| ; RUN: opt < %s -loop-unswitch -disable-output |
| ; PR12887 |
| target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| @a = common global i32 0, align 4 |
| @c = common global i32 0, align 4 |
| @b = common global i32 0, align 4 |
| |
| define void @func() noreturn nounwind uwtable { |
| entry: |
| %0 = load i32, i32* @a, align 4 |
| %tobool = icmp eq i32 %0, 0 |
| %1 = load i32, i32* @b, align 4 |
| br label %while.body |
| |
| while.body: ; preds = %while.body, %entry |
| %d.0 = phi i8 [ undef, %entry ], [ %conv2, %while.body ] |
| %conv = sext i8 %d.0 to i32 |
| %cond = select i1 %tobool, i32 0, i32 %conv |
| %conv11 = zext i8 %d.0 to i32 |
| %add = add i32 %1, %conv11 |
| %conv2 = trunc i32 %add to i8 |
| br label %while.body |
| } |
