From: Chris Lattner <sabre@nondot.org>
Date: Sat, 14 Feb 2004 20:10:59 +0000 (+0000)
Subject: There is no reason to align the stack pointer if there are no callees of this function!
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=93799292c1c04c53ff077a427737b3ffbd0445ab;p=oota-llvm.git

There is no reason to align the stack pointer if there are no callees of this function!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11449 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/PrologEpilogInserter.cpp b/lib/CodeGen/PrologEpilogInserter.cpp
index 8f34cf48adb..bf1726d6ed9 100644
--- a/lib/CodeGen/PrologEpilogInserter.cpp
+++ b/lib/CodeGen/PrologEpilogInserter.cpp
@@ -216,8 +216,11 @@ void PEI::calculateFrameObjectOffsets(MachineFunction &Fn) {
     FFI->setObjectOffset(i, -Offset);        // Set the computed offset
   }
 
-  // Align the final stack pointer offset...
-  Offset = (Offset+StackAlignment-1)/StackAlignment*StackAlignment;
+  // Align the final stack pointer offset, but only if there are calls in the
+  // function.  This ensures that any calls to subroutines have their stack
+  // frames suitable aligned.
+  if (FFI->hasCalls())
+    Offset = (Offset+StackAlignment-1)/StackAlignment*StackAlignment;
 
   // Set the final value of the stack pointer...
   FFI->setStackSize(Offset-TFI.getOffsetOfLocalArea());