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