xref: /llvm-project/llvm/test/CodeGen/ARM/machine-outliner-cfi-1.ll (revision bed1c7f061aa12417aa081e334afdba45767b938) 
1; RUN: llc --verify-machineinstrs --force-dwarf-frame-section %s -o - | FileCheck %s
2target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
3target triple = "thumbv7m-unknown-unknown-eabi"
4
5; Derived from
6; volatile int a, b, c, d, e, f, g, h;
7;
8; int x() {
9;   int r = (a + b) / (c + d) + e + f;
10;   return r + 1;
11; }
12;
13;
14; int y() {
15;   int r = (a + b) / (c + d) + e + f;
16;   return r + 2;
17; }
18; Checks that CFI instruction are emitted around saves/restores of
19; the LR on stack.
20
21@a = dso_local global i32 0, align 4
22@b = dso_local global i32 0, align 4
23@c = dso_local global i32 0, align 4
24@d = dso_local global i32 0, align 4
25@e = dso_local global i32 0, align 4
26@f = dso_local global i32 0, align 4
27
28define dso_local i32 @x() local_unnamed_addr #0 {
29entry:
30  %0 = load volatile i32, ptr @a, align 4
31  %1 = load volatile i32, ptr @b, align 4
32  %add = add nsw i32 %1, %0
33  %2 = load volatile i32, ptr @c, align 4
34  %3 = load volatile i32, ptr @d, align 4
35  %add1 = add nsw i32 %3, %2
36  %div = sdiv i32 %add, %add1
37  %4 = load volatile i32, ptr @e, align 4
38  %5 = load volatile i32, ptr @f, align 4
39  %add2 = add i32 %div, 1
40  %add3 = add i32 %add2, %4
41  %add4 = add i32 %add3, %5
42  ret i32 %add4
43}
44; CHECK-LABEL: x:
45; CHECK:       str lr, [sp, #-8]!
46; CHECK-NEXT:  .cfi_def_cfa_offset 8
47; CHECK-NEXT:  .cfi_offset lr, -8
48; CHECK-NEXT:  bl  OUTLINED_FUNCTION_0
49; CHECK-NEXT:  ldr lr, [sp], #8
50; CHECK-NEXT:  .cfi_def_cfa_offset 0
51; CHECK-NEXT:  .cfi_restore lr
52
53define dso_local i32 @y() local_unnamed_addr #0 {
54entry:
55  %0 = load volatile i32, ptr @a, align 4
56  %1 = load volatile i32, ptr @b, align 4
57  %add = add nsw i32 %1, %0
58  %2 = load volatile i32, ptr @c, align 4
59  %3 = load volatile i32, ptr @d, align 4
60  %add1 = add nsw i32 %3, %2
61  %div = sdiv i32 %add, %add1
62  %4 = load volatile i32, ptr @e, align 4
63  %5 = load volatile i32, ptr @f, align 4
64  %add2 = add i32 %div, 2
65  %add3 = add i32 %add2, %4
66  %add4 = add i32 %add3, %5
67  ret i32 %add4
68}
69; CHECK-LABEL: y:
70; CHECK:       str lr, [sp, #-8]!
71; CHECK-NEXT:  .cfi_def_cfa_offset 8
72; CHECK-NEXT:  .cfi_offset lr, -8
73; CHECK-NEXT:  bl  OUTLINED_FUNCTION_0
74; CHECK-NEXT:  ldr lr, [sp], #8
75; CHECK-NEXT:  .cfi_def_cfa_offset 0
76; CHECK-NEXT:  .cfi_restore lr
77
78attributes #0 = { minsize nofree norecurse nounwind optsize }
79