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PPC: Changes to allow AIX to compile with gcc 4.8.3

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We were able to remove most of our changes needed to compile
on AIX with an earlier compiler level.  These changes are the
remaining ones.

The changes in heap/heap.cc are needed because otherwise the
compiler complains that result is potentially used before
it is initialized.

The changes in heap/mark-compact.cc are required because
AIX supports the full 64 bit address range so the check
being guarded is invalid.

The changes in build/toolchain.gypi and
test/cctest/cctest/gyp are aix only and are adjust the
compile/link options to allow the AIX build to succeed.

	modified:   build/toolchain.gypi
	modified:   src/heap/heap.cc
	modified:   src/heap/mark-compact.cc
	modified:   test/cctest/cctest.gyp

R=danno@chromium.org, svenpanne@chromium.org

BUG=

Review URL: https://codereview.chromium.org/1013833002

Cr-Commit-Position: refs/heads/master@{#27255}
This commit is contained in:
michael_dawson 2015-03-18 01:43:21 -07:00 committed by Commit bot
parent a7bb84a452
commit 8685219066
4 changed files with 13 additions and 3 deletions
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5
build/toolchain.gypi
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@ -1144,6 +1144,11 @@
}],
['OS=="aix"', {
'ldflags': [ '-Wl,-bbigtoc' ],
'conditions': [
['v8_target_arch=="ppc64"', {
'cflags': [ '-maix64 -mcmodel=large' ],
}],
],
}],
['OS=="android"', {
'variables': {

6
src/heap/heap.cc
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@ -2899,7 +2899,7 @@ AllocationResult Heap::AllocatePropertyCell() {
AllocationResult Heap::AllocateWeakCell(HeapObject* value) {
int size = WeakCell::kSize;
STATIC_ASSERT(WeakCell::kSize <= Page::kMaxRegularHeapObjectSize);
HeapObject* result;
HeapObject* result = NULL;
{
AllocationResult allocation =
AllocateRaw(size, OLD_POINTER_SPACE, OLD_POINTER_SPACE);
@ -4474,7 +4474,7 @@ AllocationResult Heap::AllocateExtendedConstantPoolArray(
AllocationResult Heap::AllocateEmptyConstantPoolArray() {
ConstantPoolArray::NumberOfEntries small(0, 0, 0, 0);
int size = ConstantPoolArray::SizeFor(small);
HeapObject* result;
HeapObject* result = NULL;
{
AllocationResult allocation =
AllocateRaw(size, OLD_DATA_SPACE, OLD_DATA_SPACE);
@ -4490,7 +4490,7 @@ AllocationResult Heap::AllocateSymbol() {
// Statically ensure that it is safe to allocate symbols in paged spaces.
STATIC_ASSERT(Symbol::kSize <= Page::kMaxRegularHeapObjectSize);
HeapObject* result;
HeapObject* result = NULL;
AllocationResult allocation =
AllocateRaw(Symbol::kSize, OLD_POINTER_SPACE, OLD_POINTER_SPACE);
if (!allocation.To(&result)) return allocation;

2
src/heap/mark-compact.cc
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@ -2877,11 +2877,13 @@ class PointersUpdatingVisitor : public ObjectVisitor {
// TODO(ishell): remove, once crbug/454297 is caught.
#if V8_TARGET_ARCH_64_BIT
#ifndef V8_OS_AIX // no point checking on AIX as full 64 range is supported
const uintptr_t kBoundary = V8_UINT64_C(1) << 48;
STATIC_ASSERT(kBoundary > 0);
if (reinterpret_cast<uintptr_t>(heap_obj->address()) >= kBoundary) {
CheckLayoutDescriptorAndDie(heap, slot);
}
#endif
#endif
MapWord map_word = heap_obj->map_word();
if (map_word.IsForwardingAddress()) {

3
test/cctest/cctest.gyp
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@ -272,6 +272,9 @@
},
},
}],
['OS=="aix"', {
'ldflags': [ '-Wl,-bbigtoc' ],
}],
['component=="shared_library"', {
# cctest can't be built against a shared library, so we need to
# depend on the underlying static target in that case.