From a617b53aa86aaf3a3d6d248c53da8f91f3491f44 Mon Sep 17 00:00:00 2001
From: Eric Christopher <echristo@gmail.com>
Date: Sat, 9 Aug 2014 04:38:53 +0000
Subject: [PATCH] Initialize X86 DataLayout based on the Triple only.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215279 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86Subtarget.cpp | 26 ++++++++++++++------------
 lib/Target/X86/X86Subtarget.h   |  5 +++--
 2 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/lib/Target/X86/X86Subtarget.cpp b/lib/Target/X86/X86Subtarget.cpp
index 9f05a2ba4498..9d20d7827c2a 100644
--- a/lib/Target/X86/X86Subtarget.cpp
+++ b/lib/Target/X86/X86Subtarget.cpp
@@ -298,37 +298,39 @@ void X86Subtarget::initializeEnvironment() {
   MaxInlineSizeThreshold = 128;
 }
 
-static std::string computeDataLayout(const X86Subtarget &ST) {
+static std::string computeDataLayout(const Triple &TT) {
   // X86 is little endian
   std::string Ret = "e";
 
-  Ret += DataLayout::getManglingComponent(ST.getTargetTriple());
+  Ret += DataLayout::getManglingComponent(TT);
   // X86 and x32 have 32 bit pointers.
-  if (ST.isTarget64BitILP32() || !ST.is64Bit())
+  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 (ST.is64Bit() || ST.isOSWindows() || ST.isTargetNaCl())
+  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 (ST.isTargetNaCl())
+  if (TT.isOSNaCl())
     ; // No f80
-  else if (ST.is64Bit() || ST.isTargetDarwin())
+  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 (ST.is64Bit())
+  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 (!ST.is64Bit() && ST.isOSWindows())  
+  if (!TT.isArch64Bit() && TT.isOSWindows())  
     Ret += "-S32";
   else
     Ret += "-S128";
@@ -348,16 +350,16 @@ X86Subtarget::X86Subtarget(const std::string &TT, const std::string &CPU,
                            unsigned StackAlignOverride)
     : X86GenSubtargetInfo(TT, CPU, FS), X86ProcFamily(Others),
       PICStyle(PICStyles::None), TargetTriple(TT),
+      DL(computeDataLayout(TargetTriple)),
       StackAlignOverride(StackAlignOverride),
       In64BitMode(TargetTriple.getArch() == Triple::x86_64),
       In32BitMode(TargetTriple.getArch() == Triple::x86 &&
                   TargetTriple.getEnvironment() != Triple::CODE16),
       In16BitMode(TargetTriple.getArch() == Triple::x86 &&
                   TargetTriple.getEnvironment() == Triple::CODE16),
-      DL(computeDataLayout(*this)), TSInfo(DL),
-      InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM),
-      FrameLowering(TargetFrameLowering::StackGrowsDown, getStackAlignment(),
-                    is64Bit() ? -8 : -4),
+      TSInfo(DL), InstrInfo(initializeSubtargetDependencies(CPU, FS)),
+      TLInfo(TM), FrameLowering(TargetFrameLowering::StackGrowsDown,
+                                getStackAlignment(), is64Bit() ? -8 : -4),
       JITInfo(hasSSE1()) {
   // Determine the PICStyle based on the target selected.
   if (TM.getRelocationModel() == Reloc::Static) {
diff --git a/lib/Target/X86/X86Subtarget.h b/lib/Target/X86/X86Subtarget.h
index 75e8ae5dc2b6..00984bd596bd 100644
--- a/lib/Target/X86/X86Subtarget.h
+++ b/lib/Target/X86/X86Subtarget.h
@@ -223,6 +223,9 @@ class X86Subtarget final : public X86GenSubtargetInfo {
   InstrItineraryData InstrItins;
 
 private:
+  // Calculates type size & alignment
+  const DataLayout DL;
+
   /// StackAlignOverride - Override the stack alignment.
   unsigned StackAlignOverride;
 
@@ -235,8 +238,6 @@ class X86Subtarget final : public X86GenSubtargetInfo {
   /// In16BitMode - True if compiling for 16-bit, false for 32-bit or 64-bit.
   bool In16BitMode;
 
-  // Calculates type size & alignment
-  const DataLayout DL;
   X86SelectionDAGInfo TSInfo;
   // Ordering here is important. X86InstrInfo initializes X86RegisterInfo which
   // X86TargetLowering needs.