Changes in directory llvm/lib/Support:
ConstantRange.cpp updated: 1.39 -> 1.40
---
Log message:
Implement unionWith.
---
Diffs of the changes: (+11 -2)
ConstantRange.cpp | 13 +++++++++++--
1 files changed, 11 insertions(+), 2 deletions(-)
Index: llvm/lib/Support/ConstantRange.cpp
diff -u llvm/lib/Support/ConstantRange.cpp:1.39
llvm/lib/Support/ConstantRange.cpp:1.40
--- llvm/lib/Support/ConstantRange.cpp:1.39 Thu Mar 1 01:54:15 2007
+++ llvm/lib/Support/ConstantRange.cpp Thu Mar 1 21:33:05 2007
@@ -194,9 +194,18 @@
assert(getBitWidth() == CR.getBitWidth() &&
"ConstantRange types don't agree!");
- assert(0 && "Range union not implemented yet!");
+ if ( isFullSet() || CR.isEmptySet()) return *this;
+ if (CR.isFullSet() || isEmptySet()) return CR;
- return *this;
+ APInt L = Lower, U = Upper;
+
+ if (!contains(CR.Lower))
+ L = APIntOps::umin(L, CR.Lower);
+
+ if (!contains(CR.Upper - 1))
+ U = APIntOps::umax(U, CR.Upper);
+
+ return ConstantRange(L, U);
}
/// zeroExtend - Return a new range in the specified integer type, which must
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