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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 = "thumbv8m.main-none-none-eabi"
; int g(int);
;
; #if __ARM_FEATURE_CMSE == 3
; #define ENTRY __attribute__((cmse_nonsecure_entry))
; #else
; #define ENTRY
; #endif
;
; ENTRY int f(int x) {
; return 1 + g(x - 1);
; }
define hidden i32 @f0(i32 %x) local_unnamed_addr {
entry:
%sub = add nsw i32 %x, -1
%call = tail call i32 @g(i32 %sub)
%add = add nsw i32 %call, 1
ret i32 %add
}
; CHECK-LABEL: f0:
; CHECK: pac r12, lr, sp
; CHECK-NEXT: .save {r7, lr}
; CHECK-NEXT: push {r7, lr}
; CHECK-NEXT: .cfi_def_cfa_offset 8
; CHECK-NEXT: .cfi_offset lr, -4
; CHECK-NEXT: .cfi_offset r7, -8
; CHECK-NEXT: .save {ra_auth_code}
; CHECK-NEXT: str r12, [sp, #-4]!
; CHECK-NEXT: .cfi_def_cfa_offset 12
; CHECK-NEXT: .cfi_offset ra_auth_code, -12
; CHECK-NEXT: .pad #4
; CHECK-NEXT: sub sp, #4
; ...
; CHECK: add sp, #4
; CHECK-NEXT: ldr r12, [sp], #4
; CHECK-NEXT: pop.w {r7, lr}
; CHECK-NEXT: aut r12, lr, sp
; CHECK-NEXT: bx lr
define hidden i32 @f1(i32 %x) local_unnamed_addr #0 {
entry:
%sub = add nsw i32 %x, -1
%call = tail call i32 @g(i32 %sub)
%add = add nsw i32 %call, 1
ret i32 %add
}
; CHECK-LABEL: f1:
; CHECK: pac r12, lr, sp
; CHECK-NEXT: vstr fpcxtns, [sp, #-4]!
; CHECK-NEXT: .cfi_def_cfa_offset 4
; CHECK-NEXT: .save {r7, lr}
; CHECK-NEXT: push {r7, lr}
; CHECK: vldr fpcxtns, [sp], #4
; CHECK: aut r12, lr, sp
define hidden i32 @f2(i32 %x) local_unnamed_addr #1 {
entry:
%sub = add nsw i32 %x, -1
%call = tail call i32 @g(i32 %sub)
%add = add nsw i32 %call, 1
ret i32 %add
}
; CHECK-LABEL: f2:
; CHECK: pac r12, lr, sp
; CHECK-NEXT: .save {r7, lr}
; CHECK-NEXT: push {r7, lr}
; CHECK-NEXT: .cfi_def_cfa_offset 8
; CHECK-NEXT: .cfi_offset lr, -4
; CHECK-NEXT: .cfi_offset r7, -8
; CHECK-NEXT: .save {ra_auth_code}
; CHECK-NEXT: str r12, [sp, #-4]!
; CHECK-NEXT: .cfi_def_cfa_offset 12
; CHECK-NEXT: .cfi_offset ra_auth_code, -12
; CHECK-NEXT: .pad #4
; CHECK-NEXT: sub sp, #4
; CHECK-NEXT: .cfi_def_cfa_offset 16
; ...
; CHECK: add sp, #4
; CHECK-NEXT: ldr r12, [sp], #4
; CHECK-NEXT: pop.w {r7, lr}
; CHECK-NEXT: aut r12, lr, sp
; CHECK-NEXT: mrs r12, control
; ...
; CHECK: bxns lr
declare dso_local i32 @g(i32) local_unnamed_addr
attributes #0 = { "cmse_nonsecure_entry" "target-features"="+8msecext,+armv8.1-m.main"}
attributes #1 = { "cmse_nonsecure_entry" "target-features"="+8msecext,+armv8-m.main,+fp-armv8d16"}
!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: 0x0
; UNWIND: 0x00 ; vsp = vsp + 4
; UNWIND-NEXT: 0xB4 ; pop ra_auth_code
; UNWIND-NEXT: 0x84 0x08 ; pop {r7, lr}
; UNWIND-NEXT: 0xB0 ; finish
; UNWIND-NEXT: 0xB0 ; finish
; UNWIND-LABEL: FunctionAddress: 0x24
; UNWIND: 0xB4 ; pop ra_auth_code
; UNWIND-NEXT: 0x84 0x08 ; pop {r7, lr}
; UNWIND-LABEL: FunctionAddress: 0x54
; UNWIND: 0x00 ; vsp = vsp + 4
; UNWIND-NEXT: 0xB4 ; pop ra_auth_code
; UNWIND-NEXT: 0x84 0x08 ; pop {r7, lr}
; UNWIND-NEXT: 0xB0 ; finish
; UNWIND-NEXT: 0xB0 ; finish
; UNWIND-LABEL: 00000001 {{.*}} f0
; UNWIND-LABEL: 00000025 {{.*}} f1
; UNWIND-LABEL: 00000055 {{.*}} f2
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