1; RUN: opt < %s -indvars -S | FileCheck %s
2target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
3target triple = "i386-apple-darwin10.0"
4
5; PR4775
6; Indvars shouldn't sink the alloca out of the entry block, even though
7; it's not used until after the loop.
8define i32 @main() nounwind {
9; CHECK: entry:
10; CHECK-NEXT: %result.i = alloca i32, align 4
11entry:
12  %result.i = alloca i32, align 4                 ; <i32*> [#uses=2]
13  br label %while.cond
14
15while.cond:                                       ; preds = %while.cond, %entry
16  %call = call i32 @bar() nounwind                ; <i32> [#uses=1]
17  %tobool = icmp eq i32 %call, 0                  ; <i1> [#uses=1]
18  br i1 %tobool, label %while.end, label %while.cond
19
20while.end:                                        ; preds = %while.cond
21  store volatile i32 0, i32* %result.i
22  %tmp.i = load volatile i32* %result.i           ; <i32> [#uses=0]
23  ret i32 0
24}
25declare i32 @bar()
26
27; <rdar://problem/10352360>
28; Indvars shouldn't sink the first alloca between the stacksave and stackrestore
29; intrinsics.
30declare i8* @a(...)
31declare i8* @llvm.stacksave() nounwind
32declare void @llvm.stackrestore(i8*) nounwind
33define void @h(i64 %n) nounwind uwtable ssp {
34; CHECK: entry:
35; CHECK-NEXT: %vla = alloca i8*
36; CHECK-NEXT: %savedstack = call i8* @llvm.stacksave()
37entry:
38  %vla = alloca i8*, i64 %n, align 16
39  %savedstack = call i8* @llvm.stacksave() nounwind
40  %vla.i = alloca i8*, i64 %n, align 16
41  br label %for.body.i
42
43for.body.i:
44  %indvars.iv37.i = phi i64 [ %indvars.iv.next38.i, %for.body.i ], [ 0, %entry ]
45  %call.i = call i8* (...)* @a() nounwind
46  %arrayidx.i = getelementptr inbounds i8** %vla.i, i64 %indvars.iv37.i
47  store i8* %call.i, i8** %arrayidx.i, align 8
48  %indvars.iv.next38.i = add i64 %indvars.iv37.i, 1
49  %exitcond5 = icmp eq i64 %indvars.iv.next38.i, %n
50  br i1 %exitcond5, label %g.exit, label %for.body.i
51
52g.exit:
53  call void @llvm.stackrestore(i8* %savedstack) nounwind
54  %call1 = call i8* (...)* @a(i8** %vla) nounwind
55  ret void
56}
57