k: A memory operand whose address is formed by a base register and
(optionally scaled) index register.
m: A memory operand whose address is formed by a base register and
offset that is suitable for use in instructions with the same
addressing mode as st.w and ld.w.
ZB: An address that is held in a general-purpose register. The offset
is zero.
ZC: A memory operand whose address is formed by a base register and
offset that is suitable for use in instructions with the same
addressing mode as ll.w and sc.w.
Differential Revision: https://reviews.llvm.org/D134638
LoongArchELFObjectWriter::getRelocType check IsPCRel for FK_Data_4
(which we produce a R_LARCH_32_PCREL relocation for if IsPCRel).
R_LARCH_32_PCREL is required for FDE relocation.
Differential Revision: https://reviews.llvm.org/D134715
The target selection DAG lowering information is needed for
SelectionDAGBuilder to lower a call like memcmp into an optimized
form.
Differential Revision: https://reviews.llvm.org/D134712
Defines LoongArch registers for getExceptionPointerRegister() and
getExceptionSelectorRegister().
Differential Revision: https://reviews.llvm.org/D134709
This patch uses a unified interface for lower GlobalAddress ConstantPool
BlockAddress and JumpTable.
This patch allows lowering addresses by using PC-relative addressing
for DSO-local symbols, and accessing the address through the global
offset table for DSO-preemptable symbols.
Remove hardcoded `MininumJumpTableEntries` for test lower JumpTable.
Also updated some test cases using ConstantPool, due to the addition of
relocation information.
Differential Revision: https://reviews.llvm.org/D134431
As the LoongArch port is largely modeled after RISCV it has the same
behavior of not accepting `generic` as a CPU name. For better
compatibility with consumers of LLVM (e.g. mesa) follow D121149's suit
and treat `generic` the same as an empty CPU name.
Differential Revision: https://reviews.llvm.org/D134412
As explained in D68559 the `fastcc` calling convention may be requested
under certain conditions, hence the need for supporting it. But unlike
RISCV we actually treat it exactly like ccc, without actually inventing
any performance hack right here. And CSKY does the same thing.
This is going to fix a few more test cases with native LoongArch builds.
Differential Revision: https://reviews.llvm.org/D134443
This patch adds support for constraints `f`, `l`, `I`, `K` according
to [1]. The remain constraints (`k`, `m`, `ZB`, `ZC`) will be added
later as they are a little more complex than the others.
f: A floating-point register (if available).
l: A signed 16-bit constant.
I: A signed 12-bit constant (for arithmetic instructions).
K: An unsigned 12-bit constant (for logic instructions).
For now, no need to support register alias (e.g. `$a0`) in llvm as
clang will correctly decode the usage of register name aliases into
their official names. And AFAIK, the not yet upstreamed `rustc` for
LoongArch will always use official register names (e.g. `$r4`).
[1] https://gcc.gnu.org/onlinedocs/gccint/Machine-Constraints.html
Differential Revision: https://reviews.llvm.org/D134157
All in-tree targets pass pointer-sized ConstantSDNodes to the
method. This overload reduced amount of boilerplate code a bit. This
also makes getCALLSEQ_END consistent with getCALLSEQ_START, which
already takes uint64_ts.
A complete implementation of `applyFixup` for D132323.
Makes `LoongArchAsmBackend::shouldForceRelocation` to determine
if the relocation types must be forced.
This patch also adds range and alignment checks for `b*` instructions'
operands, at which point the offset to a label is known.
Differential Revision: https://reviews.llvm.org/D132818
According to the revised description in `LoongArch Reference Manual v1.02`,
frint.[s/d] does not judge whether floating-point inexact exceptions are
allowed indicated by FCSR, i.e. always executes roundToIntegralExact(x).
What's more, the manual also specifically defines that frint.s/d is only
necessary to be defined in LA64. So ISD::FRINT is legal for LA64.
Differential Revision: https://reviews.llvm.org/D133337
LLVM contains a helpful function for getting the size of a C-style
array: `llvm::array_lengthof`. This is useful prior to C++17, but not as
helpful for C++17 or later: `std::size` already has support for C-style
arrays.
Change call sites to use `std::size` instead.
Differential Revision: https://reviews.llvm.org/D133429
In order to avoid the patch being too large, the atomicrmw xchg operation
on LA32 will be added later
Differential Revision: https://reviews.llvm.org/D131228
This patch makes the assembler support all modifiers defined in gnu-as.
Also changes some diagnostic information.
Differential Revision: https://reviews.llvm.org/D132633
This commit moves the information on whether a register is constant into
the Tablegen files to allow generating the implementaiton of
isConstantPhysReg(). I've marked isConstantPhysReg() as final in this
generated file to ensure that changes are made to tablegen instead of
overriding this function, but if that turns out to be too restrictive,
we can remove the qualifier.
This should be pretty much NFC, but I did notice that e.g. the AMDGPU
generated file also includes the LO16/HI16 registers now.
The new isConstant flag will also be used by D131958 to ensure that
constant registers are marked as call-preserved.
Differential Revision: https://reviews.llvm.org/D131962
Similar to D76746 (ARM), D76754 (AArch64), D77018 (RISCV) and
llvmorg-11-init-6967-g152d14da64c (x86)
Differential Revision: https://reviews.llvm.org/D132119
This patch only add %pc_hi20/%pc_lo12/%plt relocations in order
to be able to generate gnu ld linkable relocation file for the
`hello world` IR :
```
@.str = private unnamed_addr constant [14 x i8] c"Hello world!\0A\00", align 1
define dso_local signext i32 @main() nounwind {
entry:
%call = call signext i32 (ptr, ...) @printf(ptr noundef @.str)
ret i32 0
}
declare dso_local signext i32 @printf(ptr noundef, ...)
```
This patch also updates some test cases due to new modifiers introduced.
New test: test/MC/LoongArch/Relocations/relocations.s
Differential Revision: https://reviews.llvm.org/D132108
gonglingqin