T0b1/wasmtime
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Cranelift: Correctly wrap shifts in constant propagation (#5695)

Browse Source 
Fixes #5690
Fixes #5696

Co-authored-by: Jamey Sharp <jsharp@fastly.com>
This commit is contained in:
Nick Fitzgerald
2023-02-02 16:12:57 -08:00
committed by GitHub
parent fd67ccf9cd
commit 72c8513411
10 changed files with 176 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
cranelift/codegen/src/opts/cprop.isle
View File

@@ -56,18 +56,18 @@
(subsume (iconst ty (imm64_masked ty (u64_not k)))))
(rule (simplify (ishl (fits_in_64 ty)
(iconst ty (u64_from_imm64 k1))
(iconst ty (u64_from_imm64 k2))))
(subsume (iconst ty (imm64_masked ty (u64_shl k1 k2)))))
(iconst ty k1)
(iconst _ k2)))
(subsume (iconst ty (imm64_shl ty k1 k2))))
(rule (simplify (ushr (fits_in_64 ty)
(iconst ty k1)
(iconst ty k2)))
(iconst _ k2)))
(subsume (iconst ty (imm64_ushr ty k1 k2))))
(rule (simplify (sshr (fits_in_64 ty)
(iconst ty k1)
(iconst ty k2)))
(iconst _ k2)))
(subsume (iconst ty (imm64_sshr ty k1 k2))))
(rule (simplify