This pattern is matched in foldICmpBinOpEqualityWithConstant() and already works
with vectors too. I changed some comments over there to point out the current 
location. The tests for this transform are currently in 'sub.ll'.

Note that the remaining folds in this block all require a sub too, so they should
get grouped with the other icmp(sub) patterns.

llvm-svn: 281627

llvm-svn: 281624

llvm-svn: 281623

llvm-svn: 281621

Summary: The return value of `maybeInsertAsanInitAtFunctionEntry` is ignored.

Reviewers: rnk

Subscribers: llvm-commits, chrisha, dberris

Differential Revision: https://reviews.llvm.org/D24568

llvm-svn: 281620

Asan bots are currently broken without this patch.

llvm-svn: 281618

using startswith instead of find.

llvm-svn: 281617

llvm-svn: 281616

1. Early exit to reduce indent
2. Rename variables
3. Add local 'Pred' variable

llvm-svn: 281615

This is a big glob of transforms that probably should work for vectors,
but currently they are disallowed because of ConstantInt guards.

llvm-svn: 281614

llvm-svn: 281613

Unfortunately we can't enable it for all N64 because it is not yet possible to
distinguish N32 from N64.

N64 has been confirmed to produce identical (within reason) objects to GAS
during stage 2 of compiler recursion on N64-abit Fedora. Unfortunately,
Fedora's triples do not distinguish N32 from N64 so I can't enable it by
default there. I'm currently repeating this testing for Debian mips64el but
it's very unlikely to produce a different result.

Patch by: Daniel Sanders

Reviewers: sdardis

Differential Review: https://reviews.llvm.org/D22678

llvm-svn: 281607

If a constant is unamed_addr and is only used within one function, we can save
on the code size and runtime cost of an indirection by changing the global's storage
to inside the constant pool. For example, instead of:

      ldr r0, .CPI0
      bl printf
      bx lr
    .CPI0: &format_string
    format_string: .asciz "hello, world!\n"

We can emit:

      adr r0, .CPI0
      bl printf
      bx lr
    .CPI0: .asciz "hello, world!\n"

This can cause significant code size savings when many small strings are used in one
function (4 bytes per string).

This recommit contains fixes for a nasty bug related to fast-isel fallback - because
fast-isel doesn't know about this optimization, if it runs and emits references to
a string that we inline (because fast-isel fell back to SDAG) we will end up
with an inlined string and also an out-of-line string, and we won't emit the
out-of-line string, causing backend failures.

llvm-svn: 281604

llvm-svn: 281602

llvm-svn: 281600

It was only really there as a sentinel when instructions had to have precisely
one type. Now that registers are typed, each register really has to have a type
that is sized.

llvm-svn: 281599

llvm-svn: 281598

Otherwise everything that needs to work out what size they are has to keep a
DataLayout handy, which is a bit silly and very annoying.

llvm-svn: 281597

llvm-svn: 281590

Copying in the full text of the function doesn't help at all when we
already know that it's never executed. Just say that it's unexecuted --
the relevant source text has already been printed.

llvm-svn: 281589

Doing so is pointless, since the whole view is usually visible in a
small amount of space.

llvm-svn: 281588

The patch is to partially fix PR10584. Correlated Value Propagation queries LVI
to check non-null for pointer params of each callsite. If we know the def of
param is an alloca instruction, we know it is non-null and can return early from
LVI. Similarly, CVP queries LVI to check whether pointer for each mem access is
constant. If the def of the pointer is an alloca instruction, we know it is not
a constant pointer. These shortcuts can reduce the cost of CVP significantly.

Differential Revision: https://reviews.llvm.org/D18066

llvm-svn: 281586

Copy variable LLVM_BUILD_MAIN_SRC_DIR from LLVMConfig.cmake to
LLVM_MAIN_SRC_DIR as it is named for in-tree builds. This ensures that
add_lit_target() can reliably find llvm-lit which is not necessarily
in the PATH.

Differential Revision: https://reviews.llvm.org/D24503

llvm-svn: 281585

llvm-svn: 281584

llvm-svn: 281583

llvm-svn: 281581

llvm-svn: 281580

Having the same title, timestamp, etc. occur repeatedly creates an
unnecessary distraction when paging through a report.

llvm-svn: 281579

E.g the 'showProjectSummary' test contains some checks which can't fail
because they match themselves...

llvm-svn: 281578

[libFuzzer] implement print_pcs with trace-pc-guard. Change the trace-pc-guard heuristic for 8-bit counters to look more like in AFL (not that it's provable better, but the existin test preferes this heuristic)

llvm-svn: 281577

The test exercises the branch in scev expansion when the value in ValueOffsetPair
is a ptr and the offset is not divisible by the elem type size of value.

Differential Revision: https://reviews.llvm.org/D24088

llvm-svn: 281575

[doc] [CUDA] Add sections about STL support and differences between nvcc and clang to CompileCudaWithLLVM.rst.

llvm-svn: 281573

llvm-svn: 281570

llvm-svn: 281568

The pattern matching and transforms are identical; the cmp predicate just changes.

llvm-svn: 281561

llvm-svn: 281560

llvm-svn: 281559

The `CVType` had two redundant fields which were confusing and
error-prone to fill out.  By treating member records as a distinct
type from leaf records, we are able to simplify this quite a bit.

Reviewed By: rnk
Differential Revision: https://reviews.llvm.org/D24432

llvm-svn: 281556

This completes being able to write all the interesting
values of a PDB TPI stream.

Reviewed By: rnk
Differential Revision: https://reviews.llvm.org/D24370

llvm-svn: 281555

Summary:
This fixes a dumpbin warning on objects produced by the MC assembler
when starting from text. All .debug$S sections are supposed to be marked
IMAGE_SCN_MEM_DISCARDABLE. The main, non-COMDAT .debug$S section had
this set, but any comdat ones were not being marked discardable because
there was no .section flag for it.

This change does two things:

- If the section name starts with .debug, implicitly mark the section as
  discardable. This means we do the same thing as gas on .s files with
  DWARF from GCC, which is important.

- Adds the 'D' flag to the .section directive on COFF to explicitly say
  a section is discardable. We only emit this flag if the section name
  does not start with .debug. This allows the user to explicitly tweak
  their section flags without worrying about magic section names.

The only thing you can't do in this scheme is to create a
non-discardable section with a name starting with ".debug", but
hopefully users don't need that.

Reviewers: majnemer, rafael

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D24582

llvm-svn: 281554