Fix APInt::operator*= so that it computes the correct result for large integers where there is unsigned overflow. Fix APFloat::toString so that it doesn't depend on the incorrect behavior in common cases (and computes the correct result in some rare cases). Fixes PR11086.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141441 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 0 deletions

diff --git a/unittests/ADT/APIntTest.cpp b/unittests/ADT/APIntTest.cpp
index 11bb5e1545..490811deb8 100644
--- a/unittests/ADT/APIntTest.cpp
+++ b/unittests/ADT/APIntTest.cpp
@@ -441,4 +441,13 @@ TEST(APIntTest, StringDeath) {
 #endif
 #endif
 
+TEST(APIntTest, mul_clear) {
+  APInt ValA(65, -1ULL);
+  APInt ValB(65, 4);
+  APInt ValC(65, 0);
+  ValC = ValA * ValB;
+  ValA *= ValB;
+  EXPECT_EQ(ValA.toString(10, false), ValC.toString(10, false));
+}
+
 }