--- /dev/null
+; RUN: opt -S -instcombine < %s | FileCheck %s
+
+@c = common global i8 0, align 1
+@a = common global i8 0, align 1
+@b = common global i8 0, align 1
+
+define void @func() nounwind uwtable ssp {
+entry:
+ %0 = load i8* @c, align 1
+ %conv = zext i8 %0 to i32
+ %or = or i32 %conv, 1
+ %conv1 = trunc i32 %or to i8
+ store i8 %conv1, i8* @a, align 1
+ %conv2 = zext i8 %conv1 to i32
+ %neg = xor i32 %conv2, -1
+ %and = and i32 1, %neg
+ %conv3 = trunc i32 %and to i8
+ store i8 %conv3, i8* @b, align 1
+ %1 = load i8* @a, align 1
+ %conv4 = zext i8 %1 to i32
+ %conv5 = zext i8 %conv3 to i32
+ %tobool = icmp ne i32 %conv4, 0
+ br i1 %tobool, label %land.rhs, label %land.end
+
+land.rhs: ; preds = %entry
+ %tobool8 = icmp ne i32 %conv5, 0
+ br label %land.end
+
+land.end: ; preds = %land.rhs, %entry
+ %2 = phi i1 [ false, %entry ], [ %tobool8, %land.rhs ]
+ %land.ext = zext i1 %2 to i32
+ %mul = mul nsw i32 3, %land.ext
+ %conv9 = trunc i32 %mul to i8
+ store i8 %conv9, i8* @a, align 1
+ ret void
+
+; CHECK: @func
+; CHECK-NOT: select
+}