| ; 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 } |
| attributes #1 = { nounwind } |
| |
| !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 |