1 files changed, 13 insertions, 0 deletions
diff --git a/js/src/irregexp/NativeRegExpMacroAssembler.cpp b/js/src/irregexp/NativeRegExpMacroAssembler.cpp
index f452de6ba..0fb507297 100644
--- a/js/src/irregexp/NativeRegExpMacroAssembler.cpp
+++ b/js/src/irregexp/NativeRegExpMacroAssembler.cpp
@@ -132,6 +132,14 @@ NativeRegExpMacroAssembler::GenerateCode(JSContext* cx, bool match_only)
         pushedNonVolatileRegisters++;
     }
 
+#if defined(XP_IOS) && defined(JS_CODEGEN_ARM)
+    // The stack is 4-byte aligned on iOS, force 8-byte alignment.
+    masm.movePtr(StackPointer, temp0);
+    masm.andPtr(Imm32(~7), StackPointer);
+    masm.push(temp0);
+    masm.push(temp0);
+#endif
+
 #ifndef JS_CODEGEN_X86
     // The InputOutputData* is stored as an argument, save it on the stack
     // above the frame.
@@ -398,6 +406,11 @@ NativeRegExpMacroAssembler::GenerateCode(JSContext* cx, bool match_only)
     masm.freeStack(frameSize);
 #endif
 
+#if defined(XP_IOS) && defined(JS_CODEGEN_ARM)
+    masm.pop(temp0);
+    masm.movePtr(temp0, StackPointer);
+#endif
+
     // Restore non-volatile registers which were saved on entry.
     for (GeneralRegisterBackwardIterator iter(savedNonVolatileRegisters); iter.more(); ++iter)
         masm.Pop(*iter);