Remove getFunctionAlignment from TargetELFInfo and use new MachineFunction alignment method

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74686 91177308-0d34-0410-b5e6-96231b3b80d8

5 files changed, 5 insertions, 34 deletions

diff --git a/include/llvm/Target/TargetELFWriterInfo.h b/include/llvm/Target/TargetELFWriterInfo.h
index c1f54d2..a5b30c4 100644
--- a/include/llvm/Target/TargetELFWriterInfo.h
+++ b/include/llvm/Target/TargetELFWriterInfo.h
@@ -89,10 +89,6 @@ namespace llvm {
                      : (hasRelocationAddend() ? 12 : 8);
     }
 
-    /// getFunctionAlignment - Returns the alignment for function 'F', targets
-    /// with different alignment constraints should overload this method
-    virtual unsigned getFunctionAlignment(const Function *F) const;
-
     /// getRelocationType - Returns the target specific ELF Relocation type.
     /// 'MachineRelTy' contains the object code independent relocation type
     virtual unsigned getRelocationType(unsigned MachineRelTy) const = 0;
diff --git a/lib/CodeGen/ELFCodeEmitter.cpp b/lib/CodeGen/ELFCodeEmitter.cpp
index 168fed5..623507a 100644
--- a/lib/CodeGen/ELFCodeEmitter.cpp
+++ b/lib/CodeGen/ELFCodeEmitter.cpp
@@ -40,10 +40,11 @@ void ELFCodeEmitter::startFunction(MachineFunction &MF) {
   BufferBegin = &BD[0];
   BufferEnd = BufferBegin + BD.capacity();
 
-  // Align the output buffer with function alignment, and
-  // upgrade the section alignment if required
-  unsigned Align =
-    TM.getELFWriterInfo()->getFunctionAlignment(MF.getFunction());
+  // Get the function alignment in bytes
+  unsigned Align = (1 << MF.getAlignment());
+
+  // Align the section size with the function alignment, so the function can
+  // start in a aligned offset, also update the section alignment if needed.
   if (ES->Align < Align) ES->Align = Align;
   ES->Size = (ES->Size + (Align-1)) & (-Align);
 
diff --git a/lib/Target/TargetELFWriterInfo.cpp b/lib/Target/TargetELFWriterInfo.cpp
index 9651e65..3631b35 100644
--- a/lib/Target/TargetELFWriterInfo.cpp
+++ b/lib/Target/TargetELFWriterInfo.cpp
@@ -24,13 +24,3 @@ TargetELFWriterInfo::TargetELFWriterInfo(TargetMachine &tm) : TM(tm) {
 
 TargetELFWriterInfo::~TargetELFWriterInfo() {}
 
-/// getFunctionAlignment - Returns the alignment for function 'F', targets
-/// with different alignment constraints should overload this method
-unsigned TargetELFWriterInfo::getFunctionAlignment(const Function *F) const {
-  const TargetData *TD = TM.getTargetData();
-  unsigned FnAlign = F->getAlignment();
-  unsigned TDAlign = TD->getPointerABIAlignment();
-  unsigned Align = std::max(FnAlign, TDAlign);
-  assert(!(Align & (Align-1)) && "Alignment is not a power of two!");
-  return Align;
-}
diff --git a/lib/Target/X86/X86ELFWriterInfo.cpp b/lib/Target/X86/X86ELFWriterInfo.cpp
index 315118f..912ab0e 100644
--- a/lib/Target/X86/X86ELFWriterInfo.cpp
+++ b/lib/Target/X86/X86ELFWriterInfo.cpp
@@ -59,18 +59,6 @@ unsigned X86ELFWriterInfo::getRelocationType(unsigned MachineRelTy) const {
   return 0;
 }
 
-unsigned X86ELFWriterInfo::getFunctionAlignment(const Function *F) const {
-  unsigned FnAlign = 4;
-
-  if (F->hasFnAttr(Attribute::OptimizeForSize))
-    FnAlign = 1;
-
-  if (F->getAlignment())
-    FnAlign = Log2_32(F->getAlignment());
-
-  return (1 << FnAlign);
-}
-
 long int X86ELFWriterInfo::getAddendForRelTy(unsigned RelTy) const {
   if (is64Bit) {
     switch(RelTy) {
diff --git a/lib/Target/X86/X86ELFWriterInfo.h b/lib/Target/X86/X86ELFWriterInfo.h
index 96485b8..2ba1a0b 100644
--- a/lib/Target/X86/X86ELFWriterInfo.h
+++ b/lib/Target/X86/X86ELFWriterInfo.h
@@ -41,10 +41,6 @@ namespace llvm {
     X86ELFWriterInfo(TargetMachine &TM);
     virtual ~X86ELFWriterInfo();
 
-    /// getFunctionAlignment - Returns the alignment for function 'F', targets
-    /// with different alignment constraints should overload this method
-    virtual unsigned getFunctionAlignment(const Function *F) const;
-
     /// getRelocationType - Returns the target specific ELF Relocation type.
     /// 'MachineRelTy' contains the object code independent relocation type
     virtual unsigned getRelocationType(unsigned MachineRelTy) const;