1 ; RUN: opt -S -mtriple=mips64-mti-linux-gnu -codegenprepare < %s | FileCheck %s
3 ; Test that if an address that was sunk from a dominating bb, used in a
4 ; select that is erased along with its' trivally dead operand, that the
5 ; sunken address is not reused if the same address computation occurs
6 ; after the select. Previously, this caused a ICE.
8 %struct.az = type { i32, %struct.bt* }
9 %struct.bt = type { i32 }
10 %struct.f = type { %struct.ax, %union.anon }
11 %struct.ax = type { %struct.az* }
12 %union.anon = type { %struct.bd }
13 %struct.bd = type { i64 }
14 %struct.bg = type { i32, i32 }
15 %struct.ap = type { i32, i32 }
17 @ch = common global %struct.f zeroinitializer, align 8
18 @j = common global %struct.az* null, align 8
19 @ck = common global i32 0, align 4
20 @h = common global i32 0, align 4
21 @.str = private unnamed_addr constant [1 x i8] zeroinitializer, align 1
23 define internal void @probestart() {
25 %0 = load %struct.az*, %struct.az** @j, align 8
26 %bw = getelementptr inbounds %struct.az, %struct.az* %0, i64 0, i32 1
27 %1 = load i32, i32* @h, align 4
28 %cond = icmp eq i32 %1, 0
29 br i1 %cond, label %sw.bb, label %cl
31 sw.bb: ; preds = %entry
32 %call = tail call inreg { i64, i64 } @ba(i32* bitcast (%struct.f* @ch to i32*))
35 cl: ; preds = %sw.bb, %entry
36 %2 = load %struct.bt*, %struct.bt** %bw, align 8
37 %tobool = icmp eq %struct.bt* %2, null
38 %3 = load i32, i32* @ck, align 4
39 %.sink5 = select i1 %tobool, i32* getelementptr (%struct.bg, %struct.bg* bitcast (%union.anon* getelementptr inbounds (%struct.f, %struct.f* @ch, i64 0, i32 1) to %struct.bg*), i64 0, i32 1), i32* getelementptr (%struct.ap, %struct.ap* bitcast (%union.anon* getelementptr inbounds (%struct.f, %struct.f* @ch, i64 0, i32 1) to %struct.ap*), i64 0, i32 1)
40 store i32 %3, i32* %.sink5, align 4
41 store i32 1, i32* bitcast (i64* getelementptr inbounds (%struct.f, %struct.f* @ch, i64 0, i32 1, i32 0, i32 0) to i32*), align 8
42 %4 = load %struct.bt*, %struct.bt** %bw, align 8
43 tail call void (i8*, ...) @a(i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0), %struct.bt* %4)
47 ; CHECK-LABEL: @probestart()
49 ; CHECK: %[[I0:[0-9]+]] = load %struct.az*, %struct.az** @j
52 ; CHECK-NOT: %{{[0-9]+}} = load %struct.bt*, %struct.bt** %bw
53 ; CHECK-NOT: %{{[.a-z0-9]}} = select
54 ; CHECK-NOT: %{{[0-9]+}} = load %struct.bt*, %struct.bt** %bw
56 ; CHECK: %[[I1:[0-9]+]] = bitcast %struct.az* %[[I0]] to i8*
57 ; CHECK-NEXT: %sunkaddr = getelementptr inbounds i8, i8* %[[I1]], i64 8
58 ; CHECK-NEXT: %[[I2:[0-9]+]] = bitcast i8* %sunkaddr to %struct.bt**
59 ; CHECK-NEXT: %{{[0-9]+}} = load %struct.bt*, %struct.bt** %[[I2]]
60 ; CHECK-NEXT: tail call void (i8*, ...) @a
62 declare inreg { i64, i64 } @ba(i32*)
64 declare void @a(i8*, ...)