Summary:
Appropriately set/clear the FeatureBit for Mips16 when these assembler directives are used and also emit ".set nomips16" (previously, only ".set mips16" was being emitted).
These improvements allow for better testing of the .cpload/.cprestore assembler directives (which are not supposed to work when Mips16 is enabled).
Test Plan: The test is bare-bones because there are no MC tests for Mips16 instructions (there's only one, which checks that the Mips16 ELF header flag gets set), and that suggests to me that it has not been implemented yet in the IAS.
Reviewers: dsanders
Reviewed By: dsanders
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D5462
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221277 91177308-0d34-0410-b5e6-96231b3b80d8
sret arguments can never originate from an f128 argument so we detect
sret arguments and push false into OriginalArgWasF128.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221102 91177308-0d34-0410-b5e6-96231b3b80d8
r221056 "[mips] Move F128 argument handling into MipsCCState as we did for returns. NFC."
r221058 "[mips] Fix unused variable warning introduced in r221056"
r221059 "[mips] Move all ByVal handling into CCState and tablegen-erated code. NFC."
r221061 "Renamed CCState members that appear to misspell 'Processed' as 'Proceed'. NFC."
It cuased an undefined behavior in LLVM :: CodeGen/Mips/return-vector.ll.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221081 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
CCState already contains a byval implementation that is very similar to the
Mips custom code. This patch merges the custom code into the existing
common code and tablegen-erated code.
Reviewers: vmedic
Reviewed By: vmedic
Subscribers: rnk, llvm-commits
Differential Revision: http://reviews.llvm.org/D5977
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221059 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
There are a couple more changes to make before analyzeFormalArguments can
be merged into the standard AnalyzeFormalArguments. I've had to temporarily
poke a couple holes in MipsCCState's encapsulation to save having to make
all the required changes for this merge all at once*. These will be removed
shortly.
* We must merge our ByVal argument handling with the implementation in CCState.
This will be done over the next three patches, then the fourth will merge
analyzeFormalArguments with AnalyzeFormalArguments.
Depends on D5967
Reviewers: vmedic
Reviewed By: vmedic
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D5969
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221056 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
It's now passed in as an argument to functions that need it. Eventually
this argument will be replaced by the 'this' pointer for a MipsCCState
object.
Depends on D5966
Reviewers: vmedic
Reviewed By: vmedic
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D5967
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221054 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
There is one remaining trace of it in MipsCC::analyzeCallOperands() where
Mips16 might override the calling convention. This will moved into
tablegen-erated code later.
Depends on D5965
Reviewers: vmedic
Reviewed By: vmedic
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D5966
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221053 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
CustomCallingConv is simply a CallingConv that tablegen should not generate the
implementation for. It allows regular CallingConv's to delegate to these custom
functions. This is (currently) necessary for Mips and we cannot use CCCustom
without having to adapt to the different API that CCCustom uses.
This brings us a bit closer to being able to remove
MipsCC::analyzeCallOperands and MipsCC::analyzeFormalArguments in favour of
the common implementation.
No functional change to the targets.
Depends on D3341
Reviewers: vmedic
Reviewed By: vmedic
Subscribers: vmedic, llvm-commits
Differential Revision: http://reviews.llvm.org/D5965
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221052 91177308-0d34-0410-b5e6-96231b3b80d8
It seems I can't commit unless $DBUS_SESSION_BUS_ADDRESS is set correctly and
it is not set for ssh sessions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221049 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
No functional change yet, it's just an object replacement for an enum.
It will allow us to gather ABI information in a single place so that we can
start testing for properties of the ABI's instead of the ABI itself.
For example we will eventually be able to use:
ABI.MinStackAlignmentInBytes()
instead of:
(isABI_N32() || isABI_N64()) ? 16 : 8
which is clearer and more maintainable.
Reviewers: matheusalmeida
Reviewed By: matheusalmeida
Differential Revision: http://reviews.llvm.org/D3341
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220568 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Most structs were fixed by r218451 but those of between >32-bits and
<64-bits remained broken since they were not marked with [ASZ]ExtUpper.
This patch fixes the remaining cases by using
CCPromoteToUpperBitsInType<i64> on i64's in addition to i32 and smaller.
Reviewers: vmedic
Reviewed By: vmedic
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D5963
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220556 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Backends can use setInsertFencesForAtomic to signal to the middle-end that
montonic is the only memory ordering they can accept for
stores/loads/rmws/cmpxchg. The code lowering those accesses with a stronger
ordering to fences + monotonic accesses is currently living in
SelectionDAGBuilder.cpp. In this patch I propose moving this logic out of it
for several reasons:
- There is lots of redundancy to avoid: extremely similar logic already
exists in AtomicExpand.
- The current code in SelectionDAGBuilder does not use any target-hooks, it
does the same transformation for every backend that requires it
- As a result it is plain *unsound*, as it was apparently designed for ARM.
It happens to mostly work for the other targets because they are extremely
conservative, but Power for example had to switch to AtomicExpand to be
able to use lwsync safely (see r218331).
- Because it produces IR-level fences, it cannot be made sound ! This is noted
in the C++11 standard (section 29.3, page 1140):
```
Fences cannot, in general, be used to restore sequential consistency for atomic
operations with weaker ordering semantics.
```
It can also be seen by the following example (called IRIW in the litterature):
```
atomic<int> x = y = 0;
int r1, r2, r3, r4;
Thread 0:
x.store(1);
Thread 1:
y.store(1);
Thread 2:
r1 = x.load();
r2 = y.load();
Thread 3:
r3 = y.load();
r4 = x.load();
```
r1 = r3 = 1 and r2 = r4 = 0 is impossible as long as the accesses are all seq_cst.
But if they are lowered to monotonic accesses, no amount of fences can prevent it..
This patch does three things (I could cut it into parts, but then some of them
would not be tested/testable, please tell me if you would prefer that):
- it provides a default implementation for emitLeadingFence/emitTrailingFence in
terms of IR-level fences, that mimic the original logic of SelectionDAGBuilder.
As we saw above, this is unsound, but the best that can be done without knowing
the targets well (and there is a comment warning about this risk).
- it then switches Mips/Sparc/XCore to use AtomicExpand, relying on this default
implementation (that exactly replicates the logic of SelectionDAGBuilder, so no
functional change)
- it finally erase this logic from SelectionDAGBuilder as it is dead-code.
Ideally, each target would define its own override for emitLeading/TrailingFence
using target-specific fences, but I do not know the Sparc/Mips/XCore memory model
well enough to do this, and they appear to be dealing fine with the ARM-inspired
default expansion for now (probably because they are overly conservative, as
Power was). If anyone wants to compile fences more agressively on these
platforms, the long comment should make it clear why he should first override
emitLeading/TrailingFence.
Test Plan: make check-all, no functional change
Reviewers: jfb, t.p.northover
Subscribers: aemerson, llvm-commits
Differential Revision: http://reviews.llvm.org/D5474
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219957 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
In order to support big endian targets for the BuildPairF64 nodes we
just need to swap the low/high pair registers. Additionally, for the
ExtractElementF64 nodes we have to calculate the correct stack offset
with respect to the node's register/operand that we want to extract.
Reviewers: dsanders
Reviewed By: dsanders
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D5753
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219931 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
In order to facilitate use of common code, checking by reviewers of other fast-isel ports, and hopefully to eventually move most of Mips and other fast-isel ports into target independent code, I've tried to get the two implementations to line up.
There is no functional code change. Just methods moved in the file to be in the same order as in AArch64.
Test Plan: No functional change.
Reviewers: dsanders
Reviewed By: dsanders
Subscribers: llvm-commits, aemerson, rfuhler
Differential Revision: http://reviews.llvm.org/D5692
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219703 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Make Mips fast-isel track the form of AArch64 where practical.
This makes it easier for people to review the code, to borrow similar code, and to see how to eventually move a lot of this
target code for fast-isels into target independent code.
These are just cosmetic changes. Should be no functional difference.
Test Plan:
make check
test-suite for 4 flavors mips32 r1/r2 , -O0/-O2
Reviewers: dsanders
Reviewed By: dsanders
Subscribers: aemerson, llvm-commits, rfuhler
Differential Revision: http://reviews.llvm.org/D5595
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219633 91177308-0d34-0410-b5e6-96231b3b80d8
Summary: Implement the most basic form of conditional branches in Mips fast-isel.
Test Plan:
br1.ll
run 4 flavors of test-suite. mips32 r1/r2 and at -O0/O2
Reviewers: dsanders
Reviewed By: dsanders
Subscribers: llvm-commits, rfuhler
Differential Revision: http://reviews.llvm.org/D5583
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219556 91177308-0d34-0410-b5e6-96231b3b80d8
is over a subset of condition codes.
This fixes the -Werror build which warns about use of uninitialized
variables in the default case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219531 91177308-0d34-0410-b5e6-96231b3b80d8
