[SCEV] Consolidate comments; NFC

Consolidate documentation by removing comments from the .cpp file where
the comments in the .cpp file were copy-pasted from the header.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271157 91177308-0d34-0410-b5e6-96231b3b80d8

[SCEV] Rename functions to LLVM style; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271156 91177308-0d34-0410-b5e6-96231b3b80d8

[SCEV] Remove unused function; NFC

Moreover, I've never seen globally scoped `static inline` functions
elsewhere in LLVM, so this pattern is unusual if not unidiomatic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271155 91177308-0d34-0410-b5e6-96231b3b80d8

[SCEV] Comment and whitesapce changes in header

 - Use doxygen-style comments
 - Don't repeat member names in comments
 - Add newlines between declarations

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271154 91177308-0d34-0410-b5e6-96231b3b80d8

[IndVars] Eliminate op.with.overflow when possible (re-apply)

Summary:
If we can prove that an op.with.overflow intrinsic does not overflow, we
can get rid of the intrinsic, and replace it with non-wrapping
arithmetic.

This was first checked in at r265913 but reverted in r265950 because it
exposed some issues around how SCEV handled post-inc add recurrences.
Those issues have now been fixed.

Reviewers: atrick, regehr

Subscribers: sanjoy, mcrosier, llvm-commits

Differential Revision: http://reviews.llvm.org/D18685

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271153 91177308-0d34-0410-b5e6-96231b3b80d8

[SCEV] See through op.with.overflow intrinsics (re-apply)

Summary:
This change teaches SCEV to see reduce `(extractvalue
0 (op.with.overflow X Y))` into `op X Y` (with a no-wrap tag if
possible).

This was first checked in at r265912 but reverted in r265950 because it
exposed some issues around how SCEV handled post-inc add recurrences.
Those issues have now been fixed.

Reviewers: atrick, regehr

Subscribers: mcrosier, mzolotukhin, llvm-commits

Differential Revision: http://reviews.llvm.org/D18684

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271152 91177308-0d34-0410-b5e6-96231b3b80d8

[SCEV] Don't always add no-wrap flags to post-inc add recs

Fixes PR27315.

The post-inc version of an add recurrence needs to "follow the same
rules" as a normal add or subtract expression.  Otherwise we miscompile
programs like

```
int main() {
  int a = 0;
  unsigned a_u = 0;
  volatile long last_value;
  do {
    a_u += 3;
    last_value = (long) ((int) a_u);
    if (will_add_overflow(a, 3)) {
      // Leave, and don't actually do the increment, so no UB.
      printf("last_value = %ld\n", last_value);
      exit(0);
    }
    a += 3;
  } while (a != 46);
  return 0;
}
```

This patch changes SCEV to put no-wrap flags on post-inc add recurrences
only when the poison from a potential overflow will go ahead to cause
undefined behavior.

To avoid regressing performance too much, I've assumed infinite loops
without side effects is undefined behavior to prove poison<->UB
equivalence in more cases.  This isn't ideal, but is not new to LLVM as
a whole, and far better than the situation I'm trying to fix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271151 91177308-0d34-0410-b5e6-96231b3b80d8

[ValueTracking] ICmp instructions propagate poison

This is a stripped down version of D19211, leaving out the questionable
"branching in poison is UB" bit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271150 91177308-0d34-0410-b5e6-96231b3b80d8

[PM] SCCP should preserve GlobalsAA even if the IR is mutated.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271149 91177308-0d34-0410-b5e6-96231b3b80d8

[COFFDumper] Validate that the next offset is not too large

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271147 91177308-0d34-0410-b5e6-96231b3b80d8

[COFFDumper] Make sure there is sufficient padding left in the string table

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271146 91177308-0d34-0410-b5e6-96231b3b80d8

[SymbolDumper] Validate the string table offset before using it

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271145 91177308-0d34-0410-b5e6-96231b3b80d8

[COFFDumper] Make sure there is sufficient padding left in the checksum

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271143 91177308-0d34-0410-b5e6-96231b3b80d8

[SymbolDumper] Validate the string table offset before using it

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271142 91177308-0d34-0410-b5e6-96231b3b80d8

[CVSymbolVisitor] It's possible for an error to occur in begin()

If the begin iterator fails, we cannot dereference it's contents.
Instead, we must immediately stop processing symbols.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271141 91177308-0d34-0410-b5e6-96231b3b80d8

[Object] Return an error code instead of asserting

This makes it easier to report errors up the stack.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271140 91177308-0d34-0410-b5e6-96231b3b80d8

[llvm-readobj] Validate the string table offset before using it

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271139 91177308-0d34-0410-b5e6-96231b3b80d8

Use consume instead of manually using drop_front

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271137 91177308-0d34-0410-b5e6-96231b3b80d8

Update test to deal with non-zero exit codes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271135 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-pdbdump should have a non-zero exit code on error

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271132 91177308-0d34-0410-b5e6-96231b3b80d8

[X86][SSE] (Reapplied) Replace (V)PMOVSX and (V)PMOVZX integer extension intrinsics with generic IR (llvm)

This patch removes the llvm intrinsics VPMOVSX and (V)PMOVZX sign/zero extension intrinsics and auto-upgrades to SEXT/ZEXT calls instead. We already did this for SSE41 PMOVSX sometime ago so much of that implementation can be reused.

Reapplied now that the the companion patch (D20684) removes/auto-upgrade the clang intrinsics has been committed.

Differential Revision: http://reviews.llvm.org/D20686

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271131 91177308-0d34-0410-b5e6-96231b3b80d8

Tighten some of the name map checks further

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271130 91177308-0d34-0410-b5e6-96231b3b80d8

ValueMapper: fix assertion when null-mapping a constant for linking metadata

Summary:
When RF_NullMapMissingGlobalValues is set, mapValue can return null
for GlobalValue. When mapping the operands of a constant that is
referenced from metadata, we need to handle this case and actually
return null instead of mapping this constant.

Reviewers: dexonsmith, rafael

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D20713

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271129 91177308-0d34-0410-b5e6-96231b3b80d8

[InstCombine] add tests to show bitcast interference

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271125 91177308-0d34-0410-b5e6-96231b3b80d8

Fix production of R_X86_64_GOTPCRELX/R_X86_64_REX_GOTPCRELX.

We were producing R_X86_64_GOTPCRELX for invalid instructions and
sometimes producing R_X86_64_GOTPCRELX instead of
R_X86_64_REX_GOTPCRELX.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271118 91177308-0d34-0410-b5e6-96231b3b80d8

regenerate checks

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271117 91177308-0d34-0410-b5e6-96231b3b80d8

join RUN lines; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271115 91177308-0d34-0410-b5e6-96231b3b80d8

[x86] avoid printing unnecessary sign bits of hex immediates in asm comments (PR20347)

It would be better to check the valid/expected size of the immediate operand, but this is
generally better than what we print right now.

Differential Revision: http://reviews.llvm.org/D20385

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271114 91177308-0d34-0410-b5e6-96231b3b80d8

[X86] Try to zero elts when lowering 256-bit shuffle with PSHUFB.

Otherwise we fallback to a blend of PSHUFBs later on.

Differential Revision: http://reviews.llvm.org/D19661

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271113 91177308-0d34-0410-b5e6-96231b3b80d8

Simplify and clang-format a table.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271112 91177308-0d34-0410-b5e6-96231b3b80d8

Fix default reloc model on ARM.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271111 91177308-0d34-0410-b5e6-96231b3b80d8

[MC] Return early when .fill size is negative

Rather than invoking emitFill with negative size, which may trigger
an undefined behavior, return immediately after emitting the warning.

Differential Revision: http://reviews.llvm.org/D20768

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271107 91177308-0d34-0410-b5e6-96231b3b80d8

Bounds check the number of bitmap blocks in the name map

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271105 91177308-0d34-0410-b5e6-96231b3b80d8

An empty record cannot be null-terminated

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271104 91177308-0d34-0410-b5e6-96231b3b80d8

Make sure the directory contains info for all streams

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271103 91177308-0d34-0410-b5e6-96231b3b80d8

[MC] Support symbolic expressions in assembly directives

This matches the behavior of GNU assembler which supports symbolic
expressions in absolute expressions used in assembly directives.

Differential Revision: http://reviews.llvm.org/D20752

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271102 91177308-0d34-0410-b5e6-96231b3b80d8

[pdb] Finish conversion to zero copy pdb access.

This converts remaining uses of ByteStream, which was still
left in the symbol stream and type stream, to using the new
StreamInterface zero-copy classes.

RecordIterator is finally deleted, so this is the only way left
now.  Additionally, more error checking is added when iterating
the various streams.

With this, the transition to zero copy pdb access is complete.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271101 91177308-0d34-0410-b5e6-96231b3b80d8

Revert "Revert "Map DynamicNoPIC to Static on non-darwin.""

This reverts commit r271096, as reverting it broke even more buildbots!

But that also means I'll break on ARM again... :(

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271099 91177308-0d34-0410-b5e6-96231b3b80d8

Add a comment about why we need to buffer the attribute changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271097 91177308-0d34-0410-b5e6-96231b3b80d8

Revert "Map DynamicNoPIC to Static on non-darwin."

This reverts commit r271052, as it broke some ARM buildbots.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271096 91177308-0d34-0410-b5e6-96231b3b80d8

[libFuzzer] fix a failure that occurs when running individual inputs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271095 91177308-0d34-0410-b5e6-96231b3b80d8

Small cleanup.

Centralize assertion.
Clean up max loop.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271094 91177308-0d34-0410-b5e6-96231b3b80d8

Inline this into its only use. NFC.

The name was out of date at this point and it seems simple enough to
have in-line.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271093 91177308-0d34-0410-b5e6-96231b3b80d8

Bring back r271090 in a way that doesn't depend on r271089.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271092 91177308-0d34-0410-b5e6-96231b3b80d8

Revert r271089 and r271090.

It was triggering an msan bot.

Revert "[IRPGO] Set the function entry count metadata."

This reverts commit r271090.

Revert "[IRPGO] Centralize the function attribute inliner hint logic. NFC."

This reverts commit r271089.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271091 91177308-0d34-0410-b5e6-96231b3b80d8

[IRPGO] Set the function entry count metadata.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271090 91177308-0d34-0410-b5e6-96231b3b80d8

[IRPGO] Centralize the function attribute inliner hint logic. NFC.

This keeps the logic in the same function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271089 91177308-0d34-0410-b5e6-96231b3b80d8

[Hexagon] Add option to enable subregister liveness tracking

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271088 91177308-0d34-0410-b5e6-96231b3b80d8

[Hexagon] Separate C8 and USR to avoid unwanted subregister composition

Composing subreg_loreg with subreg_oveflow leads to strange results with
lane masks for register classes with subreg_loreg. In particular, dead
lane detection generates incorrect code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271087 91177308-0d34-0410-b5e6-96231b3b80d8

[LoopUnrollAnalyzer] Add a comment to visitCastInst.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271086 91177308-0d34-0410-b5e6-96231b3b80d8

AArch64: Fix indentation

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271084 91177308-0d34-0410-b5e6-96231b3b80d8

[docs] Be a bit more precise.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271083 91177308-0d34-0410-b5e6-96231b3b80d8

AMDGPU: Cleanup vector insert/extract tests

This mostly makes sure that 3-vector dynamic inserts
and extracts are covered.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271082 91177308-0d34-0410-b5e6-96231b3b80d8

AMDGPU: Fix trailing whitespace

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271081 91177308-0d34-0410-b5e6-96231b3b80d8

AMDGPU: Add fract intrinsic

Remove broken patterns matching it. This was matching the
unsafe math pattern and expanding the fix for the buggy instruction
from the pattern. The problems are also on CI. Remove the workarounds
and only use fract with unsafe math or from the intrinsic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271078 91177308-0d34-0410-b5e6-96231b3b80d8

The patch fixes r271071
Summary:
unused variables in Release mode:
  BasicBlock *Header
  unsigned OrigCount
put under DEBUG

From: Evgeny Stupachenko <evstupac@gmail.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271076 91177308-0d34-0410-b5e6-96231b3b80d8

Fix windows build bot failure

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271075 91177308-0d34-0410-b5e6-96231b3b80d8

[PM] Port the Sample FDO to new PM (part-2)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271072 91177308-0d34-0410-b5e6-96231b3b80d8

The patch refactors unroll pass.
Summary:
Unroll factor (Count) calculations moved to a new function.
Early exits on pragma and "-unroll-count" defined factor added.
New type of unrolling "Force" introduced (previously used implicitly).
New unroll preference "AllowRemainder" introduced and set "true" by default.
(should be set to false for architectures that suffers from it).

Reviewers: hfinkel, mzolotukhin, zzheng

Differential Revision: http://reviews.llvm.org/D19553

From: Evgeny Stupachenko <evstupac@gmail.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271071 91177308-0d34-0410-b5e6-96231b3b80d8

Use C++ casts to avoid a warning

warning: cast from type ‘const void*’ to type
‘llvm::PrettyStackTraceEntry*’ casts away qualifiers [-Wcast-qual]
   PrettyStackTraceHead = (PrettyStackTraceEntry*)Top;

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271069 91177308-0d34-0410-b5e6-96231b3b80d8

Update the stack coloring pass to remove lifetime intrinsics in the optnone/opt-bisect skip case.

Differential Revision: http://reviews.llvm.org/D20453

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271068 91177308-0d34-0410-b5e6-96231b3b80d8

[asan] Add option to enable asan-use-after-scope from clang.

Clang will have -fsanitize-address-use-after-scope flag.

PR27453

Reviewers: kcc, eugenis, aizatsky

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D20750

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271067 91177308-0d34-0410-b5e6-96231b3b80d8

Start using shouldAssumeDSOLocal on ARM.

Given where this is used it should be a nop.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271066 91177308-0d34-0410-b5e6-96231b3b80d8

[Kaleidoscope][BuildingAJIT] Add stub chapter text for Building A JIT Chapter 4.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271064 91177308-0d34-0410-b5e6-96231b3b80d8

[PM] Port the Sample FDO to new PM (part-1)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271062 91177308-0d34-0410-b5e6-96231b3b80d8

[Kaleidoscope][Orc] Remove the reference to the Orc directory that was removed
in r271059.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271061 91177308-0d34-0410-b5e6-96231b3b80d8

[Kaleidoscope] Remove the old Kaleidoscope/ORC tutorial series.

This code has been superseded by the new Building A JIT series.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271059 91177308-0d34-0410-b5e6-96231b3b80d8

MachineScheduler: Introduce ONLY1 reason to improve debug output

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271058 91177308-0d34-0410-b5e6-96231b3b80d8

AArch64Subtarget: Use default member initializers

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271057 91177308-0d34-0410-b5e6-96231b3b80d8

Don't discard errors

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271056 91177308-0d34-0410-b5e6-96231b3b80d8

[Kaleidoscope][BuildingAJIT] Add code for chapter 4.

This chapter will cover lazy compilation directly from ASTs using the Compile
Callbacks and Indirect Stubs APIs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271054 91177308-0d34-0410-b5e6-96231b3b80d8

[libFuzzer] use __sanitizer_set_report_fd with -close_fd_mask. This allows us to keep asan reports when closing target's stderr

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271053 91177308-0d34-0410-b5e6-96231b3b80d8

Map DynamicNoPIC to Static on non-darwin.

DynamicNoPIC was only every used on darwin. This maps it to static on
ELF. It matches what is done on X86.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271052 91177308-0d34-0410-b5e6-96231b3b80d8

[InstCombine] move and/sext fold to helper function; NFCI

We need to enhance the pattern matching on these to look through bitcasts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271051 91177308-0d34-0410-b5e6-96231b3b80d8

Don't iterate endlessly if an error occurs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271048 91177308-0d34-0410-b5e6-96231b3b80d8

FileCheck: dump command line context with empty input

Differential Revision: http://reviews.llvm.org/D20716

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271047 91177308-0d34-0410-b5e6-96231b3b80d8

[Hexagon] Use standard macros to initialize HexagonExpandCondsets pass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271045 91177308-0d34-0410-b5e6-96231b3b80d8

Fix compilation with GCC, which treats this as a constructor name not a type
name. (GCC is correct here per the latest language DRs.)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271044 91177308-0d34-0410-b5e6-96231b3b80d8

[Hexagon] Do not create passes in the constructor of HexagonPassConfig

When running mir tests, a pass created in that constructor would not be
freed, leading to memory leaks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271043 91177308-0d34-0410-b5e6-96231b3b80d8

[LCSSA] Simplify. Suggested by Sanjoy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271041 91177308-0d34-0410-b5e6-96231b3b80d8

[pdb] Fix size check when reading stream bytes.

We were accidentally bounds checking the read against the output
ArrayRef instead of against the size of the read.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271040 91177308-0d34-0410-b5e6-96231b3b80d8

[Timer] Add missing slash in doxygen commit.

Pointed out by: Sean Silva.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271039 91177308-0d34-0410-b5e6-96231b3b80d8

Revert "[MC] Support symbolic expressions in assembly directives"

This reverts commit r271028, it causes the directive_fill.s to fail.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271038 91177308-0d34-0410-b5e6-96231b3b80d8

[Timer] Expose an API to check if the timer is running.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271037 91177308-0d34-0410-b5e6-96231b3b80d8

SmallVector: Replace some pre-C++11 move helpers with standard algorithms

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271036 91177308-0d34-0410-b5e6-96231b3b80d8

[GVN] Preserve !range metadata when PRE'ing loads

Reviewers: dberlin, reames, george.burgess.iv

Subscribers: mcrosier, llvm-commits

Differential Revision: http://reviews.llvm.org/D20743

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271034 91177308-0d34-0410-b5e6-96231b3b80d8

[X86] Detect SAD patterns and emit psadbw instructions.

This recommits r267649 with a fix for PR27539.

Differential Revision: http://reviews.llvm.org/D20598

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271033 91177308-0d34-0410-b5e6-96231b3b80d8

Make sure data is available before dereferencing it

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271032 91177308-0d34-0410-b5e6-96231b3b80d8

Avoid overflow when computing the size of an array

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271031 91177308-0d34-0410-b5e6-96231b3b80d8

Don't assume that there will be enough padding bytes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271030 91177308-0d34-0410-b5e6-96231b3b80d8

Don't assume that there will be another null byte

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271029 91177308-0d34-0410-b5e6-96231b3b80d8

[MC] Support symbolic expressions in assembly directives

This matches the behavior of GNU assembler which supports symbolic
expressions in absolute expressions used in assembly directives.

Differential Revision: http://reviews.llvm.org/D20656

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271028 91177308-0d34-0410-b5e6-96231b3b80d8

Resubmit "[pdb] Allow zero-copy read support for symbol streams.""

Due to differences in template instantiation rules, it is not
portable to static_assert(false) inside of an invalid specialization
of a template.  Instead I just =delete the method so that it can't
be used, and leave a comment that it must be explicitly specialized.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271027 91177308-0d34-0410-b5e6-96231b3b80d8

Revert "[pdb] Allow zero-copy read support for symbol streams."

This reverts commit r271024 due to error: static_assert failed
"You must either provide a specialization of VarStreamArrayExtractor
or a custom extractor"

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271026 91177308-0d34-0410-b5e6-96231b3b80d8

[pdb] Allow zero-copy read support for symbol streams.

This reduces the amount of memory used by llvm-pdbdump by roughly
1/3 of the size of the PDB file.

Differential Revision: http://reviews.llvm.org/D20724
Reviewed By: ruiu

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271025 91177308-0d34-0410-b5e6-96231b3b80d8

[X86] Clarify PSHUFB+blend lowering function name. NFC.

Also guard against v32i8 users.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271024 91177308-0d34-0410-b5e6-96231b3b80d8

[ARM] Remove tBLXr Pat made redundant by r269101. NFCI.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271023 91177308-0d34-0410-b5e6-96231b3b80d8

[ProfData] Remove global constructor from ProfileSummaryBuilder.

No functionality change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271021 91177308-0d34-0410-b5e6-96231b3b80d8

Don't generate unnecessary signed ConstantRange during multiply.  NFC

r231483 taught ConstantRange::multiply to be clever about signed vs unsigned ranges. For example, an unsigned range could be full-set while the signed range is more specific than that.

In looking at the allocations trace for LTO'ing verify-uselistorder (see r236629 for details), millions of allocations are from APInt, many of which come from ConstantRange's.

This change tries to avoid some (3.2 million) allocations by returning the unsigned range if its suitable. The checks here are that it should not be a wrapping range, and should be positive. That should be enough to check for ranges such as [1, 10) which the signed range will be equal to, if we were to calculate it.

Differential Revision: http://reviews.llvm.org/D20723

Reviewed by James Molloy

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271020 91177308-0d34-0410-b5e6-96231b3b80d8

Move test to X86 directory: I think it depends on X86 TTI.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271019 91177308-0d34-0410-b5e6-96231b3b80d8