Put constant data to .const, .const_data, .literal{4|8|16} sections.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35016 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86AsmPrinter.cpp b/lib/Target/X86/X86AsmPrinter.cpp
index 75003e6..ad9a1e8 100644
--- a/lib/Target/X86/X86AsmPrinter.cpp
+++ b/lib/Target/X86/X86AsmPrinter.cpp
@@ -145,7 +145,8 @@
     
     std::string name = Mang->getValueName(I);
     Constant *C = I->getInitializer();
-    unsigned Size = TD->getTypeSize(C->getType());
+    const Type *Type = C->getType();
+    unsigned Size = TD->getTypeSize(Type);
     unsigned Align = TD->getPreferredAlignmentLog(I);
 
     if (I->hasHiddenVisibility())
@@ -250,8 +251,28 @@
       } else {
         if (C->isNullValue() && !NoZerosInBSS && TAI->getBSSSection())
           SwitchToDataSection(TAI->getBSSSection(), I);
-        else
+        else if (!I->isConstant())
           SwitchToDataSection(TAI->getDataSection(), I);
+        else {
+          // Read-only data.
+          bool isIntFPLiteral = Type->isInteger()  || Type->isFloatingPoint();
+          if (C->ContainsRelocations() && Subtarget->isTargetDarwin() &&
+              TM.getRelocationModel() != Reloc::Static)
+            SwitchToDataSection("\t.const_data\n");
+          else if (isIntFPLiteral && Size == 4 &&
+                   TAI->getFourByteConstantSection())
+            SwitchToDataSection(TAI->getFourByteConstantSection(), I);
+          else if (isIntFPLiteral && Size == 8 &&
+                   TAI->getEightByteConstantSection())
+            SwitchToDataSection(TAI->getEightByteConstantSection(), I);
+          else if (isIntFPLiteral && Size == 16 &&
+                   TAI->getSixteenByteConstantSection())
+            SwitchToDataSection(TAI->getSixteenByteConstantSection(), I);
+          else if (TAI->getReadOnlySection())
+            SwitchToDataSection(TAI->getReadOnlySection(), I);
+          else
+            SwitchToDataSection(TAI->getDataSection(), I);
+        }
       }
       
       break;