Fix an error in ConstantRange::getSignedMax on wrapped ranges. Thanks once

again to Daniel Dunbar and KLEE!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75449 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 7 deletions

diff --git a/lib/Support/ConstantRange.cpp b/lib/Support/ConstantRange.cpp
index ca25491f62..4cb54bde1b 100644
--- a/lib/Support/ConstantRange.cpp
+++ b/lib/Support/ConstantRange.cpp
@@ -159,14 +159,10 @@ APInt ConstantRange::getSignedMax() const {
     else
       return SignedMax;
   } else {
-    if ((getUpper() - 1).slt(getLower())) {
-      if (getLower() != SignedMax)
-        return SignedMax;
-      else
-        return getUpper() - 1;
-    } else {
+    if (getLower().isNegative() == getUpper().isNegative())
+      return SignedMax;
+    else
       return getUpper() - 1;
-    }
   }
 }