1 ; RUN: opt -instcombine -S <%s | FileCheck %s
3 ; Make sure the PHI node gets put in a place where all of its operands dominate it
4 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"
5 target triple = "x86_64-unknown-linux-gnu"
7 @tmp2 = global i64 0 ; <i64*> [#uses=1]
9 declare void @use(i64) nounwind
11 define void @foo(i1) nounwind align 2 {
13 br i1 %0, label %2, label %3
15 ; <label>:2 ; preds = %1
18 ; <label>:3 ; preds = %2, %1
20 ; CHECK-NEXT: %v4 = phi i1 [ false, %2 ], [ true, %1 ]
21 ; CHECK-NEXT: %v4_ = phi i1 [ true, %2 ], [ false, %1 ]
22 ; CHECK-NEXT: br label %l8
23 %v4 = phi i8 [ 1, %2 ], [ 0, %1 ] ; <i8> [#uses=1]
24 %v4_ = phi i8 [ 0, %2 ], [ 1, %1 ] ; <i8> [#uses=1]
25 %v5 = icmp eq i8 %v4, 0 ; <i1> [#uses=1]
26 %v5_ = icmp eq i8 %v4_, 0 ; <i1> [#uses=1]
27 %v6 = load i64* @tmp2, align 8 ; <i64> [#uses=1]
28 %v7 = select i1 %v5, i64 0, i64 %v6 ; <i64> [#uses=1]
32 %v9 = load i64* @tmp2, align 8
33 call void @use(i64 %v7)
36 %v11 = select i1 %v5_, i64 0, i64 %v9 ; <i64> [#uses=1]
37 call void @use(i64 %v11)
40 %v12 = load i64* @tmp2, align 8
41 %v13 = select i1 %v5_, i64 0, i64 %v12 ; <i64> [#uses=1]
42 call void @use(i64 %v13)
43 br i1 %0, label %l12, label %l13
48 ;CHECK-NEXT: %v14 = phi i64 [ %v12, %l12 ], [ 0, %l11 ]
49 ;CHECK-NEXT: call void @use(i64 %v14)
50 %v14 = phi i1 [0, %l12], [1, %l11]
51 %v16 = select i1 %v14, i64 0, i64 %v12 ; <i64> [#uses=1]
52 call void @use(i64 %v16)