Try to use wasmer instead of wasmtime to reduce exec time

Author: kateinoigakukun

test/lit.cfg

@@ -1376,7 +1376,7 @@ elif run_os == 'wasi':
            config.swift_test_options, config.swift_frontend_test_options)
     subst_target_swift_frontend_mock_sdk = config.target_swift_frontend
     subst_target_swift_frontend_mock_sdk_after = ""
-    config.target_run = 'wasmtime --'
+    config.target_run = 'wasmer run --'
     if 'interpret' in lit_config.params:
         use_interpreter_for_simple_runs()
     config.target_sil_opt = (

utils/webassembly/linux/install-dependencies.sh

@@ -17,12 +17,9 @@ cd $SWIFT_PATH
 
 ./utils/update-checkout --clone --scheme wasm --skip-repository swift
 
-# Install wasmtime
+# Install wasmer
 
-sudo mkdir /opt/wasmtime && cd /opt/wasmtime
-wget -O - "https://github.com/bytecodealliance/wasmtime/releases/download/v0.8.0/wasmtime-v0.8.0-x86_64-linux.tar.xz" | \
-  sudo tar Jx --strip-components 1
-sudo ln -sf /opt/wasmtime/* /usr/local/bin
+curl https://get.wasmer.io -sSfL | sh
 
 cd $SOURCE_PATH
 

utils/webassembly/macos/install-dependencies.sh

@@ -3,21 +3,14 @@
 set -ex
 
 brew uninstall python@2 || true
-brew install cmake ninja llvm sccache
+brew install cmake ninja llvm sccache wasmer
 
 SOURCE_PATH="$( cd "$(dirname $0)/../../../../" && pwd  )"
 SWIFT_PATH=$SOURCE_PATH/swift
 cd $SWIFT_PATH
 
 ./utils/update-checkout --clone --scheme wasm --skip-repository swift
 
-# Install wasmtime
-
-sudo mkdir /opt/wasmtime && cd /opt/wasmtime
-wget -O - "https://github.com/bytecodealliance/wasmtime/releases/download/v0.8.0/wasmtime-v0.8.0-x86_64-macos.tar.xz" | \
-  sudo tar Jx --strip-components 1
-sudo ln -sf /opt/wasmtime/* /usr/local/bin
-
 cd $SOURCE_PATH
 
 wget -O dist-wasi-sdk.tgz.zip "https://github.com/swiftwasm/wasi-sdk/releases/download/0.2.0-swiftwasm/dist-macos-latest.tgz.zip"