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Add trap codes to the Cretonne IL.

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The trap and trapz/trapnz instructions now take a trap code immediate
operand which indicates the reason for trapping.
This commit is contained in:
Jakob Stoklund Olesen
2017-09-20 13:58:57 -07:00
parent 0f21fd342a
commit e8723be33f
28 changed files with 199 additions and 62 deletions
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8
lib/cretonne/src/legalizer/heap.rs
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@@ -74,14 +74,14 @@ fn dynamic_addr(
// We need an overflow check for the adjusted offset.
let size_val = pos.ins().iconst(offset_ty, size);
let (adj_offset, overflow) = pos.ins().iadd_cout(offset, size_val);
pos.ins().trapnz(overflow);
pos.ins().trapnz(overflow, ir::TrapCode::HeapOutOfBounds);
oob = pos.ins().icmp(
IntCC::UnsignedGreaterThan,
adj_offset,
bound,
);
}
pos.ins().trapnz(oob);
pos.ins().trapnz(oob, ir::TrapCode::HeapOutOfBounds);
offset_addr(inst, heap, addr_ty, offset, offset_ty, pos.func);
}
@@ -103,7 +103,7 @@ fn static_addr(
// Start with the bounds check. Trap if `offset + size > bound`.
if size > bound {
// This will simply always trap since `offset >= 0`.
pos.ins().trap();
pos.ins().trap(ir::TrapCode::HeapOutOfBounds);
pos.func.dfg.replace(inst).iconst(addr_ty, 0);
return;
}
@@ -129,7 +129,7 @@ fn static_addr(
limit,
)
};
pos.ins().trapnz(oob);
pos.ins().trapnz(oob, ir::TrapCode::HeapOutOfBounds);
}
offset_addr(inst, heap, addr_ty, offset, offset_ty, pos.func);