Summary:
Using the linker-supplied list of "preserved" symbols, we can compute
the list of "dead" symbols, i.e. the one that are not reachable from
a "preserved" symbol transitively on the reference graph.
Right now we are using this information to mark these functions as
non-eligible for import.
The impact is two folds:
- Reduction of compile time: we don't import these functions anywhere
or import the function these symbols are calling.
- The limited number of import/export leads to better internalization.
Patch originally by Mehdi Amini.
Reviewers: mehdi_amini, pcc
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D23488
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291177 91177308-0d34-0410-b5e6-96231b3b80d8
do not use .cfi_sections. This requires checking if any non-declaration
function in the module needs an unwind table.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291172 91177308-0d34-0410-b5e6-96231b3b80d8
Promotion is always legal when a store within the loop is guaranteed to execute.
However, this is not a necessary condition - for promotion to be memory model
semantics-preserving, it is enough to have a store that dominates every exit
block. This is because if the store dominates every exit block, the fact the
exit block was executed implies the original store was executed as well.
Differential Revision: https://reviews.llvm.org/D28147
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291171 91177308-0d34-0410-b5e6-96231b3b80d8
Add an assert that checks whether liveins are up to date before they are
used.
- Do not print liveins into .mir files anymore in situations where they
are out of date anyway.
- The assert in the RegisterScavenger is superseded by the new one in
livein_begin().
- Skip parts of the liveness updating logic in IfConversion.cpp when
liveness isn't tracked anymore (just enough to avoid hitting the new
assert()).
Differential Revision: https://reviews.llvm.org/D27562
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291169 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Preheader instruction's operands will always be invariant w.r.t. the loop which its the preheader
for.
Memory aliases are handled in canSinkOrHoistInst.
Reviewers: danielcdh, davidxl
Subscribers: mzolotukhin, llvm-commits
Differential Revision: https://reviews.llvm.org/D28270
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291132 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
For instructions such as PSLLW/PSLLD/PSLLQ a variable shift amount may be passed in an XMM register.
The lower 64-bits of the register are evaluated to determine the shift amount.
This patch improves the construction of the vector containing the shift amount.
Reviewers: craig.topper, delena, RKSimon
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D28353
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291120 91177308-0d34-0410-b5e6-96231b3b80d8
Instructions: fctidu[.], fctiwu[.], ftdiv, ftsqrt are not implemented. Implement
them and add corresponding test cases in this patch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291116 91177308-0d34-0410-b5e6-96231b3b80d8
Should fix some more bot failures from r291108.
This should have been a DenseSet, since GUID is not a pointer type.
It caused some bots to fail, but for some reason I wasnt't getting a
build failure.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291115 91177308-0d34-0410-b5e6-96231b3b80d8
Should fix bot failures due to r291108 which happened due to a
change required in ModuleSummaryIndexYAML.h which was just added in
r291069.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291111 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This adds a new summary flag NotEligibleToImport that subsumes
several existing flags (NoRename, HasInlineAsmMaybeReferencingInternal
and IsNotViableToInline). It also subsumes the checking of references
on the summary that was being done during the thin link by
eligibleForImport() for each candidate. It is much more efficient to
do that checking once during the per-module summary build and record
it in the summary.
Reviewers: mehdi_amini
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D28169
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291108 91177308-0d34-0410-b5e6-96231b3b80d8
This code seems to be target dependent which may not be the same for all targets.
Passed the decision whether the given stride is complex or not to the target by sending stride information via SCEV to getAddressComputationCost instead of 'IsComplex'.
Specifically at X86 targets we dont see any significant address computation cost in case of the strided access in general.
Differential Revision: https://reviews.llvm.org/D27518
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291106 91177308-0d34-0410-b5e6-96231b3b80d8
To make this work, pointers from the MachineBasicBlock to the LLVM-IR-level
basic blocks need to be initialized, as the AsmPrinter uses this link to be
able to print out labels for the basic blocks that are address-taken.
Most of the changes in this commit are about adapting existing tests to include
the basic block name that is now printed out in the MIR format, now that the
name becomes available as the link to the LLVM-IR basic block is initialized.
The relevant test change for the functionality added in this patch are the
added "(address-taken)" strings in
test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll.
Differential Revision: https://reviews.llvm.org/D28123
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291105 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Intel's i5-6300U CPU is reporting to have a model id of 78 (4e).
The Host detection assumes that to be Skylake Xeon (with AVX512 support),
instead of a normal Skylake machine.
Patch by: Valentin Churavy
Reviewers: nalimilan, craig.topper
Subscribers: hfinkel, tkelman, craig.topper, nalimilan, llvm-commits
Differential Revision: https://reviews.llvm.org/D28221
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291084 91177308-0d34-0410-b5e6-96231b3b80d8
