Modify dartanalyzer scripts to look more like dart2js scripts.

sdk/bin/dartanalyzer

Index: sdk/bin/dartanalyzer
diff --git a/sdk/bin/dartanalyzer b/sdk/bin/dartanalyzer
index cc49a5c8293165d323178d90213af08683af46d2..1122bedcd533439380a33d5dd8383c6a164e8c9f 100755
--- a/sdk/bin/dartanalyzer
+++ b/sdk/bin/dartanalyzer
@@ -24,8 +24,51 @@ SDK_DIR="$(cd "${BIN_DIR}/.." ; pwd -P)"
 
 SDK_ARG="--dart-sdk=$SDK_DIR"
 
+DART="$BIN_DIR/dart"
+
 SNAPSHOT="$BIN_DIR/snapshots/dartanalyzer.dart.snapshot"
 
-# We are running the snapshot in the built SDK.
-DART="$BIN_DIR/dart"
-exec "$DART" "$SNAPSHOT" "$SDK_ARG" "$@"
+unset EXTRA_VM_OPTIONS
+declare -a EXTRA_VM_OPTIONS
+
+# Set some optimization options that speed up analysis.
+# TODO(paulberry): are these needed?  Could the VM be improved so that
+# they are unnecessary?
+EXTRA_VM_OPTIONS+=("--heap_growth_rate=512")

[Ivan Posva, 2014/10/08 04:52:31]

Please do not use any of these flags unless you know exactly what kind of impact
they have. Once you have analyzed the impact of these flags, please report and
we will work with you to avoid the need of passing them.

+EXTRA_VM_OPTIONS+=("--inlining_hotness=90")
+EXTRA_VM_OPTIONS+=("--optimization_counter_threshold=5000")
+
+case $0 in
+  *_developer)
+    EXTRA_VM_OPTIONS+=('--checked')
+    ;;
+esac
+
+# We allow extra vm options to be passed in through an environment variable.
+if [[ $DART_VM_OPTIONS ]]; then
+  read -a OPTIONS <<< "$DART_VM_OPTIONS"
+  EXTRA_VM_OPTIONS+=("${OPTIONS[@]}")
+fi
+
+if test -f "$SNAPSHOT"; then
+  exec "$DART" "${EXTRA_VM_OPTIONS[@]}" "$SNAPSHOT" "$SDK_ARG" "$@"
+else
+  DART_ROOT="$(cd "${SDK_DIR}/.." ; pwd -P)"
+
+  ANALYZER="$DART_ROOT/pkg/analyzer/bin/analyzer.dart"
+
+  if [ -z "$DART_CONFIGURATION" ];
+  then
+    DART_CONFIGURATION="ReleaseIA32"
+  fi
+
+  if [[ `uname` == 'Darwin' ]]; then
+    BUILD_DIR="$DART_ROOT/xcodebuild/$DART_CONFIGURATION"
+  else
+    BUILD_DIR="$DART_ROOT/out/$DART_CONFIGURATION"
+  fi
+
+  PACKAGE_ROOT="$BUILD_DIR/packages/"
+
+  exec "$DART" "${EXTRA_VM_OPTIONS[@]}" "--package-root=$PACKAGE_ROOT" "$ANALYZER" "$SDK_ARG" "$@"
+fi