- Move CodeModel from a TargetMachine global option to MCCodeGenInfo.

- Introduce JITDefault code model. This tells targets to set different default
  code model for JIT. This eliminates the ugly hack in TargetMachine where
  code model is changed after construction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135580 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 2 deletions

diff --git a/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp b/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp
index 9e415a8..298de32 100644
--- a/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp
+++ b/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp
@@ -339,7 +339,8 @@ extern "C" void LLVMInitializeX86MCAsmInfo() {
   RegisterMCAsmInfoFn B(TheX86_64Target, createX86MCAsmInfo);
 }
 
-MCCodeGenInfo *createX86MCCodeGenInfo(StringRef TT, Reloc::Model RM) {
+MCCodeGenInfo *createX86MCCodeGenInfo(StringRef TT, Reloc::Model RM,
+                                      CodeModel::Model CM) {
   MCCodeGenInfo *X = new MCCodeGenInfo();
 
   Triple T(TT);
@@ -376,7 +377,14 @@ MCCodeGenInfo *createX86MCCodeGenInfo(StringRef TT, Reloc::Model RM) {
   if (RM == Reloc::Static && T.isOSDarwin() && is64Bit)
     RM = Reloc::PIC_;
 
-  X->InitMCCodeGenInfo(RM);
+  // For static codegen, if we're not already set, use Small codegen.
+  if (CM == CodeModel::Default)
+    CM = CodeModel::Small;
+  else if (CM == CodeModel::JITDefault)
+    // 64-bit JIT places everything in the same buffer except external funcs.
+    CM = is64Bit ? CodeModel::Large : CodeModel::Small;
+
+  X->InitMCCodeGenInfo(RM, CM);
   return X;
 }