This change permits there to be more than one thunk to be associated with
a symbol. For interworking thunks we only require one thunk, but range
extension thunks may require more than one.

Differential Revision: https://reviews.llvm.org/D34037

llvm-svn: 307136

This patch seems to cause failures of test MathExtras.SaturatingMultiply on
multiple buildbots. Reverting until the reason of that is clarified.

Differential Revision: https://reviews.llvm.org/rL307126

llvm-svn: 307135

Fixes https://bugs.llvm.org/show_bug.cgi?id=33574

Differential Revision: https://reviews.llvm.org/D34882

llvm-svn: 307134

Summary:
This further improves the compile-time regressions that will be caused by a
re-commit of r303259.

Also added included preliminary work in preparation for the multi-insn emitter
since I needed to change the relevant part of the API for this patch anyway.

Depends on D33758

Reviewers: rovka, vitalybuka, ab, t.p.northover, qcolombet, aditya_nandakumar

Reviewed By: ab

Subscribers: kristof.beyls, igorb, llvm-commits

Differential Revision: https://reviews.llvm.org/D33764

llvm-svn: 307133

On ARM the interworking thunks are only produced for branch instructions
that can't be changed into a blx instruction so only Thumb callers would
call Thumb thunks and only ARM callers would call ARM thunks. With range
extension thunks branch and link instructions may need a Thunk. These
instructions can be rewritten as a blx and can use either ARM or Thumb
thunks.

We introduce an isCompatibleWith() function so that a caller can check if
an existing Thunk is compatible before reusing it.

Differential Revision: https://reviews.llvm.org/D34035

llvm-svn: 307132

The allocateHeaders() function is called at the end of assignAddresses(), it
decides whether the ELF header and program header table can be allocated to
a PT_LOAD program header. As the function alters state, it prevents
assignAddresses() from being called multiple times.

This change splits out the call to allocateHeaders() from assignAddresses()
this will permit assignAddresses() to be called while processing range
extension thunks without trying to allocateHeaders().

Differential Revision: https://reviews.llvm.org/D34344

llvm-svn: 307131

Reviewers: alexfh, aaron.ballman

Reviewed By: alexfh

Subscribers: JDevlieghere, Eugene.Zelenko, xazax.hun, cfe-commits

Differential Revision: https://reviews.llvm.org/D34206

llvm-svn: 307130

These cases occur frequently for declarations in the global module (above the
module-declaration) in a Modules TS module interface. When we merge a
definition from another module into such a module-private definition, ensure
that we transitively make everything lexically within that definition visible
to that translation unit.

llvm-svn: 307129

This has been introduced in r304598 and fails for increased stack sizes.

Differential Revision: https://reviews.llvm.org/D34876

llvm-svn: 307127

-If there is a IndVar which is known to be non-negative, and there is a value which is also non-negative,
then signed and unsigned comparisons between them produce the same result. Both of those can be
seen in the same loop. To allow other optimizations to simplify them, we turn all instructions like

  %c = icmp slt i32 %iv, %b
to

  %c = icmp ult i32 %iv, %b

if both %iv and %b are known to be non-negative.

Differential Revision: https://reviews.llvm.org/D34979

llvm-svn: 307126

[GlobalISel][X86] Allow graceful fallback for struct/array argument/return value lowering. Going to support it in follow patch.

llvm-svn: 307125

llvm-svn: 307124

llvm-svn: 307123

llvm-svn: 307122

Differential Revision: https://reviews.llvm.org/D34995

llvm-svn: 307121

Remove casts to a constant when a node can be an undef.

Differential Revision: https://reviews.llvm.org/D34808

llvm-svn: 307120

llvm-svn: 307119

In order for IDE's like CLion to correctly parse and highlight the tests
it needs to know roughly how to build them. This patch adds a dummy CMake target
for each/all of the .pass.cpp tests in the test suite to solve this problem.
The target is only created when LIBCXX_CONFIGURE_IDE=ON, so it shouldn't affect
most users.

Originally I wasn't sure that this change deserved to live upstream, but it's
quite frustrating to edit libc++ tests using CLion or Visual Studio without it,
in particular the filesystem tests which rely heavily on macros. Even though the change
should have no effect on non-IDE users/configurations I decided to commit it upstream
with the hopes it will benefit somebody other than me.

llvm-svn: 307118

This patch speculatively implements the PR for LWG 2937, which fixes
two issues with equivalent.

(1) It makes equivalent("dne", "exists") an error. Previously only
    equivalent("dne", "dne") was an error and the former case was not (it returned false).
    Now equivalent reports an error when either input doesn't exist.

(2) It makes equivalent(p1, p2) well-formed when `is_other(p1) && is_other(p2)`.
    Previously this was an error, but there is seemingly no reason why it should be on POSIX system.

llvm-svn: 307117

Summary: Otherwise internal flags will be also completed.

Differential Revision: https://reviews.llvm.org/D34930

llvm-svn: 307116

the module if declared in an export block. 

llvm-svn: 307115

Relanding after rewriting undef.ll test to avoid host-dependant
endianness.

As discussed in D34087, rewrite areNonVolatileConsecutiveLoads using
generic checks. Also, propagate missing local handling from there to
BaseIndexOffset checks.

Tests of note:

  * test/CodeGen/X86/build-vector* - Improved.
  * test/CodeGen/BPF/undef.ll - Improved store alignment allows an
    additional store merge

  * test/CodeGen/X86/clear_upper_vector_element_bits.ll - This is a
    case we already do not handle well. Here, the DAG is improved, but
    scheduling causes a code size degradation.

Reviewers: RKSimon, craig.topper, spatel, andreadb, filcab

Subscribers: nemanjai, llvm-commits

Differential Revision: https://reviews.llvm.org/D34472

llvm-svn: 307114

getValueSitesForKind returns ArrayRef which has a cast operator
to std::vector, as a result a temporary vector is created
if the type of the variable is const std::vector& 
that is suboptimal in this case.

Differential revision: https://reviews.llvm.org/D34970

Test plan: make check-all

llvm-svn: 307113

Original Patch and summary by Philip Reames.

RewriteStatepointsForGC tries to rewrite a function in a manner where
the optimizer can't end up using a pointer value after it might have
been relocated by a safepoint. This pass checks the invariant that
RSForGC is supposed to establish and that (if we constructed semantics
correctly) later passes must preserve.

This has been a really useful diagnostic tool when initially developing
the rewriting scheme and has found numerous bugs.

Differential Revision: https://reviews.llvm.org/D15940

Reviewed by: swaroop.sridhar, mjacob

Subscribers: llvm-commits
llvm-svn: 307112

This reverts commit 602ef067c1d58ecb425d061f35f2bc4c7e92f4f3.

llvm-svn: 307111

This is a semantic revert of r306036.

We have to change the names, otherwise dynamic relocations will point
to the wrong name.

llvm-svn: 307110

We should rewrite this using the generic branch relaxation pass, but for
the moment having this pass is better than hitting an assertion error.

llvm-svn: 307109

NFC.
Made some updates to the half.ll test under CodeGen to make it friendly to the update_llc_test_checks .py tool as follows:
1.Removing the llc flag -asm-verbose=false
2.Grouping the multiple check-prefix directives
3.Apply update_llc_test_checks.py tool on the test

This change is needed to easily update scheduling changes in an upcoming patch.

Reviewers: zvi, RKSimon, craig.topper 

Differential Revision: https://reviews.llvm.org/D34934

llvm-svn: 307108

This is finally getting to the point where output sections are
constructed.

createOrphanCommands and fabricateDefaultCommands are moved out so
they can be merged with existing code in followup commits.

llvm-svn: 307107

Recommit r307064, "[InstCombine] Add test cases demonstrating creation of extra bswap instrinsic calls when when optimizing bswap and bitwise ops when the bswaps have additional uses. NFC"

The test check lines have now been fixed.

llvm-svn: 307106

Currently AMDGPUTargetInfo does not initialize AddrSpaceMap in constructor, which causes regressions in mesa/clover with libclc.

This patch fixes that.

Differential Revision: https://reviews.llvm.org/D34987

llvm-svn: 307105

Summary:
Enable LLVM asan sanitizer for NetBSD/amd64.

Don't generate -ldl for dlopen(3)-like functions on NetBSD.
These features are available in libc on NetBSD.

Sponsored by <The NetBSD Foundation>

Reviewers: joerg, eugenis, kcc, dim

Reviewed By: dim

Subscribers: #clang, #sanitizers

Tags: #clang, #sanitizers

Differential Revision: https://reviews.llvm.org/D34960

llvm-svn: 307104

llvm-svn: 307103

Now addSectionSymbols operates on the linker script.

llvm-svn: 307102

Now all of finalizeSections works on the linker script.

llvm-svn: 307101

Now addPredefinedSections operates only on the linker script.

llvm-svn: 307100

With the improved shuffle decoding we can now combine EXTRQI/INSERTQI shuffles from non-v16i8 vector types

llvm-svn: 307099

llvm-svn: 307098

Differential revision: https://reviews.llvm.org/D34407

llvm-svn: 307097

llvm-svn: 307096