; RUN: llc --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 = "thumbv8.1m.main-arm-none-eabi"
; int g(int, int *);
;
; int f(int n) {
; int a[n];
; g(n, a);
; int s = 0;
; for (int i = 0; i < n; ++i)
; s += a[i];
; return s;
; }
define hidden i32 @f(i32 %n) local_unnamed_addr #0 {
entry:
%vla = alloca i32, i32 %n, align 4
%call = call i32 @g(i32 %n, ptr nonnull %vla) #0
%cmp8 = icmp sgt i32 %n, 0
br i1 %cmp8, label %for.body.preheader, label %for.cond.cleanup
for.body.preheader: ; preds = %entry
%0 = add i32 %n, -1
%xtraiter = and i32 %n, 3
%1 = icmp ult i32 %0, 3
br i1 %1, label %for.cond.cleanup.loopexit.unr-lcssa, label %for.body.preheader.new
for.body.preheader.new: ; preds = %for.body.preheader
%unroll_iter = and i32 %n, -4
br label %for.body
for.cond.cleanup.loopexit.unr-lcssa: ; preds = %for.body, %for.body.preheader
%add.lcssa.ph = phi i32 [ undef, %for.body.preheader ], [ %add.3, %for.body ]
%i.010.unr = phi i32 [ 0, %for.body.preheader ], [ %inc.3, %for.body ]
%s.09.unr = phi i32 [ 0, %for.body.preheader ], [ %add.3, %for.body ]
%lcmp.mod.not = icmp eq i32 %xtraiter, 0
br i1 %lcmp.mod.not, label %for.cond.cleanup, label %for.body.epil
for.body.epil: ; preds = %for.cond.cleanup.loopexit.unr-lcssa
%arrayidx.epil = getelementptr inbounds i32, ptr %vla, i32 %i.010.unr
%2 = load i32, ptr %arrayidx.epil, align 4
%add.epil = add nsw i32 %2, %s.09.unr
%epil.iter.cmp.not = icmp eq i32 %xtraiter, 1
br i1 %epil.iter.cmp.not, label %for.cond.cleanup, label %for.body.epil.1
for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit.unr-lcssa, %for.body.epil.2, %for.body.epil.1, %for.body.epil, %entry
%s.0.lcssa = phi i32 [ 0, %entry ], [ %add.lcssa.ph, %for.cond.cleanup.loopexit.unr-lcssa ], [ %add.epil, %for.body.epil ], [ %add.epil.1, %for.body.epil.1 ], [ %add.epil.2, %for.body.epil.2 ]
ret i32 %s.0.lcssa
for.body: ; preds = %for.body, %for.body.preheader.new
%i.010 = phi i32 [ 0, %for.body.preheader.new ], [ %inc.3, %for.body ]
%s.09 = phi i32 [ 0, %for.body.preheader.new ], [ %add.3, %for.body ]
%niter = phi i32 [ %unroll_iter, %for.body.preheader.new ], [ %niter.nsub.3, %for.body ]
%arrayidx = getelementptr inbounds i32, ptr %vla, i32 %i.010
%3 = load i32, ptr %arrayidx, align 4
%add = add nsw i32 %3, %s.09
%inc = or disjoint i32 %i.010, 1
%arrayidx.1 = getelementptr inbounds i32, ptr %vla, i32 %inc
%4 = load i32, ptr %arrayidx.1, align 4
%add.1 = add nsw i32 %4, %add
%inc.1 = or disjoint i32 %i.010, 2
%arrayidx.2 = getelementptr inbounds i32, ptr %vla, i32 %inc.1
%5 = load i32, ptr %arrayidx.2, align 4
%add.2 = add nsw i32 %5, %add.1
%inc.2 = or disjoint i32 %i.010, 3
%arrayidx.3 = getelementptr inbounds i32, ptr %vla, i32 %inc.2
%6 = load i32, ptr %arrayidx.3, align 4
%add.3 = add nsw i32 %6, %add.2
%inc.3 = add nuw nsw i32 %i.010, 4
%niter.nsub.3 = add i32 %niter, -4
%niter.ncmp.3 = icmp eq i32 %niter.nsub.3, 0
br i1 %niter.ncmp.3, label %for.cond.cleanup.loopexit.unr-lcssa, label %for.body
for.body.epil.1: ; preds = %for.body.epil
%inc.epil = add nuw nsw i32 %i.010.unr, 1
%arrayidx.epil.1 = getelementptr inbounds i32, ptr %vla, i32 %inc.epil
%7 = load i32, ptr %arrayidx.epil.1, align 4
%add.epil.1 = add nsw i32 %7, %add.epil
%epil.iter.cmp.1.not = icmp eq i32 %xtraiter, 2
br i1 %epil.iter.cmp.1.not, label %for.cond.cleanup, label %for.body.epil.2
for.body.epil.2: ; preds = %for.body.epil.1
%inc.epil.1 = add nuw nsw i32 %i.010.unr, 2
%arrayidx.epil.2 = getelementptr inbounds i32, ptr %vla, i32 %inc.epil.1
%8 = load i32, ptr %arrayidx.epil.2, align 4
%add.epil.2 = add nsw i32 %8, %add.epil.1
br label %for.cond.cleanup
}
; CHECK-LABEL: f:
; CHECK: pac r12, lr, sp
; CHECK-NEXT: .save {r4, r5, r6, r7, lr}
; CHECK-NEXT: push {r4, r5, r6, r7, lr}
; CHECK-NEXT: .cfi_def_cfa_offset 20
; CHECK-NEXT: .cfi_offset lr, -4
; CHECK-NEXT: .cfi_offset r7, -8
; CHECK-NEXT: .cfi_offset r6, -12
; CHECK-NEXT: .cfi_offset r5, -16
; CHECK-NEXT: .cfi_offset r4, -20
; CHECK-NEXT: .setfp r7, sp, #12
; CHECK-NEXT: add r7, sp, #12
; CHECK-NEXT: .cfi_def_cfa r7, 8
; CHECK-NEXT: .save {r8, r9, ra_auth_code}
; CHECK-NEXT: push.w {r8, r9, r12}
; CHECK-NEXT: .cfi_offset ra_auth_code, -24
; CHECK-NEXT: .cfi_offset r9, -28
; CHECK-NEXT: .cfi_offset r8, -32
; ...
; CHECK: sub.w r[[N:[0-9]*]], r7, #24
; CHECK-NEXT: mov sp, r[[N]]
; CHECK-NEXT: pop.w {r8, r9, r12}
; CHECK-NEXT: pop.w {r4, r5, r6, r7, lr}
; CHECK-NEXT: aut r12, lr, sp
; CHECK-NEXT: bx lr
declare dso_local i32 @g(i32, ptr) local_unnamed_addr #0
attributes #0 = { 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}
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