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; RUN: llc --force-dwarf-frame-section %s -o - | FileCheck %s
; RUN: llc --filetype=obj %s -o - | llvm-readelf -s --unwind - | FileCheck %s --check-prefix=UNWIND
target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "thumbv7m-arm-none-eabi"
; -Oz
; __attribute__((noinline)) int h(int a, int b) { return a + b; }
;
; int f(int a, int b, int c, int d) {
; if (a < 0)
; return -1;
; a = h(11 * a - b, b);
; return 2 + a * (a + b) / (c + d);
; }
;
; int g(int a, int b, int c, int d) {
; if (a < 0)
; return -1;
; a = h(11 * a - b, b);
; return 1 + a * (a + b) / (c + d);
; }
define hidden i32 @h(i32 %a, i32 %b) local_unnamed_addr #0 {
entry:
%add = add nsw i32 %b, %a
ret i32 %add
}
define hidden i32 @f(i32 %a, i32 %b, i32 %c, i32 %d) local_unnamed_addr #0 {
entry:
%cmp = icmp slt i32 %a, 0
br i1 %cmp, label %return, label %if.end
if.end: ; preds = %entry
%mul = mul nsw i32 %a, 11
%sub = sub nsw i32 %mul, %b
%call = tail call i32 @h(i32 %sub, i32 %b)
%add = add nsw i32 %call, %b
%mul1 = mul nsw i32 %add, %call
%add2 = add nsw i32 %d, %c
%div = sdiv i32 %mul1, %add2
%add3 = add nsw i32 %div, 2
br label %return
return: ; preds = %entry, %if.end
%retval.0 = phi i32 [ %add3, %if.end ], [ -1, %entry ]
ret i32 %retval.0
}
; CHECK-LABEL: f:
; ...
; CHECK: pac r12, lr, sp
; CHECK-NEXT: .save {r4, r5, r6, lr}
; CHECK-NEXT: push {r4, r5, r6, lr}
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset lr, -4
; CHECK-NEXT: .cfi_offset r6, -8
; CHECK-NEXT: .cfi_offset r5, -12
; CHECK-NEXT: .cfi_offset r4, -16
; CHECK-NEXT: .save {ra_auth_code}
; CHECK-NEXT: str r12, [sp, #-4]!
; CHECK-NEXT: .cfi_def_cfa_offset 20
; CHECK-NEXT: .cfi_offset ra_auth_code, -20
; CHECK-NEXT: .pad #4
; CHECK-NEXT: sub sp, #4
; CHECK-NEXT: .cfi_def_cfa_offset 24
; ...
; CHECK: bl OUTLINED_FUNCTION_0
; ...
; CHECK: add sp, #4
; CHECK-NEXT: ldr r12, [sp], #4
; CHECK-NEXT: pop.w {r4, r5, r6, lr}
; CHECK-NEXT: aut r12, lr, sp
; CHECK-NEXT: bx lr
define hidden i32 @g(i32 %a, i32 %b, i32 %c, i32 %d) local_unnamed_addr #0 {
entry:
%cmp = icmp slt i32 %a, 0
br i1 %cmp, label %return, label %if.end
if.end: ; preds = %entry
%mul = mul nsw i32 %a, 11
%sub = sub nsw i32 %mul, %b
%call = tail call i32 @h(i32 %sub, i32 %b)
%add = add nsw i32 %call, %b
%mul1 = mul nsw i32 %add, %call
%add2 = add nsw i32 %d, %c
%div = sdiv i32 %mul1, %add2
%add3 = add nsw i32 %div, 1
br label %return
return: ; preds = %entry, %if.end
%retval.0 = phi i32 [ %add3, %if.end ], [ -1, %entry ]
ret i32 %retval.0
}
; CHECK-LABEL: g:
; CHECK: pac r12, lr, sp
; CHECK-NEXT: .save {r4, r5, r6, lr}
; CHECK-NEXT: push {r4, r5, r6, lr}
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset lr, -4
; CHECK-NEXT: .cfi_offset r6, -8
; CHECK-NEXT: .cfi_offset r5, -12
; CHECK-NEXT: .cfi_offset r4, -16
; CHECK-NEXT: .save {ra_auth_code}
; CHECK-NEXT: str r12, [sp, #-4]!
; CHECK-NEXT: .cfi_def_cfa_offset 20
; CHECK-NEXT: .cfi_offset ra_auth_code, -20
; CHECK-NEXT: .pad #4
; CHECK-NEXT: sub sp, #4
; CHECK-NEXT: .cfi_def_cfa_offset 24
; ...
; CHECK: bl OUTLINED_FUNCTION_0
; ...
; CHECK: add sp, #4
; CHECK-NEXT: ldr r12, [sp], #4
; CHECK-NEXT: pop.w {r4, r5, r6, lr}
; CHECK-NEXT: aut r12, lr, sp
; CHECK-NEXT: bx lr
; CHECK-LABEL: OUTLINED_FUNCTION_0:
; CHECK: pac r12, lr, sp
; CHECK-NEXT: .save {ra_auth_code, lr}
; CHECK-NEXT: strd r12, lr, [sp, #-8]!
; CHECK-NEXT: .cfi_def_cfa_offset 8
; CHECK-NEXT: .cfi_offset lr, -4
; CHECK-NEXT: .cfi_offset ra_auth_code, -8
; ...
; CHECK: ldrd r12, lr, [sp], #8
; CHECK-NEXT: .cfi_def_cfa_offset 0
; CHECK-NEXT: .cfi_restore lr
; CHECK-NEXT: .cfi_undefined ra_auth_code
; CHECK-NEXT: aut r12, lr, sp
; CHECK-NEXT: bx lr
attributes #0 = { minsize noinline norecurse nounwind optsize readnone uwtable }
!llvm.module.flags = !{!0, !1, !2}
!0 = !{i32 1, !"branch-target-enforcement", i32 0}
!1 = !{i32 1, !"sign-return-address", i32 1}
!2 = !{i32 1, !"sign-return-address-all", i32 0}
; UNWIND-LABEL: FunctionAddress: 0x4
; UNWIND: 0x00 ; vsp = vsp + 4
; UNWIND-NEXT: 0xB4 ; pop ra_auth_code
; UNWIND-NEXT: 0xAA ; pop {r4, r5, r6, lr}
; UNWIND-LABEL: FunctionAddress: 0x30
; UNWIND: 0x00 ; vsp = vsp + 4
; UNWIND-NEXT: 0xB4 ; pop ra_auth_code
; UNWIND-NEXT: 0xAA ; pop {r4, r5, r6, lr}
; UNWIND-LABEL: FunctionAddress: 0x5C
; UNWIND: Model: CantUnwind
; UNWIND-LABEL: 0000005d {{.*}} OUTLINED_FUNCTION_0
; UNWIND-LABEL: 00000005 {{.*}} f
; UNWIND-LABEL: 00000031 {{.*}} g
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