+static std::string computeDataLayout(const Triple &TT) {
+ // X86 is little endian
+ std::string Ret = "e";
+
+ Ret += DataLayout::getManglingComponent(TT);
+ // X86 and x32 have 32 bit pointers.
+ if ((TT.isArch64Bit() &&
+ (TT.getEnvironment() == Triple::GNUX32 || TT.isOSNaCl())) ||
+ !TT.isArch64Bit())
+ Ret += "-p:32:32";
+
+ // Some ABIs align 64 bit integers and doubles to 64 bits, others to 32.
+ if (TT.isArch64Bit() || TT.isOSWindows() || TT.isOSNaCl())
+ Ret += "-i64:64";
+ else
+ Ret += "-f64:32:64";
+
+ // Some ABIs align long double to 128 bits, others to 32.
+ if (TT.isOSNaCl())
+ ; // No f80
+ else if (TT.isArch64Bit() || TT.isOSDarwin())
+ Ret += "-f80:128";
+ else
+ Ret += "-f80:32";
+
+ // The registers can hold 8, 16, 32 or, in x86-64, 64 bits.
+ if (TT.isArch64Bit())
+ Ret += "-n8:16:32:64";
+ else
+ Ret += "-n8:16:32";
+
+ // The stack is aligned to 32 bits on some ABIs and 128 bits on others.
+ if (!TT.isArch64Bit() && TT.isOSWindows())
+ Ret += "-a:0:32-S32";
+ else
+ Ret += "-S128";
+
+ return Ret;
+}
+