Convert gcc-loops to JS-style scoring

Build with the same options (-O2, Emscripten MODULARIZE, etc.) as TSF-wasm before.
Use the WasmEMCCBenchmark class introduced earlier.
Since we want to run multiple iterations (for first, average, worst scoring), change to small workload size.
Each individual iteration still runs >20ms, which we agreed on in the last sync.

Drive-by fixes:
The WasmEMCCBenchmark setup code needs to make sure we don't automatically run main() after setupModule().
The TSF-wasm build script uses `set -o pipefail`, which is a bash option, hence change shebang line.
Add Wall time output also for WasmEMCCBenchmark and WasmLegacyBenchmark.

Author: danleh

JetStreamDriver.js

@@ -1036,6 +1036,7 @@ class WasmEMCCBenchmark extends AsyncBenchmark {
             let Module = {
                 preRun: [],
                 postRun: [],
+                noInitialRun: true,
                 print: print,
                 printErr: printErr,
                 setStatus: function(text) {
@@ -1350,11 +1351,12 @@ class WasmLegacyBenchmark extends Benchmark {
 
         console.log("    Startup:", uiFriendlyNumber(this.startupTime));
         console.log("    Run time:", uiFriendlyNumber(this.runTime));
+        console.log("    Score:", uiFriendlyNumber(this.score));
         if (RAMification) {
             console.log("    Current Footprint:", uiFriendlyNumber(this.currentFootprint));
             console.log("    Peak Footprint:", uiFriendlyNumber(this.peakFootprint));
         }
-        console.log("    Score:", uiFriendlyNumber(this.score));
+        console.log("    Wall time:", uiFriendlyDuration(new Date(this.endTime - this.startTime)));
     }
 };
 
@@ -1922,12 +1924,14 @@ const testPlans = [
     {
         name: "gcc-loops-wasm",
         files: [
-            "./wasm/gcc-loops.js"
+            "./wasm/gcc-loops/build/gcc-loops.js",
+            "./wasm/gcc-loops/benchmark.js",
         ],
         preload: {
-            wasmBinary: "./wasm/gcc-loops.wasm"
+            wasmBinary: "./wasm/gcc-loops/build/gcc-loops.wasm"
         },
-        benchmarkClass: WasmLegacyBenchmark,
+        benchmarkClass: WasmEMCCBenchmark,
+        iterations: 50,
         testGroup: WasmGroup
     },
     {

wasm/TSF/build.sh

@@ -1,10 +1,10 @@
-#!/bin/sh
+#!/bin/bash
 
 set -euo pipefail
 
 touch build.log
 BUILD_LOG="$(realpath build.log)"
-echo "Built on $(date -u '+%Y-%m-%dT%H:%M:%SZ')\n" | tee "$BUILD_LOG"
+echo "Built on $(date -u '+%Y-%m-%dT%H:%M:%SZ')" | tee "$BUILD_LOG"
 
 echo "Toolchain versions" | tee -a "$BUILD_LOG"
 emcc --version | head -n1 | tee -a "$BUILD_LOG"