commit 07631698ac1c6995c2aa3649fbec0fcc8257436e
author Devang Patel <dpatel@apple.com> Wed Oct 25 18:10:07 2006 +0000
committer Devang Patel <dpatel@apple.com> Wed Oct 25 18:10:07 2006 +0000
tree 89a6ef30db1710b5227252a81f2e3e0a43626f1c
parent 9feb308d5157cc37d9905bc74302f925dec0f645

Supply alignment info to linker through LLVMSymbol.

llvm-svn: 31181

llvm/tools/lto/lto.cpp

diff --git a/llvm/tools/lto/lto.cpp b/llvm/tools/lto/lto.cpp
index 5c50770..b08b1a6 100644
--- a/llvm/tools/lto/lto.cpp
+++ b/llvm/tools/lto/lto.cpp
@@ -36,6 +36,7 @@
 #include "llvm/Transforms/IPO.h"
 #include "llvm/Transforms/Scalar.h"
 #include "llvm/Analysis/LoadValueNumbering.h"
+#include "llvm/Support/MathExtras.h"
 #include "llvm/LinkTimeOptimizer.h"
 #include <fstream>
 #include <iostream>
@@ -149,8 +150,7 @@
     return LTO_READ_FAILURE;
 
   // Collect Target info
-  if (!Target) 
-    getTarget(m);
+  getTarget(m);
 
   if (!Target)
     return LTO_READ_FAILURE;
@@ -166,8 +166,10 @@
 
     if (!f->isExternal() && lt != LTOInternalLinkage
         && strncmp (f->getName().c_str(), "llvm.", 5)) {
+      int alignment = ( 16 > f->getAlignment() ? 16 : f->getAlignment());
       LLVMSymbol *newSymbol = new LLVMSymbol(lt, f, f->getName(), 
-                                             mangler.getValueName(f));
+                                             mangler.getValueName(f),
+                                             Log2_32(alignment));
       symbols[newSymbol->getMangledName()] = newSymbol;
       allSymbols[newSymbol->getMangledName()] = newSymbol;
     }
@@ -186,8 +188,10 @@
     LTOLinkageTypes lt = getLTOLinkageType(v);
     if (!v->isExternal() && lt != LTOInternalLinkage
         && strncmp (v->getName().c_str(), "llvm.", 5)) {
+      const TargetData *TD = Target->getTargetData();
       LLVMSymbol *newSymbol = new LLVMSymbol(lt, v, v->getName(), 
-                                             mangler.getValueName(v));
+                                             mangler.getValueName(v),
+                                             TD->getPreferredAlignmentLog(v));
       symbols[newSymbol->getMangledName()] = newSymbol;
       allSymbols[newSymbol->getMangledName()] = newSymbol;
 
@@ -206,6 +210,9 @@
 void
 LTO::getTarget (Module *M) {
 
+  if (Target)
+    return;
+
   std::string Err;
   const TargetMachineRegistry::Entry* March = 
     TargetMachineRegistry::getClosestStaticTargetForModule(*M, Err);
@@ -230,8 +237,7 @@
   PassManager Passes;
   
   // Collect Target info
-  if (!Target) 
-    getTarget(M);
+  getTarget(M);
 
   if (!Target)
     return LTO_NO_TARGET;