3b71a27632
Add preamble syntax for declaring static and dynamic heaps, and update the langref section on heaps. Add IR support for heap references. Remove the heap_load and heap_store as discussed in #144. We will use heap_addr along with native load and store instructions in their place. Add the heap_addr instruction and document its bounds checking semantics.
67 lines
1.7 KiB
Plaintext
67 lines
1.7 KiB
Plaintext
test cat
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test verifier
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function %vmglobal() -> i32 {
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gv3 = vmctx+16
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; check: $gv3 = vmctx+16
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gv4 = vmctx+0
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; check: $gv4 = vmctx
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; not: +0
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gv5 = vmctx -256
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; check: $gv5 = vmctx-256
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ebb0:
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v1 = global_addr.i32 gv3
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; check: $v1 = global_addr.i32 $gv3
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return v1
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}
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function %deref() -> i32 {
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gv3 = vmctx+16
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gv4 = deref(gv3)-32
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; check: $gv4 = deref($gv3)-32
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ebb0:
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v1 = global_addr.i32 gv4
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; check: $v1 = global_addr.i32 $gv4
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return v1
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}
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; Refer to a global variable before it's been declared.
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function %backref() -> i32 {
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gv1 = deref(gv2)-32
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; check: $gv1 = deref($gv2)-32
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gv2 = vmctx+16
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; check: $gv2 = vmctx+16
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ebb0:
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v1 = global_addr.i32 gv1
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return v1
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}
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; Declare static heaps.
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function %sheap(i32) -> i64 {
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heap1 = static reserved_reg, min 0x1_0000, bound 0x1_0000_0000, guard 0x8000_0000
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heap2 = static gv5, guard 0x1000, bound 0x1_0000
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gv5 = vmctx+64
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; check: $heap1 = static reserved_reg, min 0x0001_0000, bound 0x0001_0000_0000, guard 0x8000_0000
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; check: $heap2 = static $gv5, min 0, bound 0x0001_0000, guard 4096
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ebb0(v1: i32):
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v2 = heap_addr.i64 heap1, v1, 0
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; check: $v2 = heap_addr.i64 $heap1, $v1, 0
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return v2
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}
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; Declare dynamic heaps.
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function %dheap(i32) -> i64 {
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heap1 = dynamic reserved_reg, min 0x1_0000, bound gv6, guard 0x8000_0000
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heap2 = dynamic gv5, bound gv6, guard 0x1000
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gv5 = vmctx+64
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gv6 = vmctx+72
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; check: $heap1 = dynamic reserved_reg, min 0x0001_0000, bound $gv6, guard 0x8000_0000
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; check: $heap2 = dynamic $gv5, min 0, bound $gv6, guard 4096
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ebb0(v1: i32):
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v2 = heap_addr.i64 heap2, v1, 0
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; check: $v2 = heap_addr.i64 $heap2, $v1, 0
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return v2
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}
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