Test input for arm assembly differences

arm-test.m

// clang -arch armv7 -framework Foundation -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk -S arm-test.m -o armv7-test.s

#import <Foundation/Foundation.h>

int main(const int argc, const char* const* argv) {
    @autoreleasepool {
        NSString* string;
        
        string = @"hello";
        
        NSLog(@"print: %s", [string UTF8String]);
    }
    
    return 0;
}

Without optimization, the arm code appears identical. With -O3, the code deviates substantially.

Still unsure if ABI is the same...

Take that back, only a little different. Still, interesting.