Teach emitAlignment to handle explicit alignment requests by globals.

llvm-svn: 24354

2 files changed, 6 insertions, 3 deletions

diff --git a/llvm/include/llvm/CodeGen/AsmPrinter.h b/llvm/include/llvm/CodeGen/AsmPrinter.h
index e6b7fccd07a..1a207271031 100644
--- a/llvm/include/llvm/CodeGen/AsmPrinter.h
+++ b/llvm/include/llvm/CodeGen/AsmPrinter.h
@@ -137,8 +137,9 @@ namespace llvm {
 
     /// emitAlignment - Emit an alignment directive to the specified power of
     /// two boundary.  For example, if you pass in 3 here, you will get an 8
-    /// byte alignment.
-    void emitAlignment(unsigned NumBits) const;
+    /// byte alignment.  If a global value is specified, and if that global has
+    /// an explicit alignment requested, it will override the alignment request.
+    void emitAlignment(unsigned NumBits, const GlobalValue *GV = 0) const;
 
     /// emitZeros - Emit a block of zeros.
     ///
diff --git a/llvm/lib/CodeGen/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter.cpp
index 452cc0583ed..a6028e43de8 100644
--- a/llvm/lib/CodeGen/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter.cpp
@@ -35,7 +35,9 @@ void AsmPrinter::setupMachineFunction(MachineFunction &MF) {
 }
 
 // emitAlignment - Emit an alignment directive to the specified power of two.
-void AsmPrinter::emitAlignment(unsigned NumBits) const {
+void AsmPrinter::emitAlignment(unsigned NumBits, const GlobalValue *GV) const {
+  if (GV && GV->getAlignment())
+    NumBits = Log2_32(GV->getAlignment());
   if (NumBits == 0) return;   // No need to emit alignment.
   if (AlignmentIsInBytes) NumBits = 1 << NumBits;
   O << AlignDirective << NumBits << "\n";