V4: Fix stack alignment in JITted code

Helper calls done for to-integer and to-number conversions did not align
the stack on 16byte boundaries, which could lead to crashes if somewhere
in that call a vector instruction is used that expects such alignment.

Task-number: QTBUG-71325
Change-Id: Ieec05a93a1f69b538e6c8930b8eb64cbe85c35d4
Reviewed-by: Jüri Valdmann <juri.valdmann@qt.io>
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/qml/jit/qv4assemblercommon_p.h b/src/qml/jit/qv4assemblercommon_p.h
index bf239fcfd8..c17fdd3a23 100644
--- a/src/qml/jit/qv4assemblercommon_p.h
+++ b/src/qml/jit/qv4assemblercommon_p.h
@@ -320,14 +320,14 @@ public:
 
     void pushAligned(RegisterID reg)
     {
-        subPtr(TrustedImm32(PointerSize), StackPointerRegister);
+        subPtr(TrustedImm32(3 * PointerSize), StackPointerRegister);
         push(reg);
     }
 
     void popAligned(RegisterID reg)
     {
         pop(reg);
-        addPtr(TrustedImm32(PointerSize), StackPointerRegister);
+        addPtr(TrustedImm32(3 * PointerSize), StackPointerRegister);
     }
 };