| ; 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, 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, 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-LABEL: @func( |
| ; CHECK-NOT: select |
| } |
