1 ; RUN: opt < %s -globalopt -S | grep "phi.*@head" 2 ; PR3321 3 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" 4 target triple = "x86_64-unknown-linux-gnu" 5 %struct.node = type { %struct.node*, i32 } 6 @head = internal global %struct.node* null ; <%struct.node**> [#uses=2] 7 @node = internal global %struct.node { %struct.node* null, i32 42 }, align 16 ; <%struct.node*> [#uses=1] 8 9 define i32 @f() nounwind { 10 entry: 11 store %struct.node* @node, %struct.node** @head, align 8 12 br label %bb1 13 14 bb: ; preds = %bb1 15 %0 = getelementptr %struct.node* %t.0, i64 0, i32 1 ; <i32*> [#uses=1] 16 %1 = load i32* %0, align 4 ; <i32> [#uses=1] 17 %2 = getelementptr %struct.node* %t.0, i64 0, i32 0 ; <%struct.node**> [#uses=1] 18 br label %bb1 19 20 bb1: ; preds = %bb, %entry 21 %value.0 = phi i32 [ undef, %entry ], [ %1, %bb ] ; <i32> [#uses=1] 22 %t.0.in = phi %struct.node** [ @head, %entry ], [ %2, %bb ] ; <%struct.node**> [#uses=1] 23 %t.0 = load %struct.node** %t.0.in ; <%struct.node*> [#uses=3] 24 %3 = icmp eq %struct.node* %t.0, null ; <i1> [#uses=1] 25 br i1 %3, label %bb2, label %bb 26 27 bb2: ; preds = %bb1 28 ret i32 %value.0 29 } 30 31 define i32 @main() nounwind { 32 entry: 33 %0 = call i32 @f() nounwind ; <i32> [#uses=1] 34 ret i32 %0 35 } 36
