From 90196fced249e2bfe693391022541b802a7b8aa7 Mon Sep 17 00:00:00 2001
From: Eli Friedman <eli.friedman@gmail.com>
Date: Wed, 12 Oct 2011 21:56:19 +0000
Subject: [PATCH] Fix APFloat::getSmallestNormalized so the shift doesn't
depend on undefined behavior. Patch from Ahmed Charles.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141818 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/Support/APFloat.cpp | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/Support/APFloat.cpp b/lib/Support/APFloat.cpp
index 95df8617fb5..f2388944929 100644
--- a/lib/Support/APFloat.cpp
+++ b/lib/Support/APFloat.cpp
@@ -3275,7 +3275,7 @@ APFloat APFloat::getSmallestNormalized(const fltSemantics &Sem, bool Negative) {
Val.exponent = Sem.minExponent;
Val.zeroSignificand();
Val.significandParts()[partCountForBits(Sem.precision)-1] |=
- (((integerPart) 1) << ((Sem.precision % integerPartWidth) - 1));
+ (((integerPart) 1) << ((Sem.precision - 1) % integerPartWidth));
return Val;
}