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; 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 }
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