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Support heaps with no offset-guard pages.

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Also, say "guard-offset pages" rather than just "guard pages" to describe the
region of a heap which is never accessible and which exists to support
optimizations for heap accesses with offsets.

And, introduce a `Uimm64` immediate type, and make all heap fields use
`Uimm64` instead of `Imm64` since they really are unsigned.
This commit is contained in:
Dan Gohman
2018-11-29 04:53:30 -08:00
parent 93696a80bb
commit a20c852148
27 changed files with 302 additions and 172 deletions
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16
cranelift/filetests/parser/memory.clif
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@@ -52,13 +52,13 @@ ebb0:
; Declare static heaps.
function %sheap(i32, i64 vmctx) -> i64 {
heap1 = static gv5, min 0x1_0000, bound 0x1_0000_0000, guard 0x8000_0000
heap2 = static gv5, guard 0x1000, bound 0x1_0000
heap1 = static gv5, min 0x1_0000, bound 0x1_0000_0000, offset_guard 0x8000_0000
heap2 = static gv5, offset_guard 0x1000, bound 0x1_0000
gv4 = vmctx
gv5 = iadd_imm.i64 gv4, 64
; check: heap1 = static gv5, min 0x0001_0000, bound 0x0001_0000_0000, guard 0x8000_0000
; check: heap2 = static gv5, min 0, bound 0x0001_0000, guard 4096
; check: heap1 = static gv5, min 0x0001_0000, bound 0x0001_0000_0000, offset_guard 0x8000_0000
; check: heap2 = static gv5, min 0, bound 0x0001_0000, offset_guard 4096
ebb0(v1: i32, v2: i64):
v3 = heap_addr.i64 heap1, v1, 0
; check: v3 = heap_addr.i64 heap1, v1, 0
@@ -67,14 +67,14 @@ ebb0(v1: i32, v2: i64):
; Declare dynamic heaps.
function %dheap(i32, i64 vmctx) -> i64 {
heap1 = dynamic gv5, min 0x1_0000, bound gv6, guard 0x8000_0000
heap2 = dynamic gv5, bound gv6, guard 0x1000
heap1 = dynamic gv5, min 0x1_0000, bound gv6, offset_guard 0x8000_0000
heap2 = dynamic gv5, bound gv6, offset_guard 0x1000
gv4 = vmctx
gv5 = iadd_imm.i64 gv4, 64
gv6 = iadd_imm.i64 gv4, 72
; check: heap1 = dynamic gv5, min 0x0001_0000, bound gv6, guard 0x8000_0000
; check: heap2 = dynamic gv5, min 0, bound gv6, guard 4096
; check: heap1 = dynamic gv5, min 0x0001_0000, bound gv6, offset_guard 0x8000_0000
; check: heap2 = dynamic gv5, min 0, bound gv6, offset_guard 4096
ebb0(v1: i32, v2: i64):
v3 = heap_addr.i64 heap2, v1, 0
; check: v3 = heap_addr.i64 heap2, v1, 0