S2wasm runtime funcs (#1027)

* Generate stackSave function in s2wasm

* Generate stackAlloc in s2wasm

* Generate stackRestore in s2wasm

* Update dot_s tests for runtime functions

* Add s2wasm check for exporting runtime functions

* Fix flake8 for s2wasm.py

* Rename wasmBuilder to builder

1 files changed, 36 insertions, 0 deletions

diff --git a/test/llvm_autogenerated/non-executable-stack.wast b/test/llvm_autogenerated/non-executable-stack.wast
index 6b7e830a9..071206e3b 100644
--- a/test/llvm_autogenerated/non-executable-stack.wast
+++ b/test/llvm_autogenerated/non-executable-stack.wast
@@ -2,5 +2,41 @@
  (import "env" "memory" (memory $0 1))
  (table 0 anyfunc)
  (data (i32.const 4) "\10\04\00\00")
+ (export "stackSave" (func $stackSave))
+ (export "stackAlloc" (func $stackAlloc))
+ (export "stackRestore" (func $stackRestore))
+ (func $stackSave (result i32)
+  (i32.load offset=4
+   (i32.const 0)
+  )
+ )
+ (func $stackAlloc (param $0 i32) (result i32)
+  (local $1 i32)
+  (set_local $1
+   (i32.load offset=4
+    (i32.const 0)
+   )
+  )
+  (i32.store offset=4
+   (i32.const 0)
+   (i32.and
+    (i32.add
+     (i32.add
+      (get_local $1)
+      (get_local $0)
+     )
+     (i32.const 15)
+    )
+    (i32.const -16)
+   )
+  )
+  (get_local $1)
+ )
+ (func $stackRestore (param $0 i32)
+  (i32.store offset=4
+   (i32.const 0)
+   (get_local $0)
+  )
+ )
 )
 ;; METADATA: { "asmConsts": {},"staticBump": 1040, "initializers": [] }