vendor/llvm/llvm-trunk-r306325

1 files changed, 13 insertions, 17 deletions

diff --git a/lib/IR/ConstantRange.cpp b/lib/IR/ConstantRange.cpp
index 21d1996ef851..4bd17257016d 100644
--- a/lib/IR/ConstantRange.cpp
+++ b/lib/IR/ConstantRange.cpp
@@ -1,4 +1,4 @@
-//===-- ConstantRange.cpp - ConstantRange implementation ------------------===//
+//===- ConstantRange.cpp - ConstantRange implementation -------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -21,12 +21,21 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/ADT/APInt.h"
 #include "llvm/IR/ConstantRange.h"
+#include "llvm/IR/Constants.h"
 #include "llvm/IR/InstrTypes.h"
 #include "llvm/IR/Instruction.h"
+#include "llvm/IR/Metadata.h"
 #include "llvm/IR/Operator.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"
+#include <algorithm>
+#include <cassert>
+#include <cstdint>
+
 using namespace llvm;
 
 ConstantRange::ConstantRange(uint32_t BitWidth, bool Full)
@@ -170,7 +179,7 @@ ConstantRange
 ConstantRange::makeGuaranteedNoWrapRegion(Instruction::BinaryOps BinOp,
                                           const ConstantRange &Other,
                                           unsigned NoWrapKind) {
-  typedef OverflowingBinaryOperator OBO;
+  using OBO = OverflowingBinaryOperator;
 
   // Computes the intersection of CR0 and CR1.  It is different from
   // intersectWith in that the ConstantRange returned will only contain elements
@@ -284,27 +293,14 @@ APInt ConstantRange::getUnsignedMin() const {
 }
 
 APInt ConstantRange::getSignedMax() const {
-  if (!isWrappedSet()) {
-    APInt UpperMinusOne = getUpper() - 1;
-    if (getLower().sle(UpperMinusOne))
-      return UpperMinusOne;
-    return APInt::getSignedMaxValue(getBitWidth());
-  }
-  if (getLower().isNegative() == getUpper().isNegative())
+  if (isFullSet() || Lower.sgt(Upper))
     return APInt::getSignedMaxValue(getBitWidth());
   return getUpper() - 1;
 }
 
 APInt ConstantRange::getSignedMin() const {
-  if (!isWrappedSet()) {
-    if (getLower().sle(getUpper() - 1))
-      return getLower();
+  if (isFullSet() || (Lower.sgt(Upper) && !getUpper().isMinSignedValue()))
     return APInt::getSignedMinValue(getBitWidth());
-  }
-  if ((getUpper() - 1).slt(getLower())) {
-    if (!getUpper().isMinSignedValue())
-      return APInt::getSignedMinValue(getBitWidth());
-  }
   return getLower();
 }