[Webkit-unassigned] [Bug 98628] New: Build Error in compiling FastMalloc.cpp on ARM Thumb2 with GCC

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=98628

           Summary: Build Error in compiling FastMalloc.cpp on ARM Thumb2
                    with GCC
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Web Template Framework
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: sg5.lee at samsung.com


If I compile with USE_SYSTEM_MALLOC=OFF and ENABLE_FAST_MALLOC=ON for ARM thumb2, I got following compilation error.

{standard input}: Assembler messages:
{standard input}:1393: Error: bad immediate value for offset (3712)
...
{standard input}:13127: Error: bad immediate value for offset (3712)
{standard input}:13130: Error: bad immediate value for offset (3712)
make[2]: *** [Source/WTF/wtf/CMakeFiles/wtf_efl.dir/FastMalloc.cpp.o] Error 1

It seems the g++ generated assembly code is too big. 
As a result, it is out of range of Thumb2 jump range.
( I am using gcc 4.5.3. )

If I compile FastMalloc.cpp with -O0, the error does not occurs.
( Above error is occurs with -O3, -O2, and -O1 )

I found that by compiling only the function

ALWAYS_INLINE void TCMalloc_Central_FreeList::ReleaseToSpans(void* object)

with -O0, the error disappears.

Above function seems to be too large to force inlining for gcc 4.5.3.

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