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8b1aa1860f
wasm-opt doesn't optimize `0 < x || x > y` when y is known to be
positive (e.g. a positive integer constant), so we do it manually.
We also do it in a few places where `y` is not known to be positive in
the Wasm code, but we know it's always positive, for example when it's a
length.
Example improvement in the wasm-opt output:
```
(func $_newArrayLengthCheck (;426;) (param $var0 i64) (result i64)
local.get $var0
i64.const 2147483647
- i64.le_s
- local.get $var0
- i64.const 0
- i64.ge_s
- i32.and
- i32.eqz
+ i64.gt_u
if
i32.const 46
i32.const 0
@@ -19190,13 +19172,8 @@
i64.const 97
i64.sub
local.tee $var3
- i64.const 0
- i64.ge_s
- local.get $var3
i64.const 5
- i64.le_s
- i32.and
- i32.eqz
+ i64.gt_u
if
local.get $var0
local.get $var6
@@ -19810,10 +19787,10 @@
global.get $global4
array.new_fixed $Array<_Type> 2
)
```
Closes #56083.
Change-Id: Idb1dd0d0809b26be8aec3d082aa341c59e1a353d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/373663
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Ömer Ağacan <omersa@google.com>
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| bin | ||
| lib | ||
| .gitignore | ||
| api_readme.md | ||
| BUILD.gn | ||
| OWNERS | ||