Summary:
This is like the LLVM_TOOLS_INSTALL_DIR option, but for the utils
that are installed when the LLVM_INSTALL_UTILS.  This option
defaults to 'bin' to remain consistent with the current behavior, but
distros may want to install these to libexec/llvm.

Reviewers: beanz

Reviewed By: beanz

Subscribers: llvm-commits, mgorny

Differential Revision: https://reviews.llvm.org/D30655

llvm-svn: 307150

We used to have a helper that replaced an instruction with a libcall.
That turns out to be too aggressive, since sometimes we need to replace
the instruction with at least two libcalls. Therefore, change our
existing helper to only create the libcall and leave the instruction
removal as a separate step. Also rename the helper accordingly.

llvm-svn: 307149

This implements suggesting other mnemonics when an invalid one is specified,
for example:

$ echo "adXd r1,r2,#3" | llvm-mc -triple arm
<stdin>:1:1: error: invalid instruction, did you mean: add, qadd?
adXd r1,r2,#3
^

The implementation is target agnostic, but as a first step I have added it only
to the ARM backend; so the ARM backend is a good example if someone wants to
enable this too for another target.

Differential Revision: https://reviews.llvm.org/D33128

llvm-svn: 307148

[globalisel][tablegen] Fix the misuse of STATISTICS() on release builds (like r307088) after r307133.

r307133 brought back a couple instances of the same mistake that was already
fixed by r307088. Fixed it again.

Using NumPatternEmitted as a unique id for the tables is not valid on release
builds since the counters don't count in that case.

llvm-svn: 307146

Extract functionality for determining if the target uses AEABI.

llvm-svn: 307145

llvm-svn: 307144

llvm-svn: 307142

This isn't used anywhere yet, but I need it for a future commit.

llvm-svn: 307141

Summary:
Otherwise the fallback path fails with an assertion on x86_64 targets,
when "x86_fp80" is encountered.

Reviewers: t.p.northover, zvi, guyblank

Reviewed By: zvi

Subscribers: rovka, kristof.beyls, llvm-commits

Differential Revision: https://reviews.llvm.org/D34975

llvm-svn: 307140

Add a helper for building simple binary ops like add, mul, sub, and.
This can be used in the future for quickly adding support for or, xor.

llvm-svn: 307139

llvm-svn: 307138

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

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

-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: 307122

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

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

llvm-svn: 307120

Summary: Otherwise internal flags will be also completed.

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

llvm-svn: 307116

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

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

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

llvm-svn: 307103

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

The existing decodes only worked for v16i8 vectors, this adds support for any 128-bit vector

llvm-svn: 307095

llvm-svn: 307094

Exclude InstructionSelectorImpl.h since DEBUG_TYPE may vary between includes.

llvm-svn: 307093

[DAGCombiner] Intermediate variables in visitRotate promoted to the function's begin. NFC precommit for D12833.

llvm-svn: 307091

Using NumPatternEmitted as a unique id for the tables is not valid on release
builds since the counters don't count in that case.

Also fix an unused variable warning.

llvm-svn: 307088

Move from generic to X86 directory since gc intrinsics only supposed in
X86 64 bit.
Add target triple as well.
Fixes build failure in i686-linux-RA  caused by rL307084.

llvm-svn: 307086

llvm-svn: 307085

Summary:
We are crashing in LLC at O0 when gc intrinsics are present in the block.
The reason being FastISel performs basic block ISel by modifying GC.relocates
to be the first instruction in the block. This can cause us to visit the GC
relocate before it's corresponding GC.statepoint is visited, which is incorrect.
When we lower the statepoint, we record the base and derived pointers, along
with the gc.relocates. After this we can visit the gc.relocate.

This patch avoids fastISel from incorrectly creating the block with gc.relocate
as the first instruction.

Reviewers: qcolombet, skatkov, qikon, reames

Reviewed by: skatkov

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D34421

llvm-svn: 307084

Patch by cwabbott (Connor Abbott).

llvm-svn: 307081

llvm-svn: 307080