[llvm-commits] CVS: llvm/lib/CodeGen/AsmPrinter.cpp

[Chris Lattner]

Changes in directory llvm/lib/CodeGen:

AsmPrinter.cpp updated: 1.45 -> 1.46
---
Log message:

Implement the AsmPrinter::getPreferredAlignmentLog method.


---
Diffs of the changes:  (+16 -0)

 AsmPrinter.cpp |   16 ++++++++++++++++
 1 files changed, 16 insertions(+)


Index: llvm/lib/CodeGen/AsmPrinter.cpp
diff -u llvm/lib/CodeGen/AsmPrinter.cpp:1.45 llvm/lib/CodeGen/AsmPrinter.cpp:1.46
--- llvm/lib/CodeGen/AsmPrinter.cpp:1.45	Wed Feb  1 16:41:11 2006
+++ llvm/lib/CodeGen/AsmPrinter.cpp	Sat Feb  4 19:29:18 2006
@@ -171,6 +171,22 @@
     }
 }
 
+/// getPreferredAlignmentLog - Return the preferred alignment of the
+/// specified global, returned in log form.  This includes an explicitly
+/// requested alignment (if the global has one).
+unsigned AsmPrinter::getPreferredAlignmentLog(const GlobalVariable *GV) const {
+  unsigned Alignment = TM.getTargetData().getTypeAlignmentShift(GV->getType());
+  if (GV->getAlignment() > (1U << Alignment))
+    Alignment = Log2_32(GV->getAlignment());
+  
+  if (GV->hasInitializer() && Alignment < 4) {
+    // If the global is not external, see if it is large.  If so, give it a
+    // larger alignment.
+    if (TM.getTargetData().getTypeSize(GV->getType()->getElementType()) > 128)
+      Alignment = 4;    // 16-byte alignment.
+  }
+  return Alignment;
+}
 
 // EmitAlignment - Emit an alignment directive to the specified power of two.
 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV) const {