemZ][z/OS] Reject "Dot" as current PC on z/OS
- Currently, the "." (Dot) character, when not identifying an Identifier or a Constant, refers to the current PC (Program Counter)
- However, in z/OS, for the HLASM dialect, it strictly accepts only the "*" as the current PC (Support for this will be put up in a follow-up patch)
- The changes in this patch allow individual platforms to choose whether they would like to use the "." (Dot) character as a marker for the current PC or not.
- It is achieved by introducing a new field in MCAsmInfo.h called `DotIsPC` (similar to `DollarIsPC`)

Reviewed By: abhina.sreeskantharajan

Differential Revision: https://reviews.llvm.org/D100975
2021-04-29 11:58:54 -04:00
Anirudh Prasad 07b0a72d8e [AsmParser][SystemZ][z/OS] Use updated framework in AsmLexer to accept special tokens as Identifiers
- Previously, https://reviews.llvm.org/D99889 changed the framework in the AsmLexer to treat special tokens, if they occur at the start of the string, as Identifiers.
- These are used by the MASM Parser implementation in LLVM, and we can extend some of the changes made in the previous patch to SystemZ.
- In SystemZ, the special "tokens" referred to here are "_", "$", "@", "#". [_|$|@|#] are already supported as "part" of an Identifier.
- The changes in this patch ensure that these special tokens, when they occur at the start of the Identifier, are treated as Identifiers.

Reviewed By: abhina.sreeskantharajan

Differential Revision: https://reviews.llvm.org/D100959
2021-04-28 15:43:24 -04:00
Anirudh Prasad 8f6185c713 [AsmParser][ms][X86] Fix possible misbehaviour in parsing of special tokens at start of string.
- Previously, https://reviews.llvm.org/D72680 introduced a new attribute called `AllowSymbolAtNameStart` (in relation to the MAsmParser changes) in `MCAsmInfo.h` which (according to the comment in the header) allows the following behaviour:

```
  /// This is true if the assembler allows $ @ ? characters at the start of
  /// symbol names. Defaults to false.
```

- However, the usage of this field in AsmLexer.cpp doesn't seem completely accurate* for a couple of reasons.

```
  default:
    if (MAI.doesAllowSymbolAtNameStart()) {
      // Handle Microsoft-style identifier: [a-zA-Z_$.@?][a-zA-Z0-9_$.@#?]*
      if (!isDigit(CurChar) &&
          isIdentifierChar(CurChar, MAI.doesAllowAtInName(),
                           AllowHashInIdentifier))
        return LexIdentifier();
    }
```

1. The Dollar and At tokens, when occurring at the start of the string, are treated as separate tokens (AsmToken::Dollar and AsmToken::At respectively) and not lexed as an Identifier.
2. I'm not too sure why `MAI.doesAllowAtInName()` is used when `AllowAtInIdentifier` could be used. For X86 platforms, afaict, this shouldn't be an issue, since the `CommentString` attribute isn't "@". (alternatively the call to the setter can be set anywhere else as needed). The `AllowAtInName` does have an additional important meaning, but in the context of AsmLexer, shouldn't mean anything different compared to `AllowAtInIdentifier`

My proposal is the following:

- Introduce 3 new fields called `AllowQuestionTokenAtStartOfString`, `AllowDollarTokenAtStartOfString` and `AllowAtTokenAtStartOfString` in MCAsmInfo.h which will encapsulate the previously documented behaviour of "allowing $, @, ? characters at the start of symbol names")
- Introduce these fields where "$", "@" are lexed, and treat them as identifiers depending on whether `Allow[Dollar|At]TokenAtStartOfString` is set.
- For the sole case of "?", append it to the existing logic for treating a "default" token as an Identifier.

z/OS (HLASM) will also make use of some of these fields in follow up patches.

completely accurate* - This was based on the comments and the intended behaviour the code. I might have completely misinterpreted it, and if that is the case my sincere apologies. We can close this patch if necessary, if there are no changes to be made :)

Depends on https://reviews.llvm.org/D99374

Reviewed By: Jonathan.Crowther

Differential Revision: https://reviews.llvm.org/D99889
2021-04-21 10:21:09 -04:00
Anirudh Prasad 6ddd8c28b7 [AsmParser][SystemZ][z/OS] Add support to AsmLexer to accept HLASM style integers
- Add support for HLASM style integers. These are the decimal integers [0-9].
- HLASM does not support the additional prefixed integers like, `0b`, `0x`, octal integers and Masm style integers.
- To achieve this, a field `LexHLASMStyleIntegers` (similar to the `LexMasmStyleIntegers` field) is introduced in `MCAsmLexer.h` as well as a corresponding setter.

Note: This field could also go into MCAsmInfo.h. I used the previous precedent set by the `LexMasmIntegers` field.

Depends on https://reviews.llvm.org/D99286

Reviewed By: epastor

Differential Revision: https://reviews.llvm.org/D99374
2021-04-13 15:29:37 -04:00
Anirudh Prasad f7eec83932 [AsmParser][SystemZ][z/OS] Add in support to allow use of additional comment strings.
- Currently, MCAsmInfo provides a CommentString attribute, that various targets can set, so that the AsmLexer can appropriately lex a string as a comment based on the set value of the attribute.
- However, AsmLexer also supports a few additional comment syntaxes, in addition to what's specified as a CommentString attribute. This includes regular C-style block comments (/* ... */), regular C-style line comments (// .... ) and #. While I'm not sure as to why this behaviour exists, I am assuming it does to maintain backward compatibility with GNU AS (see https://sourceware.org/binutils/docs/as/Comments.html#Comments for reference)
For example:
Consider a target which sets the CommentString attribute to '*'.
The following strings are all lexed as comments.

```
"# abc" -> comment
"// abc" -> comment
"/* abc */ -> comment
"* abc" -> comment
```

- In HLASM however, only "*" is accepted as a comment string, and nothing else.
- To achieve this, an additional attribute (`AllowAdditionalComments`) has been added to MCAsmInfo. If this attribute is set to false, then only the string specified by the CommentString attribute is used as a possible comment string to be lexed by the AsmLexer. The regular C-style block comments, line comments and "#" are disabled. As a final note, "#" will still be treated as a comment, if the CommentString attribute is set to "#".

Depends on https://reviews.llvm.org/D99277

Reviewed By: abhina.sreeskantharajan, myiwanch

Differential Revision: https://reviews.llvm.org/D99286
2021-04-13 11:15:09 -04:00
Anirudh Prasad 7b921a6747 [AsmParser][SystemZ][z/OS] Add in support to accept "#" as part of an Identifier token
- This patch adds in support to accept the "#" character as part of an Identifier.
- This support is needed especially for the HLASM dialect since "#" is treated as part of the valid "Alphabet" range
- The way this is done is by making use of the previous precedent set by the `AllowAtInIdentifier` field in `MCAsmLexer.h`. A new field called `AllowHashInIdentifier` is introduced.
- The static function `IsIdentifierChar` is also updated to accept the `#` character if the `AllowHashInIdentifier` field is set to true.
Note: The field introduced in `MCAsmLexer.h` could very well be moved to `MCAsmInfo.h`. I'm not opposed to it. I decided to put it in `MCAsmLexer` since there seems to be some sort of precedent already with `AllowAtInIdentifier`.

Reviewed By: abhina.sreeskantharajan, nickdesaulniers, MaskRay

Differential Revision: https://reviews.llvm.org/D99277
2021-04-01 11:24:43 -04:00
Anirudh Prasad 301d9261b7 [AsmParser][SystemZ][z/OS] Re-introduce HLASM comment syntax
- https://reviews.llvm.org/rGb605cfb336989705f391d255b7628062d3dfe9c3 was reverted due to sanitizer bugs in the introduced unit-test (specifically in the Address sanitizer https://lab.llvm.org/buildbot/#/builders/5/builds/5697)
- This patch attempts to rectify that, as well as re-factor parts of the test
- The issue was previously, within the `setupCallToAsmParser` function in the unit-test, `SrcMgr` was declared as a local variable. `SrcMgr` owns a unique pointer. Since the variable goes out of scope at the end of the function, the unique pointer is released.
- This patch, moves the declaration of the `SrcMgr` variable to a class field, since the scope will remain until the class's destructor is invoked (which in this case is at the end of the unit test)
- Furthermore, this patch also moves the `MCContext Ctx` declaration from a local variable instance inside a function, to a unique pointer class field. This ensures the instantiation of the MCContext remains until the tear down of the test.

Reviewed By: abhina.sreeskantharajan

Differential Revision: https://reviews.llvm.org/D99004
2021-03-24 10:17:00 -04:00
Anirudh Prasad 9f5da80013 Revert "[AsmParser][SystemZ][z/OS] Reland "Introduce HLASM Comment Syntax""
This reverts commit b605cfb336.

Differential Revision: https://reviews.llvm.org/D98744
2021-03-16 18:39:04 -04:00
Anirudh Prasad b605cfb336 [AsmParser][SystemZ][z/OS] Reland "Introduce HLASM Comment Syntax"
- Previously, https://reviews.llvm.org/D97703 was [[ https://reviews.llvm.org/D98543 | reverted ]] as it broke when building the unit tests when shared libs on.
- This patch reverts the "revert" and makes two minor changes
- The first is it also links in the MCParser lib when building the unittest. This should resolve the issue when building with with shared libs on and off
- The second renames the name of the unit test from `SystemZAsmLexer` to `SystemZAsmLexerTests` since the convention for unittest binaries is to suffix the name of the unit test with "Tests"

Reviewed By: Kai

Differential Revision: https://reviews.llvm.org/D98666
2021-03-16 17:11:46 -04:00
Hubert Tong 4f9cc1512d Revert "[AsmParser][SystemZ][z/OS] Introducing HLASM Comment Syntax"
This reverts commit bcdd40f802.
See https://reviews.llvm.org/D98543.
2021-03-12 14:48:00 -05:00
Anirudh Prasad bcdd40f802 [AsmParser][SystemZ][z/OS] Introducing HLASM Comment Syntax
- This patch adds in support for the ordinary HLASM comment syntax asm
  statements (Reference - Chapter 7, Comment Statements, Ordinary Comment
  Statements)
- In brief, the ordinary comment syntax if used, must begin with the "*"
  character
- To achieve this, this patch makes use of the CommentString attribute
  provided in the base MCAsmInfo class
- In the SystemZMCAsmInfo class, the CommentString attribute was set to
  "*" based on the assembler dialect
- Furthermore, a new attribute RestrictCommentString, is provided to only
  treat a string as a comment if it appears at the start of the asm
  statement. Example: "jo *-4" is valid in HLASM (jump back 4 bytes from
  current point - similar to jo -4 in gnu asm) and we don't want "*-4" to
  be treated as a comment.
- RFC for HLASM Parser support implementation: https://lists.llvm.org/pipermail/llvm-dev/2021-January/147686.html

Reviewed By: scott.linder, Kai

Differential Revision: https://reviews.llvm.org/D97703
2021-03-12 11:56:11 -05:00
Alexander Shaposhnikov 27e11d7120 [MC] Adjust StringTableBuilder for linked Mach-O binaries
LD64 emits string tables which start with a space and a zero byte.
This diff adjusts StringTableBuilder for linked Mach-O binaries to match LD64's behavior.

Test plan: make check-all

Differential revision: https://reviews.llvm.org/D89561
2020-10-22 19:19:41 -07:00
diggerlin 34cfed24eb [AIX][XCOFF] add symbol priority for the llvm-objdump -D -symbol-description
SUMMARY:
when there are two symbol has the same address. llvm-objdump -D -symbol-description will select symbol based on the following rule:

1. using Label first if there is a Label symbol.
2. If there is not Label, using a symbol which has Storage Mapping class.
3. if more than one symbol has storage mapping class, put the TC0 has the low priority, for other storage mapping class , compare based on the value.

Reviewers: James Henderson ,hubert.reinterpretcast,

Differential Revision: https://reviews.llvm.org/D78387
2020-05-29 11:08:51 -04:00
Scott Linder bd12ecb88f [AMDGPU] Fix PC register mapping in wave32 mode
Summary:
The PC_32 DWARF register is for a 32-bit process address space which we
don't implement in AMDGCN; another way of putting this is that the size
of the PC register is not a function of the wavefront size. If we ever
implement a 32-bit process address space we will need to add two more
DwarfFlavours i.e. we will need to represent the product of (wave32,
wave64) x (64-bit address space, 32-bit address space).

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D76732
2020-03-26 14:43:25 -04:00
Fangrui Song 1b9cd51d55 [CMake] Fix AMDGPUTests -DBUILD_SHARED_LIBS=on builds and trim dependencies of AMDGPUTests and AMDDwarfTests after D76357/G24698e526f619271705fe72bcaa928be9bc82484
FAILED: unittests/Target/AMDGPU/AMDGPUTests
...
ld.lld: error: undefined symbol: llvm::MCRegisterInfo::getLLVMRegNum(unsigned int, bool) const
>>> referenced by DwarfRegMappings.cpp:60 (/usr/local/google/home/maskray/llvm/llvm/unittests/Target/AMDGPU/DwarfRegMappings.cpp:60)
>>>               unittests/Target/AMDGPU/CMakeFiles/AMDGPUTests.dir/DwarfRegMappings.cpp.o:(AMDGPUDwarfRegMappingTests_TestWave64DwarfRegMapping_Test::TestBody())
>>> referenced by DwarfRegMappings.cpp:82 (/usr/local/google/home/maskray/llvm/llvm/unittests/Target/AMDGPU/DwarfRegMappings.cpp:82)
>>>               unittests/Target/AMDGPU/CMakeFiles/AMDGPUTests.dir/DwarfRegMappings.cpp.o:(AMDGPUDwarfRegMappingTests_TestWave32DwarfRegMapping_Test::TestBody())

A -DBUILD_SHARED_LIBS=off build is good because AMDGPUCodeGen pulls in MC.
A -DBUILD_SHARED_LIBS=on build requires all direct dependencies (MC) to be listed becuase llvm/cmake/modules/HandleLLVMOptions.cmake uses -Wl,-z,defs
2020-03-23 11:26:42 -07:00
Ram Nalamothu 0ca19efe7b Add AMDGPU MC unittests only when AMDGPU target is being built
Fixes the build failures introduced by 24698e526f
2020-03-23 12:11:07 -04:00
Ram Nalamothu 24698e526f Implement wave32 DWARF register mapping
Implement the DWARF register mapping described in llvm/docs/AMDGPUUsage.rst.

This enables generating appropriate DWARF register numbers for wave64 and
wave32 modes.
2020-03-23 10:24:16 -04:00
Fangrui Song 64a93afc3c [X86][Disassembler] Fix a bug when disassembling an empty string
readPrefixes() assumes insn->bytes is non-empty. The code path is not
exercised in llvm-mc because llvm-mc does not feed empty input to
MCDisassembler::getInstruction().

This bug is uncovered by a5994c789a.
An empty string did not crash before because the deleted regionReader()
allowed UINT64_C(-1) as insn->readerCursor.

  Bytes.size() <= Address -> R->Base
  0 <= UINT64_C(-1) - UINT32_C(-1)
2020-01-13 10:42:21 -08:00
Mirko Brkusanin 4b63ca1379 [Mips] Use appropriate private label prefix based on Mips ABI
MipsMCAsmInfo was using '$' prefix for Mips32 and '.L' for Mips64
regardless of -target-abi option. By passing MCTargetOptions to MCAsmInfo
we can find out Mips ABI and pick appropriate prefix.

Tags: #llvm, #clang, #lldb

Differential Revision: https://reviews.llvm.org/D66795
2019-10-23 12:24:35 +02:00
Jonas Devlieghere bee0f7ddd7 [MC] Fix undefined behavior in MCInstPrinter::formatHex
Passing INT64_MIN to MCInstPrinter::formatHex triggers undefined
behavior because the negation of -9223372036854775808 cannot be
represented in type 'int64_t' (aka 'long long'). This patch puts a
workaround in place to just print the hex value directly.

A possible alternative involves using a small helper functions that uses
(implementation) defined conversions to achieve the desirable value:

  static int64_t helper(int64_t V) {
    auto U = static_cast<uint64_t>(V);
    return V < 0 ? -U : U;
  }

The underlying problem is that MCInstPrinter::formatHex(int64_t) returns
a format_object<int64_t> and should really return a
format_object<uint64_t>. However, that's not possible because formatImm
needs to be able to print both as decimal (where a signed is required)
and hex (where we'd prefer to always have an unsigned).

  format_object<int64_t> formatImm(int64_t Value) const {
    return PrintImmHex ? formatHex(Value) : formatDec(Value);
  }

Differential revision: https://reviews.llvm.org/D67236

llvm-svn: 371159
2019-09-06 01:13:32 +00:00
Jonas Devlieghere 0eaee545ee [llvm] Migrate llvm::make_unique to std::make_unique
Now that we've moved to C++14, we no longer need the llvm::make_unique
implementation from STLExtras.h. This patch is a mechanical replacement
of (hopefully) all the llvm::make_unique instances across the monorepo.

llvm-svn: 369013
2019-08-15 15:54:37 +00:00
Fangrui Song 6a0746a92f Change some StringRef::data() reinterpret_cast to bytes_begin() or arrayRefFromStringRef()
llvm-svn: 357852
2019-04-07 03:58:42 +00:00
Chandler Carruth 2946cd7010 Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00
Wouter van Oortmerssen 8a9cb242fb [WebAssembly] Added default stack-only instruction mode for MC.
Summary:
Made it convert from register to stack based instructions, and removed the registers.
Fixes to related code that was expecting register based instructions.
Added the correct testing flag to all tests, depending on what the
format they were expecting so far.
Translated one test to stack format as example: reg-stackify-stack.ll

tested:
llvm-lit -v `find test -name WebAssembly`
unittests/MC/*

Reviewers: dschuff, sunfish

Subscribers: sbc100, jgravelle-google, eraman, aheejin, llvm-commits, jfb

Differential Revision: https://reviews.llvm.org/D51241

llvm-svn: 340750
2018-08-27 15:45:51 +00:00
Wouter van Oortmerssen a7be375586 Revert "[WebAssembly] Added default stack-only instruction mode for MC."
This reverts commit 917a99b71ce21c975be7bfbf66f4040f965d9f3c.

llvm-svn: 339630
2018-08-13 23:12:49 +00:00
Wouter van Oortmerssen ab26bd0647 [WebAssembly] Added default stack-only instruction mode for MC.
Summary:
Moved Explicit Locals pass to last.
Made that pass obligatory.
Made it convert from register to stack based instructions, and removed the registers.
Fixes to related code that was expecting register based instructions.
Added the correct testing flag to all tests, depending on what the
format they were expecting so far.
Translated one test to stack format as example: reg-stackify-stack.ll

tested:
llvm-lit -v `find test -name WebAssembly`
unittests/MC/*

Reviewers: dschuff, sunfish

Subscribers: jfb, llvm-commits, aheejin, eraman, jgravelle-google, sbc100

Differential Revision: https://reviews.llvm.org/D50568

llvm-svn: 339474
2018-08-10 21:32:47 +00:00
Wouter van Oortmerssen a90d24da1c Revert "[WebAssembly] Added default stack-only instruction mode for MC."
This reverts commit d3c9af4179eae7793d1487d652e2d4e23844555f.
(SVN revision 338164)

llvm-svn: 338176
2018-07-27 23:19:51 +00:00
Wouter van Oortmerssen a67c4137c3 [WebAssembly] Added default stack-only instruction mode for MC.
Summary:
Moved Explicit Locals pass to last.
Made that pass obligatory.
Made it convert from register to stack based instructions, and removed the registers.
Fixes to related code that was expecting register based instructions.
Added the correct testing flag to all tests, depending on what the
format they were expecting so far.
Translated one test to stack format as example: reg-stackify-stack.ll

tested:
llvm-lit -v `find test -name WebAssembly`
unittests/MC/*

Reviewers: dschuff, sunfish

Subscribers: sbc100, jgravelle-google, eraman, aheejin, llvm-commits

Differential Revision: https://reviews.llvm.org/D49160

llvm-svn: 338164
2018-07-27 20:56:43 +00:00
Sam Clegg cf2a9e28b1 [WebAssembly] Remove ELF file support.
This support was partial and temporary.  Now that we have
wasm object file support its no longer needed.

Differential Revision: https://reviews.llvm.org/D48744

llvm-svn: 337222
2018-07-16 23:09:29 +00:00
Derek Schuff cf3a986087 [WebAssembly] Fixed disassembler unit test failure.
Summary: A recent commit forgot to update the unit tests.

Differential Revision: https://reviews.llvm.org/D48304

Patch by Wouter Van Oortmerssen

llvm-svn: 334999
2018-06-19 00:02:34 +00:00
Sam Clegg 16c16827bc [WebAssembly] Initial Disassembler.
This implements a new table-gen emitter to create tables for
a wasm disassembler, and a dissassembler to use them.

Comes with 2 tests, that tests a few instructions manually. Is also able to
disassemble large .wasm files with objdump reasonably.

Not working so well, to be addressed in followups:
- objdump appears to be passing an incorrect starting point.
- since the disassembler works an instruction at a time, and it is
  disassembling stack instruction, it has no idea of pseudo register assignments.
  These registers are required for the instruction printing code that follows.
  For now, all such registers appear in the output as $0.

Patch by Wouter van Oortmerssen

Differential Revision: https://reviews.llvm.org/D45848

llvm-svn: 332052
2018-05-10 22:16:44 +00:00
Zachary Turner 264b5d9e88 Move Object format code to lib/BinaryFormat.
This creates a new library called BinaryFormat that has all of
the headers from llvm/Support containing structure and layout
definitions for various types of binary formats like dwarf, coff,
elf, etc as well as the code for identifying a file from its
magic.

Differential Revision: https://reviews.llvm.org/D33843

llvm-svn: 304864
2017-06-07 03:48:56 +00:00
Chandler Carruth 9a67b07398 Re-sort #include lines for unittests. This uses a slightly modified
clang-format (https://reviews.llvm.org/D33932) to keep primary headers
at the top and handle new utility headers like 'gmock' consistently with
other utility headers.

No other change was made. I did no manual edits, all of this is
clang-format.

This should allow other changes to have more clear and focused diffs,
and is especially motivated by moving some headers into more focused
libraries.

llvm-svn: 304786
2017-06-06 11:06:56 +00:00
Mehdi Amini 3ccc39ef7c Fix static initialization order fiasco in MCTests
Reported by Kostya on llvm-dev, uncovered by an ASAN bot

llvm-svn: 286647
2016-11-11 22:18:42 +00:00
Justin Lebar ee34a7343d [ADT] Move CachedHashString to its own header in ADT, and rename to CachedHashStringRef.
Summary:
Reclaiming the name 'CachedHashString' will let us add a type with that
name that owns its value.

Reviewers: timshen

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D25644

llvm-svn: 284434
2016-10-17 22:24:36 +00:00
Rafael Espindola 39751afc4e Misc improvements to StringTableBuilder.
This patch adds write methods to StringTableBuilder so that it is
easier to change the underlying implementation.

Using the write methods, avoid creating a temporary buffer when using
mmaped output.

It also uses a more compact key in the DenseMap. Overall this produces
a slightly faster lld:

firefox
  master 6.853419709
  patch  6.841968912 1.00167361138x faster
chromium
  master 4.297280174
  patch  4.298712163 1.00033323147x slower
chromium fast
  master 1.802335952
  patch  1.806872459 1.00251701521x slower
the gold plugin
  master 0.3247149
  patch  0.321971644 1.00852017888x faster
clang
  master 0.551279945
  patch  0.543733194 1.01387951128x faster
llvm-as
  master 0.032743458
  patch  0.032143478 1.01866568391x faster
the gold plugin fsds
  master 0.350814247
  patch  0.348571741 1.00643341309x faster
clang fsds
  master 0.6281672
  patch  0.621130222 1.01132931187x faster
llvm-as fsds
  master 0.030168899
  patch  0.029797155 1.01247582194x faster
scylla
  master 3.104222518
  patch  3.059590248 1.01458766252x faster

llvm-svn: 283266
2016-10-04 22:43:25 +00:00
Rafael Espindola ebd9193b57 Move ObjectYAML code to a new library.
It is only ever used by obj2yaml and yaml2obj. No point in linking it
everywhere.

llvm-svn: 262368
2016-03-01 19:15:06 +00:00
Reid Kleckner 17495274fd [unittests] Move TargetRegistry test from Support to MC
This removes the dependency from SupportTests to all of the LLVM
backends, and makes it link faster.

llvm-svn: 259705
2016-02-03 21:41:24 +00:00
Frederic Riss e5b78d8041 [MCDwarf] Fix encoding of line tables with weird custom parameters
With poorly chosen custom parameters, the line table encoding logic would
sometimes end up generating a special opcode bigger than 255, which is wrong.
The set of default parameters that LLVM uses isn't subject to this bug.

When carefully chosing the line table parameters, it's impossible to fall into the
corner case that this patch fixes. The standard however doesn't require that these
parameters be carefully chosen. And even if it did, we shouldn't generate broken
encoding.

Add a unittest for this specific encoding bug, and while at it, create some unit
tests for the encoding logic using different sets of parameters.

llvm-svn: 259334
2016-01-31 22:06:35 +00:00
Reid Kleckner 2214ed8937 Reland "[CodeView] Use assembler directives for line tables"
This reverts commit r259126 and relands r259117.

This time with updated library dependencies.

llvm-svn: 259130
2016-01-29 00:49:42 +00:00
Reid Kleckner 00d9639c24 Revert "[CodeView] Use assembler directives for line tables"
This reverts commit r259117.

The LineInfo constructor is defined in the codeview library and we have
to link against it now. Doing that isn't trivial, so reverting for now.

llvm-svn: 259126
2016-01-29 00:13:28 +00:00
Reid Kleckner c62e379d22 [CodeView] Use assembler directives for line tables
Adds a new family of .cv_* directives to LLVM's variant of GAS syntax:

- .cv_file: Similar to DWARF .file directives

- .cv_loc: Similar to the DWARF .loc directive, but starts with a
  function id. CodeView line tables are emitted by function instead of
  by compilation unit, so we needed an extra field to communicate this.
  Rather than overloading the .loc direction further, we decided it was
  better to have our own directive.

- .cv_stringtable: Emits the codeview string table at the current
  position. Currently this just contains the filenames as
  null-terminated strings.

- .cv_filechecksums: Emits the file checksum table for all files used
  with .cv_file so far. There is currently no support for emitting
  actual checksums, just filenames.

This moves the line table emission code down into the assembler.  This
is in preparation for implementing the inlined call site line table
format. The inline line table format encoding algorithm requires knowing
the absolute code offsets, so it must run after the assembler has laid
out the code.

David Majnemer collaborated on this patch.

llvm-svn: 259117
2016-01-28 23:31:52 +00:00
Chris Bieneman e49730d4ba Remove autoconf support
Summary:
This patch is provided in preparation for removing autoconf on 1/26. The proposal to remove autoconf on 1/26 was discussed on the llvm-dev thread here: http://lists.llvm.org/pipermail/llvm-dev/2016-January/093875.html

"I felt a great disturbance in the [build system], as if millions of [makefiles] suddenly cried out in terror and were suddenly silenced. I fear something [amazing] has happened."
- Obi Wan Kenobi

Reviewers: chandlerc, grosbach, bob.wilson, tstellarAMD, echristo, whitequark

Subscribers: chfast, simoncook, emaste, jholewinski, tberghammer, jfb, danalbert, srhines, arsenm, dschuff, jyknight, dsanders, joker.eph, llvm-commits

Differential Revision: http://reviews.llvm.org/D16471

llvm-svn: 258861
2016-01-26 21:29:08 +00:00
Rafael Espindola 21956e4007 Add a RAW mode to StringTableBuilder.
In this mode it just tries to tail merge the strings without imposing any other
format constrains. It will not, for example, add a null byte between them.

Also add support for keeping a tentative size and offset if we decide to
not optimize after all.

This will be used shortly in lld for merging SHF_STRINGS sections.

llvm-svn: 251153
2015-10-23 21:48:05 +00:00
Chandler Carruth d9903888d9 [cleanup] Re-sort all the #include lines in LLVM using
utils/sort_includes.py.

I clearly haven't done this in a while, so more changed than usual. This
even uncovered a missing include from the InstrProf library that I've
added. No functionality changed here, just mechanical cleanup of the
include order.

llvm-svn: 225974
2015-01-14 11:23:27 +00:00
Colin LeMahieu d17bce2e9f Cleaning out google tests from MC.
llvm-svn: 222770
2014-11-25 18:03:08 +00:00
Benjamin Kramer 5d363ead09 Dispose disassembler after use in unit test.
llvm-svn: 222083
2014-11-15 10:53:12 +00:00