; RUN: llc --force-dwarf-frame-section %s -o - | FileCheck %s
; RUN: llc --filetype=obj %s -o - | llvm-readelf --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 = "thumbv8.1m.main-arm-none-eabi"
; C++
; int g(int);
;
; int f(int n, ...) {
; __builtin_va_list ap;
; __builtin_va_start(ap, n);
; int s = 0;
; for (int i = 0; i < n; ++i)
; s += g(__builtin_va_arg(ap, int));
; __builtin_va_end(ap);
; return s;
; }
%"struct.std::__va_list" = type { ptr }
define hidden i32 @_Z1fiz(i32 %n, ...) local_unnamed_addr #0 {
entry:
%ap = alloca %"struct.std::__va_list", align 4
call void @llvm.va_start(ptr nonnull %ap)
%cmp7 = icmp sgt i32 %n, 0
br i1 %cmp7, label %for.body.lr.ph, label %for.cond.cleanup
for.body.lr.ph: ; preds = %entry
br label %for.body
for.cond.cleanup: ; preds = %for.body, %entry
%s.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ]
call void @llvm.va_end(ptr nonnull %ap)
ret i32 %s.0.lcssa
for.body: ; preds = %for.body.lr.ph, %for.body
%i.09 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
%s.08 = phi i32 [ 0, %for.body.lr.ph ], [ %add, %for.body ]
%argp.cur = load ptr, ptr %ap, align 4
%argp.next = getelementptr inbounds i8, ptr %argp.cur, i32 4
store ptr %argp.next, ptr %ap, align 4
%0 = load i32, ptr %argp.cur, align 4
%call = call i32 @_Z1gi(i32 %0)
%add = add nsw i32 %call, %s.08
%inc = add nuw nsw i32 %i.09, 1
%exitcond.not = icmp eq i32 %inc, %n
br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
}
; CHECK-LABEL: _Z1fiz:
; CHECK: pac r12, lr, sp
; CHECK-NEXT: .pad #12
; CHECK-NEXT: sub sp, #12
; CHECK-NEXT: .cfi_def_cfa_offset 12
; CHECK-NEXT: .save {r4, r5, r7, lr}
; CHECK-NEXT: push {r4, r5, r7, lr}
; CHECK-NEXT: .cfi_def_cfa_offset 28
; CHECK-NEXT: .cfi_offset lr, -16
; CHECK-NEXT: .cfi_offset r7, -20
; CHECK-NEXT: .cfi_offset r5, -24
; CHECK-NEXT: .cfi_offset r4, -28
; CHECK-NEXT: .save {ra_auth_code}
; CHECK-NEXT: str r12, [sp, #-4]!
; CHECK-NEXT: .cfi_def_cfa_offset 32
; CHECK-NEXT: .cfi_offset ra_auth_code, -32
; CHECK-NEXT: .pad #8
; CHECK-NEXT: sub sp, #8
; CHECK-NEXT: .cfi_def_cfa_offset 40
; ...
; CHECK: add r[[N:[0-9]*]], sp, #28
; CHECK: stm r[[N]]!, {r1, r2, r3}
; ...
; CHECK: add sp, #8
; CHECK-NEXT: ldr r12, [sp], #4
; CHECK-NEXT: pop.w {r4, r5, r7, lr}
; CHECK-NEXT: add sp, #12
; CHECK-NEXT: aut r12, lr, sp
; CHECK-NEXT: bx lr
declare void @llvm.va_start(ptr) #1
declare void @llvm.va_end(ptr) #1
declare dso_local i32 @_Z1gi(i32) local_unnamed_addr
attributes #0 = { optsize "sign-return-address"="non-leaf"}
attributes #1 = { nounwind "sign-return-address"="non-leaf"}
!llvm.module.flags = !{!0, !1, !2}
!0 = !{i32 8, !"branch-target-enforcement", i32 0}
!1 = !{i32 8, !"sign-return-address", i32 1}
!2 = !{i32 8, !"sign-return-address-all", i32 0}
; UNWIND-LABEL: FunctionAddress
; UNWIND: 0x01 ; vsp = vsp + 8
; UNWIND-NEXT: 0xB4 ; pop ra_auth_code
; UNWIND-NEXT: 0x84 0x0B ; pop {r4, r5, r7, lr}
; UNWIND-NEXT: 0x02 ; vsp = vsp + 12
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