[Alignment][NFC] Deprecate getTransientStackAlignment

Summary:
This is patch is part of a series to introduce an Alignment type.
See this thread for context: http://lists.llvm.org/pipermail/llvm-dev/2019-July/133851.html
See this patch for the introduction of the type: https://reviews.llvm.org/D64790

Reviewers: courbet

Subscribers: jholewinski, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D76301

1 files changed, 8 insertions, 11 deletions

diff --git a/llvm/lib/CodeGen/MachineFrameInfo.cpp b/llvm/lib/CodeGen/MachineFrameInfo.cpp
index e5f35ae..7690505 100644
--- a/llvm/lib/CodeGen/MachineFrameInfo.cpp
+++ b/llvm/lib/CodeGen/MachineFrameInfo.cpp
@@ -136,7 +136,7 @@ BitVector MachineFrameInfo::getPristineRegs(const MachineFunction &MF) const {
 uint64_t MachineFrameInfo::estimateStackSize(const MachineFunction &MF) const {
   const TargetFrameLowering *TFI = MF.getSubtarget().getFrameLowering();
   const TargetRegisterInfo *RegInfo = MF.getSubtarget().getRegisterInfo();
-  unsigned MaxAlign = getMaxAlignment();
+  Align MaxAlign = getMaxAlign();
   int64_t Offset = 0;
 
   // This code is very, very similar to PEI::calculateFrameObjectOffsets().
@@ -155,11 +155,11 @@ uint64_t MachineFrameInfo::estimateStackSize(const MachineFunction &MF) const {
     if (isDeadObjectIndex(i) || getStackID(i) != TargetStackID::Default)
       continue;
     Offset += getObjectSize(i);
-    unsigned Align = getObjectAlignment(i);
+    Align Alignment = getObjectAlign(i);
     // Adjust to alignment boundary
-    Offset = (Offset+Align-1)/Align*Align;
+    Offset = alignTo(Offset, Alignment);
 
-    MaxAlign = std::max(Align, MaxAlign);
+    MaxAlign = std::max(Alignment, MaxAlign);
   }
 
   if (adjustsStack() && TFI->hasReservedCallFrame(MF))
@@ -170,20 +170,17 @@ uint64_t MachineFrameInfo::estimateStackSize(const MachineFunction &MF) const {
   // ensure that the callee's frame or the alloca data is suitably aligned;
   // otherwise, for leaf functions, align to the TransientStackAlignment
   // value.
-  unsigned StackAlign;
+  Align StackAlign;
   if (adjustsStack() || hasVarSizedObjects() ||
       (RegInfo->needsStackRealignment(MF) && getObjectIndexEnd() != 0))
-    StackAlign = TFI->getStackAlignment();
+    StackAlign = TFI->getStackAlign();
   else
-    StackAlign = TFI->getTransientStackAlignment();
+    StackAlign = TFI->getTransientStackAlign();
 
   // If the frame pointer is eliminated, all frame offsets will be relative to
   // SP not FP. Align to MaxAlign so this works.
   StackAlign = std::max(StackAlign, MaxAlign);
-  unsigned AlignMask = StackAlign - 1;
-  Offset = (Offset + AlignMask) & ~uint64_t(AlignMask);
-
-  return (uint64_t)Offset;
+  return alignTo(Offset, StackAlign);
 }
 
 void MachineFrameInfo::computeMaxCallFrameSize(const MachineFunction &MF) {