| ; 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; |
| ; } |
| ; Check CFI instructions when LR is saved/restored to/from a register. |
| |
| @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 |
| %2 = load volatile i32, ptr @c, align 4 |
| %3 = load volatile i32, ptr @d, align 4 |
| %4 = load volatile i32, ptr @e, align 4 |
| %5 = load volatile i32, ptr @f, align 4 |
| %add = add i32 %0, 1 |
| %add1 = add i32 %add, %1 |
| %add2 = add i32 %add1, %2 |
| %add3 = add i32 %add2, %3 |
| %add4 = add i32 %add3, %4 |
| %add5 = add i32 %add4, %5 |
| ret i32 %add5 |
| } |
| ; CHECK-LABEL: x: |
| ; CHECK: mov r3, lr |
| ; CHECK-NEXT: .cfi_register lr, r3 |
| ; CHECK-NEXT: bl OUTLINED_FUNCTION_0 |
| ; CHECK-NEXT: mov lr, r3 |
| ; 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 |
| %2 = load volatile i32, ptr @c, align 4 |
| %3 = load volatile i32, ptr @d, align 4 |
| %4 = load volatile i32, ptr @e, align 4 |
| %5 = load volatile i32, ptr @f, align 4 |
| %add = add i32 %0, 2 |
| %add1 = add i32 %add, %1 |
| %add2 = add i32 %add1, %2 |
| %add3 = add i32 %add2, %3 |
| %add4 = add i32 %add3, %4 |
| %add5 = add i32 %add4, %5 |
| ret i32 %add5 |
| } |
| ; CHECK-LABEL: y: |
| ; CHECK: mov r3, lr |
| ; CHECK-NEXT: .cfi_register lr, r3 |
| ; CHECK-NEXT: bl OUTLINED_FUNCTION_0 |
| ; CHECK-NEXT: mov lr, r3 |
| ; CHECK-NEXT: .cfi_restore lr |
| |
| attributes #0 = { minsize nofree norecurse nounwind optsize } |