| ; RUN: llc --verify-machineinstrs --force-dwarf-frame-section %s -o - | FileCheck %s |
| target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64" |
| target triple = "thumbv7m-unknown-unknown-eabi" |
| |
| ; Derived from |
| ; volatile int a, b, c, d, e, f, g, h; |
| ; |
| ; int x() { |
| ; int r = (a + b) / (c + d) + e + f; |
| ; return r + 1; |
| ; } |
| ; |
| ; |
| ; int y() { |
| ; int r = (a + b) / (c + d) + e + f; |
| ; return r + 2; |
| ; } |
| ; Checks that CFI instruction are emitted around saves/restores of |
| ; the LR on stack. |
| |
| @a = dso_local global i32 0, align 4 |
| @b = dso_local global i32 0, align 4 |
| @c = dso_local global i32 0, align 4 |
| @d = dso_local global i32 0, align 4 |
| @e = dso_local global i32 0, align 4 |
| @f = dso_local global i32 0, align 4 |
| |
| define dso_local i32 @x() local_unnamed_addr #0 { |
| entry: |
| %0 = load volatile i32, ptr @a, align 4 |
| %1 = load volatile i32, ptr @b, align 4 |
| %add = add nsw i32 %1, %0 |
| %2 = load volatile i32, ptr @c, align 4 |
| %3 = load volatile i32, ptr @d, align 4 |
| %add1 = add nsw i32 %3, %2 |
| %div = sdiv i32 %add, %add1 |
| %4 = load volatile i32, ptr @e, align 4 |
| %5 = load volatile i32, ptr @f, align 4 |
| %add2 = add i32 %div, 1 |
| %add3 = add i32 %add2, %4 |
| %add4 = add i32 %add3, %5 |
| ret i32 %add4 |
| } |
| ; CHECK-LABEL: x: |
| ; CHECK: str lr, [sp, #-8]! |
| ; CHECK-NEXT: .cfi_def_cfa_offset 8 |
| ; CHECK-NEXT: .cfi_offset lr, -8 |
| ; CHECK-NEXT: bl OUTLINED_FUNCTION_0 |
| ; CHECK-NEXT: ldr lr, [sp], #8 |
| ; CHECK-NEXT: .cfi_def_cfa_offset 0 |
| ; CHECK-NEXT: .cfi_restore lr |
| |
| define dso_local i32 @y() local_unnamed_addr #0 { |
| entry: |
| %0 = load volatile i32, ptr @a, align 4 |
| %1 = load volatile i32, ptr @b, align 4 |
| %add = add nsw i32 %1, %0 |
| %2 = load volatile i32, ptr @c, align 4 |
| %3 = load volatile i32, ptr @d, align 4 |
| %add1 = add nsw i32 %3, %2 |
| %div = sdiv i32 %add, %add1 |
| %4 = load volatile i32, ptr @e, align 4 |
| %5 = load volatile i32, ptr @f, align 4 |
| %add2 = add i32 %div, 2 |
| %add3 = add i32 %add2, %4 |
| %add4 = add i32 %add3, %5 |
| ret i32 %add4 |
| } |
| ; CHECK-LABEL: y: |
| ; CHECK: str lr, [sp, #-8]! |
| ; CHECK-NEXT: .cfi_def_cfa_offset 8 |
| ; CHECK-NEXT: .cfi_offset lr, -8 |
| ; CHECK-NEXT: bl OUTLINED_FUNCTION_0 |
| ; CHECK-NEXT: ldr lr, [sp], #8 |
| ; CHECK-NEXT: .cfi_def_cfa_offset 0 |
| ; CHECK-NEXT: .cfi_restore lr |
| |
| attributes #0 = { minsize nofree norecurse nounwind optsize } |