Summary:
Sometimes, bitsets could get really large (>300k entries) and
we might want to drop a check, as it would have a too much cost.
Adding a flag to control how much penalty are we willing to pay
for bitsets.
Reviewers: kcc
Differential Revision: https://reviews.llvm.org/D23088
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277556 91177308-0d34-0410-b5e6-96231b3b80d8
Move those two options to llc:
The options in CommandFlags.h are shared by dsymutil, gold, llc,
llvm-dwp, llvm-lto, llvm-mc, lto, opt.
-stop-after/-start-after only affect codegen passes however only gold and llc
actually create codegen passes and I believe these flags to be only
useful for users of llc. For the other tools they are just highly
confusing: -stop-after claims to "Stop compilation after a specific
pass" which is not true in the context of the "opt" tool.
Differential Revision: https://reviews.llvm.org/D23050
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277551 91177308-0d34-0410-b5e6-96231b3b80d8
Leftover from D22686; the passes can handle all the instructions
unconditionally; only isel needs to care whether to generate them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277549 91177308-0d34-0410-b5e6-96231b3b80d8
I examined a few PDBs and all of them treated pages for stream 0
are unused, thus they were unmarked in their free page bitmap.
I think we should do the same thing for compatibility.
Differential Revision: https://reviews.llvm.org/D23047
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277545 91177308-0d34-0410-b5e6-96231b3b80d8
In this particular example we wouldn't want the smmls anyway (the value is
actually unused), but in general smmls does not provide the required flags
register so if that SUBE result is used we can't replace it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277541 91177308-0d34-0410-b5e6-96231b3b80d8
Fixed the last incorrect uses of llvm_unreachable() in the code
which were actually just cases of errors in the input Archives.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277540 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Currently, the Scudo Hardened Allocator only gets its flags via the SCUDO_OPTIONS environment variable.
With this patch, we offer the opportunity for programs to define their own options via __scudo_default_options() which behaves like __asan_default_options() (weak symbol).
A relevant test has been added as well, and the documentation updated accordingly.
I also used this patch as an opportunity to rename a few variables to comply with the LLVM naming scheme, and replaced a use of Report with dieWithMessage for consistency (and to avoid a callback).
Reviewers: llvm-commits, kcc
Differential Revision: https://reviews.llvm.org/D23018
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277536 91177308-0d34-0410-b5e6-96231b3b80d8
There were issues with simply reporting AttrUnknown on
previously-unknown values in CFLAnders. So, we now act *entirely*
conservatively for values we haven't seen before. As in the prior patch
(r277362), writing a lit test for this isn't exactly trivial. If someone
wants a test badly, I'm willing to try to write one.
Patch by Jia Chen.
Differential Revision: https://reviews.llvm.org/D23077
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277533 91177308-0d34-0410-b5e6-96231b3b80d8
Summary: We really want to move towards MemoryLocOrCall (or fix AA) everywhere, but for now, this lets us have a single instructionClobbersQuery.
Reviewers: george.burgess.iv
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D23072
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277530 91177308-0d34-0410-b5e6-96231b3b80d8
As agreed in post-commit review of r265388, I'm switching the flag to
its original value until the 90% runtime performance regression on
SingleSource/Benchmarks/Stanford/Bubblesort is addressed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277524 91177308-0d34-0410-b5e6-96231b3b80d8
LLI already supported passing multiple input modules to MCJIT via the
-extra-module option. This patch adds the plumbing to pass these modules to
the OrcLazy JIT too.
This functionality will be used in an upcoming test case for weak symbol
handling.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277521 91177308-0d34-0410-b5e6-96231b3b80d8
We were relying on the misleadingly-names $status result to actually be the
status. Actually it's just a scratch register that may or may not be valid (and
is the inverse of the real ststus anyway). Success can be determined by
comparing the value loaded against the one we wanted to see for "cmpxchg
strong" loops like this.
Should fix PR28819.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277513 91177308-0d34-0410-b5e6-96231b3b80d8
This changes IRCE to "preserve" LCSSA and DomTree by recomputing them.
It still does not preserve LoopSimplify.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277505 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Two types of stores are possible in pixel shaders: stores to memory that are
explicitly requested at the API level, and stores that are an implementation
detail of register spilling or lowering of arrays.
For the first kind of store, we must ensure that helper pixels have no effect
and hence WQM must be disabled. The second kind of store must always be
executed, because the written value may be loaded again in a way that is
relevant for helper pixels as well -- and there are no externally visible
effects anyway.
This is a candidate for the 3.9 release branch.
Reviewers: arsenm, tstellarAMD, mareko
Subscribers: arsenm, kzhuravl, llvm-commits
Differential Revision: https://reviews.llvm.org/D22675
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277504 91177308-0d34-0410-b5e6-96231b3b80d8
Attempt 2: Retryign after Tsan.mman test fix.
Attempt 1: Recommitting after fixing test.
When parsing assembly where the line comment syntax is not hash, the
lexer cannot distinguish between hash's that start a hash line comment
and one that is part of an assembly statement and must be distinguished
during parsing. Previously, this was incompletely handled by not checking
for EndOfStatement at the end of statements and interpreting hash
prefixed statements as comments.
Change EndOfStatement Parsing to check for Hash comments and reintroduce
Hash statement parsing to catch previously handled cases.
Reviewers: rnk, majnemer
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D23017
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277501 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
There are cases where uniform branch conditions are computed in VGPRs, and
we didn't correctly mark those as WQM.
The stray change in basic-branch.ll is because invoking the LiveIntervals
analysis leads to the detection of a dead register that would otherwise not
be seen at -O0.
This is a candidate for the 3.9 branch, as it fixes a possible hang.
Reviewers: arsenm, tstellarAMD, mareko
Subscribers: arsenm, llvm-commits, kzhuravl
Differential Revision: https://reviews.llvm.org/D22673
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277500 91177308-0d34-0410-b5e6-96231b3b80d8
Identify patterns where the address is aligned to an 8-byte boundary,
but both the base address and the constant offset are both proper
multiples of 4. In such cases, extract Base+4 into a separate instruc-
tion, and use S2_storerd_io, instead of using S4_storerd_rr.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277497 91177308-0d34-0410-b5e6-96231b3b80d8
Recommitting after fixing overaggressive fastpath return in parsing.
Fix intel syntax special case identifier operands that refer to a constant
(e.g. .set <ID> n) to be interpreted as immediate not memory in parsing.
Associated commit to fix clang test commited shortly.
Reviewers: rnk
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D22585
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277489 91177308-0d34-0410-b5e6-96231b3b80d8
I thought the directory had a lit.local.cfg, but it doesn't.
I'll add one, but for now, add the REQUIRES line. While there,
move the triple into the IR and add a datalayout.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277486 91177308-0d34-0410-b5e6-96231b3b80d8
None of GlobalISel requires the property, but this lets us use the
verifier instead of rolling our own "all instructions selected" check.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277484 91177308-0d34-0410-b5e6-96231b3b80d8
After instruction selection, there should be no pre-isel generic
instructions remaining, nor should generic virtual registers be
used. Verify that.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277483 91177308-0d34-0410-b5e6-96231b3b80d8
Selected: the InstructionSelect pass ran and all pre-isel generic
instructions have been eliminated; i.e., all instructions are now
target-specific or non-pre-isel generic instructions (e.g., COPY).
Since only pre-isel generic instructions can have generic virtual register
operands, this also means that all generic virtual registers have been
constrained to virtual registers (assigned to register classes) and that
all sizes attached to them have been eliminated.
This lets us enforce certain invariants across passes.
This property is GlobalISel-specific, but is always available.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277482 91177308-0d34-0410-b5e6-96231b3b80d8
Fixes PR28670
Summary:
Rewrite the use optimizer to be less memory intensive and 50% faster.
Fixes PR28670
The new use optimizer works like a standard SSA renaming pass, storing
all possible versions a MemorySSA use could get in a stack, and just
tracking indexes into the stack.
This uses much less memory than caching N^2 alias query results.
It's also a lot faster.
The current version defers phi node walking to the normal walker.
Reviewers: george.burgess.iv
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D23032
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277480 91177308-0d34-0410-b5e6-96231b3b80d8
The InstructionSelect pass assumes that RegBankSelect ran; set the
property on all tests (thereby verifying the test inputs) and require
it in the pass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277477 91177308-0d34-0410-b5e6-96231b3b80d8
RegBankSelected functions shouldn't have any generic virtual
register not assigned to a bank. Verify that.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277476 91177308-0d34-0410-b5e6-96231b3b80d8
RegBankSelected: the RegBankSelect pass ran and all generic virtual
registers have been assigned to a register bank.
This lets us enforce certain invariants across passes.
This property is GlobalISel-specific, but is always available.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277475 91177308-0d34-0410-b5e6-96231b3b80d8
