| ; RUN: opt < %s -jump-threading -S -verify | FileCheck %s |
| |
| target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| ; Verify that we do *not* thread any edge. We used to evaluate |
| ; constant expressions like: |
| ; |
| ; icmp ugt i8* null, inttoptr (i64 4 to i8*) |
| ; |
| ; as "true", causing jump threading to a wrong destination. |
| define void @foo(i8* %arg1, i8* %arg2) { |
| ; CHECK-LABEL: @foo |
| ; CHECK-NOT: bb_{{[^ ]*}}.thread: |
| entry: |
| %cmp1 = icmp eq i8* %arg1, null |
| br i1 %cmp1, label %bb_bar1, label %bb_end |
| |
| bb_bar1: |
| call void @bar(i32 1) |
| br label %bb_end |
| |
| bb_end: |
| %cmp2 = icmp ne i8* %arg2, null |
| br i1 %cmp2, label %bb_cont, label %bb_bar2 |
| |
| bb_bar2: |
| call void @bar(i32 2) |
| br label %bb_exit |
| |
| bb_cont: |
| %cmp3 = icmp ule i8* %arg1, inttoptr (i64 4 to i8*) |
| br i1 %cmp3, label %bb_exit, label %bb_bar3 |
| |
| bb_bar3: |
| call void @bar(i32 3) |
| br label %bb_exit |
| |
| bb_exit: |
| ret void |
| } |
| |
| declare void @bar(i32) |
