Version 1.2.4.
Improved performance of floating point number allocation for ARM platforms.
Fixed crash when using the instanceof operator on functions with number values in their prototype chain (issue 341).
Optimized virtual frame operations in the code generator to speed up compilation time and allocated the frames in the zone.
Made the representation of virtual frames and jump targets in the code generator much more compact.
Avoided linear search for non-locals in scope code when resolving variables inside with and eval scopes.
Optimized lexical scanner by dealing with whitespace as part of the token scanning instead of as a separate step before it.
Changed the scavenging collector so that promoted objects do not reside in the old generation while their remembered set is being swept for pointers into the young generation.
Fixed numeric overflow handling when compiling count operations.
git-svn-id: http://v8.googlecode.com/svn/trunk@1983 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/src/arm/macro-assembler-arm.cc b/src/arm/macro-assembler-arm.cc
index 365c1ad..ee82da1 100644
--- a/src/arm/macro-assembler-arm.cc
+++ b/src/arm/macro-assembler-arm.cc
@@ -291,6 +291,12 @@
void MacroAssembler::EnterExitFrame(StackFrame::Type type) {
ASSERT(type == StackFrame::EXIT || type == StackFrame::EXIT_DEBUG);
+
+ // Compute the argv pointer and keep it in a callee-saved register.
+ // r0 is argc.
+ add(r6, sp, Operand(r0, LSL, kPointerSizeLog2));
+ sub(r6, r6, Operand(kPointerSize));
+
// Compute parameter pointer before making changes and save it as ip
// register so that it is restored as sp register on exit, thereby
// popping the args.
@@ -298,6 +304,17 @@
// ip = sp + kPointerSize * #args;
add(ip, sp, Operand(r0, LSL, kPointerSizeLog2));
+ // Align the stack at this point. After this point we have 5 pushes,
+ // so in fact we have to unalign here! See also the assert on the
+ // alignment immediately below.
+ if (OS::ActivationFrameAlignment() != kPointerSize) {
+ // This code needs to be made more general if this assert doesn't hold.
+ ASSERT(OS::ActivationFrameAlignment() == 2 * kPointerSize);
+ mov(r7, Operand(Smi::FromInt(0)));
+ tst(sp, Operand(OS::ActivationFrameAlignment() - 1));
+ push(r7, eq); // Conditional push instruction.
+ }
+
// Push in reverse order: caller_fp, sp_on_exit, and caller_pc.
stm(db_w, sp, fp.bit() | ip.bit() | lr.bit());
mov(fp, Operand(sp)); // setup new frame pointer
@@ -316,9 +333,6 @@
mov(r4, Operand(r0));
mov(r5, Operand(r1));
- // Compute the argv pointer and keep it in a callee-saved register.
- add(r6, fp, Operand(r4, LSL, kPointerSizeLog2));
- add(r6, r6, Operand(ExitFrameConstants::kPPDisplacement - kPointerSize));
#ifdef ENABLE_DEBUGGER_SUPPORT
// Save the state of all registers to the stack from the memory