704f5a5772
* Support mergeable-but-side-effectful (idempotent) operations in general in the egraph's GVN. This mirrors the similar change made in #5534. * Add tests for egraph case.
93 lines
3.2 KiB
Plaintext
93 lines
3.2 KiB
Plaintext
;;! target = "x86_64"
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;;!
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;;! optimize = true
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;;!
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;;! settings = [
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;;! "enable_heap_access_spectre_mitigation=true",
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;;! "opt_level=speed_and_size",
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;;! "use_egraphs=true"
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;;! ]
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;;!
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;;! [globals.vmctx]
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;;! type = "i64"
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;;! vmctx = true
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;;!
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;;! [globals.heap_base]
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;;! type = "i64"
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;;! load = { base = "vmctx", offset = 0 }
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;;!
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;;! [globals.heap_bound]
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;;! type = "i64"
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;;! load = { base = "vmctx", offset = 8 }
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;;!
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;;! [[heaps]]
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;;! base = "heap_base"
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;;! min_size = 0
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;;! offset_guard_size = 0xffffffff
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;;! index_type = "i32"
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;;! style = { kind = "dynamic", bound = "heap_bound" }
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(module
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(memory (export "memory") 0)
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(func (export "load-without-offset") (param i32) (result i32 i32)
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local.get 0
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i32.load
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local.get 0
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i32.load
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)
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(func (export "load-with-offset") (param i32) (result i32 i32)
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local.get 0
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i32.load offset=1234
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local.get 0
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i32.load offset=1234
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)
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)
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;; function u0:0(i32, i64 vmctx) -> i32, i32 fast {
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;; gv0 = vmctx
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;; gv1 = load.i64 notrap aligned gv0+8
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;; gv2 = load.i64 notrap aligned gv0
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;;
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;; block0(v0: i32, v1: i64):
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;; @0057 v4 = uextend.i64 v0
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;; @0057 v5 = iconst.i64 4
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;; @0057 v6 = uadd_overflow_trap v4, v5, heap_oob ; v5 = 4
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;; @0057 v7 = load.i64 notrap aligned v1+8
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;; @0057 v8 = load.i64 notrap aligned v1
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;; @0057 v11 = icmp ugt v6, v7
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;; @0057 v10 = iconst.i64 0
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;; @0057 v9 = iadd v8, v4
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;; @0057 v12 = select_spectre_guard v11, v10, v9 ; v10 = 0
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;; @0057 v13 = load.i32 little heap v12
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;; v2 -> v13
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;; @005f jump block1
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;;
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;; block1:
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;; @005f return v13, v13
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;; }
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;;
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;; function u0:1(i32, i64 vmctx) -> i32, i32 fast {
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;; gv0 = vmctx
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;; gv1 = load.i64 notrap aligned gv0+8
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;; gv2 = load.i64 notrap aligned gv0
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;;
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;; block0(v0: i32, v1: i64):
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;; @0064 v4 = uextend.i64 v0
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;; @0064 v5 = iconst.i64 1238
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;; @0064 v6 = uadd_overflow_trap v4, v5, heap_oob ; v5 = 1238
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;; @0064 v7 = load.i64 notrap aligned v1+8
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;; @0064 v8 = load.i64 notrap aligned v1
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;; @0064 v12 = icmp ugt v6, v7
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;; @0064 v11 = iconst.i64 0
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;; @0064 v9 = iadd v8, v4
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;; v26 = iconst.i64 1234
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;; @0064 v10 = iadd v9, v26 ; v26 = 1234
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;; @0064 v13 = select_spectre_guard v12, v11, v10 ; v11 = 0
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;; @0064 v14 = load.i32 little heap v13
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;; v2 -> v14
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;; @006e jump block1
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;;
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;; block1:
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;; @006e return v14, v14
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;; }
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