79f7fa6079
* Cranelift: implement `heap_{load,store}` instruction legalization
This does not remove `heap_addr` yet, but it does factor out the common
bounds-check-and-compute-the-native-address functionality that is shared between
all of `heap_{addr,load,store}`.
Finally, this adds a missing optimization for when we can dedupe explicit bounds
checks for static memories and Spectre mitigations.
* Cranelift: Enable `heap_load_store_*` run tests on all targets
23 lines
621 B
Plaintext
23 lines
621 B
Plaintext
test legalizer
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set enable_heap_access_spectre_mitigation=true
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target x86_64
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;; The offset guard is large enough that we don't need explicit bounds checks.
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function %test(i64 vmctx, i32) -> i64 {
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gv0 = vmctx
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gv1 = load.i64 notrap aligned gv0+0
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heap0 = static gv1, min 0x1000, bound 0x1000, offset_guard 0xffff_ffff, index_type i32
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block0(v0: i64, v1: i32):
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v2 = heap_addr.i64 heap0, v1, 0, 4
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return v2
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}
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; check: block0(v0: i64, v1: i32):
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; nextln: v3 = uextend.i64 v1
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; nextln: v4 = load.i64 notrap aligned v0
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; nextln: v5 = iadd v4, v3
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; nextln: v2 -> v5
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; nextln: return v2
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