[SVE][IR] Scalable Vector size queries and IR instruction support

* Adds a TypeSize struct to represent the known minimum size of a type
  along with a flag to indicate that the runtime size is a integer multiple
  of that size
* Converts existing size query functions from Type.h and DataLayout.h to
  return a TypeSize result
* Adds convenience methods (including a transparent conversion operator
  to uint64_t) so that most existing code 'just works' as if the return
  values were still scalars.
* Uses the new size queries along with ElementCount to ensure that all
  supported instructions used with scalable vectors can be constructed
  in IR.

Reviewers: hfinkel, lattner, rkruppe, greened, rovka, rengolin, sdesmalen

Reviewed By: rovka, sdesmalen

Differential Revision: https://reviews.llvm.org/D53137

llvm-svn: 374042

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/lib/Analysis/InlineCost.cpp b/llvm/lib/Analysis/InlineCost.cpp
index 57dee459fc2..89811ec0e37 100644
--- a/llvm/lib/Analysis/InlineCost.cpp
+++ b/llvm/lib/Analysis/InlineCost.cpp
@@ -436,7 +436,8 @@ bool CallAnalyzer::visitAlloca(AllocaInst &I) {
     if (auto *AllocSize = dyn_cast_or_null<ConstantInt>(Size)) {
       Type *Ty = I.getAllocatedType();
       AllocatedSize = SaturatingMultiplyAdd(
-          AllocSize->getLimitedValue(), DL.getTypeAllocSize(Ty), AllocatedSize);
+          AllocSize->getLimitedValue(), DL.getTypeAllocSize(Ty).getFixedSize(),
+          AllocatedSize);
       return Base::visitAlloca(I);
     }
   }
@@ -444,7 +445,8 @@ bool CallAnalyzer::visitAlloca(AllocaInst &I) {
   // Accumulate the allocated size.
   if (I.isStaticAlloca()) {
     Type *Ty = I.getAllocatedType();
-    AllocatedSize = SaturatingAdd(DL.getTypeAllocSize(Ty), AllocatedSize);
+    AllocatedSize = SaturatingAdd(DL.getTypeAllocSize(Ty).getFixedSize(),
+                                  AllocatedSize);
   }
 
   // We will happily inline static alloca instructions.