1 ; RUN: opt -S -instcombine < %s | FileCheck %s 2 3 @c = common global i8 0, align 1 4 @a = common global i8 0, align 1 5 @b = common global i8 0, align 1 6 7 define void @func() nounwind uwtable ssp { 8 entry: 9 %0 = load i8, i8* @c, align 1 10 %conv = zext i8 %0 to i32 11 %or = or i32 %conv, 1 12 %conv1 = trunc i32 %or to i8 13 store i8 %conv1, i8* @a, align 1 14 %conv2 = zext i8 %conv1 to i32 15 %neg = xor i32 %conv2, -1 16 %and = and i32 1, %neg 17 %conv3 = trunc i32 %and to i8 18 store i8 %conv3, i8* @b, align 1 19 %1 = load i8, i8* @a, align 1 20 %conv4 = zext i8 %1 to i32 21 %conv5 = zext i8 %conv3 to i32 22 %tobool = icmp ne i32 %conv4, 0 23 br i1 %tobool, label %land.rhs, label %land.end 24 25 land.rhs: ; preds = %entry 26 %tobool8 = icmp ne i32 %conv5, 0 27 br label %land.end 28 29 land.end: ; preds = %land.rhs, %entry 30 %2 = phi i1 [ false, %entry ], [ %tobool8, %land.rhs ] 31 %land.ext = zext i1 %2 to i32 32 %mul = mul nsw i32 3, %land.ext 33 %conv9 = trunc i32 %mul to i8 34 store i8 %conv9, i8* @a, align 1 35 ret void 36 37 ; CHECK-LABEL: @func( 38 ; CHECK-NOT: select 39 } 40
