| ; RUN: opt < %s -passes=globalopt -S | FileCheck %s |
| ; CHECK: phi{{.*}}@head |
| ; PR3321 |
| 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" |
| target triple = "x86_64-unknown-linux-gnu" |
| %struct.node = type { ptr, i32 } |
| @head = internal global ptr null ; <ptr> [#uses=2] |
| @node = internal global %struct.node { ptr null, i32 42 }, align 16 ; <ptr> [#uses=1] |
| |
| define i32 @f() nounwind { |
| entry: |
| store ptr @node, ptr @head, align 8 |
| br label %bb1 |
| |
| bb: ; preds = %bb1 |
| %0 = getelementptr %struct.node, ptr %t.0, i64 0, i32 1 ; <ptr> [#uses=1] |
| %1 = load i32, ptr %0, align 4 ; <i32> [#uses=1] |
| %2 = getelementptr %struct.node, ptr %t.0, i64 0, i32 0 ; <ptr> [#uses=1] |
| br label %bb1 |
| |
| bb1: ; preds = %bb, %entry |
| %value.0 = phi i32 [ undef, %entry ], [ %1, %bb ] ; <i32> [#uses=1] |
| %t.0.in = phi ptr [ @head, %entry ], [ %2, %bb ] ; <ptr> [#uses=1] |
| %t.0 = load ptr, ptr %t.0.in ; <ptr> [#uses=3] |
| %3 = icmp eq ptr %t.0, null ; <i1> [#uses=1] |
| br i1 %3, label %bb2, label %bb |
| |
| bb2: ; preds = %bb1 |
| ret i32 %value.0 |
| } |
| |
| define i32 @main() nounwind { |
| entry: |
| %0 = call i32 @f() nounwind ; <i32> [#uses=1] |
| ret i32 %0 |
| } |
