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Codegen fix atomic_rmw_loop missing move result to dst register On riscv64. (#5898)

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* fix issue5884.

* fix issue5884

* fix test failure

* fix atomic rmw missing move result to dst register.

* specify little endian some s390x can pass test.
This commit is contained in:
yuyang
2023-03-06 19:27:46 +08:00
committed by GitHub
parent ad584f428a
commit 20198d94c6
2 changed files with 40 additions and 13 deletions
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33
cranelift/codegen/src/isa/riscv64/inst/emit.rs
View File

@@ -1375,7 +1375,7 @@ impl MachInstEmit for Inst {
| crate::ir::AtomicRmwOp::And
| crate::ir::AtomicRmwOp::Or
| crate::ir::AtomicRmwOp::Xor => {
AtomicOP::extract(t0, offset, dst.to_reg(), ty)
AtomicOP::extract(dst, offset, dst.to_reg(), ty)
.iter()
.for_each(|i| i.emit(&[], sink, emit_info, state));
Inst::AluRRR {
@@ -1388,7 +1388,7 @@ impl MachInstEmit for Inst {
_ => unreachable!(),
},
rd: t0,
rs1: t0.to_reg(),
rs1: dst.to_reg(),
rs2: x,
}
.emit(&[], sink, emit_info, state);
@@ -1412,19 +1412,16 @@ impl MachInstEmit for Inst {
spilltmp_reg2()
}
crate::ir::AtomicRmwOp::Nand => {
let x2 = if ty.bits() < 32 {
AtomicOP::extract(t0, offset, dst.to_reg(), ty)
if ty.bits() < 32 {
AtomicOP::extract(dst, offset, dst.to_reg(), ty)
.iter()
.for_each(|i| i.emit(&[], sink, emit_info, state));
t0.to_reg()
} else {
dst.to_reg()
};
}
Inst::AluRRR {
alu_op: AluOPRRR::And,
rd: t0,
rs1: x,
rs2: x2,
rs2: dst.to_reg(),
}
.emit(&[], sink, emit_info, state);
Inst::construct_bit_not(t0, t0.to_reg()).emit(&[], sink, emit_info, state);
@@ -1456,12 +1453,13 @@ impl MachInstEmit for Inst {
| crate::ir::AtomicRmwOp::Umax
| crate::ir::AtomicRmwOp::Smin
| crate::ir::AtomicRmwOp::Smax => {
let label_select_dst = sink.get_label();
let label_select_done = sink.get_label();
if op == crate::ir::AtomicRmwOp::Umin || op == crate::ir::AtomicRmwOp::Umax
{
AtomicOP::extract(t0, offset, dst.to_reg(), ty)
AtomicOP::extract(dst, offset, dst.to_reg(), ty)
} else {
AtomicOP::extract_sext(t0, offset, dst.to_reg(), ty)
AtomicOP::extract_sext(dst, offset, dst.to_reg(), ty)
}
.iter()
.for_each(|i| i.emit(&[], sink, emit_info, state));
@@ -1473,9 +1471,9 @@ impl MachInstEmit for Inst {
crate::ir::AtomicRmwOp::Smax => IntCC::SignedGreaterThan,
_ => unreachable!(),
},
ValueRegs::one(t0.to_reg()),
ValueRegs::one(dst.to_reg()),
ValueRegs::one(x),
BranchTarget::Label(label_select_done),
BranchTarget::Label(label_select_dst),
BranchTarget::zero(),
ty,
)
@@ -1483,6 +1481,12 @@ impl MachInstEmit for Inst {
.for_each(|i| i.emit(&[], sink, emit_info, state));
// here we select x.
Inst::gen_move(t0, x, I64).emit(&[], sink, emit_info, state);
Inst::Jal {
dest: BranchTarget::Label(label_select_done),
}
.emit(&[], sink, emit_info, state);
sink.bind_label(label_select_dst);
Inst::gen_move(t0, dst.to_reg(), I64).emit(&[], sink, emit_info, state);
sink.bind_label(label_select_done);
Inst::Atomic {
op: AtomicOP::load_op(ty),
@@ -1504,6 +1508,9 @@ impl MachInstEmit for Inst {
spilltmp_reg2()
}
crate::ir::AtomicRmwOp::Xchg => {
AtomicOP::extract(dst, offset, dst.to_reg(), ty)
.iter()
.for_each(|i| i.emit(&[], sink, emit_info, state));
Inst::Atomic {
op: AtomicOP::load_op(ty),
rd: writable_spilltmp_reg2(),

20
cranelift/filetests/filetests/runtests/issue5884.clif Normal file
View File

@@ -0,0 +1,20 @@
test run
target aarch64
target x86_64
target riscv64
target s390x
function %a(i64, i16) -> i16 {
ss0 = explicit_slot 8
block0(v0: i64, v1: i16):
v2 = stack_addr.i64 ss0+0
store little v0, v2
v3 = stack_addr.i64 ss0+6
v4 = atomic_rmw.i16 little or v3, v1
return v4
}
; run: %a(8608481011852310776, 0) == 30583