V4: Collect trace information in the interpreter

Collect type information about values used in a function. These include
all parameters, and the results of many bytecode instructions. For array
loads/stores, it also tracks if the access is in-bounds of a
SimpleArrayData.

Collection is only enabled when the qml-tracing feature is turned on
while configuring.

In subsequent patches this is used to generated optimized JITted code.

Change-Id: I63985c334c3fdc55fca7fb4addfe3e535989aac5
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

1 files changed, 13 insertions, 0 deletions

diff --git a/src/qml/jit/qv4assemblercommon.cpp b/src/qml/jit/qv4assemblercommon.cpp
index 35b8f34633..d5d97f8284 100644
--- a/src/qml/jit/qv4assemblercommon.cpp
+++ b/src/qml/jit/qv4assemblercommon.cpp
@@ -298,6 +298,19 @@ void PlatformAssemblerCommon::passInt32AsArg(int value, int arg)
         store32(TrustedImm32(value), argStackAddress(arg));
 }
 
+void JIT::PlatformAssemblerCommon::passPointerAsArg(void *ptr, int arg)
+{
+#ifndef QT_NO_DEBUG
+    Q_ASSERT(arg < remainingArgcForCall);
+    --remainingArgcForCall;
+#endif
+
+    if (arg < ArgInRegCount)
+        move(TrustedImmPtr(ptr), registerForArg(arg));
+    else
+        storePtr(TrustedImmPtr(ptr), argStackAddress(arg));
+}
+
 void PlatformAssemblerCommon::callRuntime(const char *functionName, const void *funcPtr)
 {
 #ifndef QT_NO_DEBUG