Implement the AsmPrinter::getPreferredAlignmentLog method.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25978 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter.cpp
index db223de..b489df6 100644
--- a/lib/CodeGen/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter.cpp
@@ -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 {