[Alignment] Use llvm::Align in MachineFunction and TargetLowering - fixes mir parsing

Summary:
This catches malformed mir files which specify alignment as log2 instead of pow2.
See https://reviews.llvm.org/D65945 for reference,

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: MatzeB, qcolombet, dschuff, arsenm, sdardis, nemanjai, jvesely, nhaehnle, hiraditya, kbarton, asb, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, jrtc27, MaskRay, zzheng, edward-jones, atanasyan, rogfer01, MartinMosbeck, brucehoult, the_o, PkmX, jocewei, jsji, Petar.Avramovic, asbirlea, s.egerton, pzheng, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D67433

llvm-svn: 371608

1 files changed, 4 insertions, 4 deletions

diff --git a/llvm/lib/CodeGen/MachineFunction.cpp b/llvm/lib/CodeGen/MachineFunction.cpp
index d136ebd437f..832895e2c92 100644
--- a/llvm/lib/CodeGen/MachineFunction.cpp
+++ b/llvm/lib/CodeGen/MachineFunction.cpp
@@ -173,16 +173,16 @@ void MachineFunction::init() {
     FrameInfo->ensureMaxAlignment(F.getFnStackAlignment());
 
   ConstantPool = new (Allocator) MachineConstantPool(getDataLayout());
-  LogAlignment = STI->getTargetLowering()->getMinFunctionLogAlignment();
+  Alignment = STI->getTargetLowering()->getMinFunctionAlignment();
 
   // FIXME: Shouldn't use pref alignment if explicit alignment is set on F.
   // FIXME: Use Function::hasOptSize().
   if (!F.hasFnAttribute(Attribute::OptimizeForSize))
-    LogAlignment = std::max(
-        LogAlignment, STI->getTargetLowering()->getPrefFunctionLogAlignment());
+    Alignment = std::max(Alignment,
+                         STI->getTargetLowering()->getPrefFunctionAlignment());
 
   if (AlignAllFunctions)
-    LogAlignment = AlignAllFunctions;
+    Alignment = llvm::Align(1ULL << AlignAllFunctions);
 
   JumpTableInfo = nullptr;