125 lines
3.6 KiB
LLVM
125 lines
3.6 KiB
LLVM
; RUN: llc --force-dwarf-frame-section %s -o - | FileCheck %s
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; RUN: llc --filetype=obj %s -o - | llvm-readelf -s --unwind - | FileCheck %s --check-prefix=UNWIND
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target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "thumbv8m.main-none-none-eabi"
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; int g(int);
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;
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; #if __ARM_FEATURE_CMSE == 3
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; #define ENTRY __attribute__((cmse_nonsecure_entry))
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; #else
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; #define ENTRY
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; #endif
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;
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; ENTRY int f(int x) {
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; return 1 + g(x - 1);
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; }
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define hidden i32 @f0(i32 %x) local_unnamed_addr {
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entry:
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%sub = add nsw i32 %x, -1
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%call = tail call i32 @g(i32 %sub)
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%add = add nsw i32 %call, 1
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ret i32 %add
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}
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; CHECK-LABEL: f0:
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; CHECK: pac r12, lr, sp
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; CHECK-NEXT: .save {r7, lr}
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; CHECK-NEXT: push {r7, lr}
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: .cfi_offset lr, -4
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; CHECK-NEXT: .cfi_offset r7, -8
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; CHECK-NEXT: .save {ra_auth_code}
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; CHECK-NEXT: str r12, [sp, #-4]!
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; CHECK-NEXT: .cfi_def_cfa_offset 12
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; CHECK-NEXT: .cfi_offset ra_auth_code, -12
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; CHECK-NEXT: .pad #4
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; CHECK-NEXT: sub sp, #4
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; ...
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; CHECK: add sp, #4
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; CHECK-NEXT: ldr r12, [sp], #4
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; CHECK-NEXT: pop.w {r7, lr}
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; CHECK-NEXT: aut r12, lr, sp
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; CHECK-NEXT: bx lr
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define hidden i32 @f1(i32 %x) local_unnamed_addr #0 {
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entry:
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%sub = add nsw i32 %x, -1
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%call = tail call i32 @g(i32 %sub)
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%add = add nsw i32 %call, 1
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ret i32 %add
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}
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; CHECK-LABEL: f1:
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; CHECK: pac r12, lr, sp
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; CHECK-NEXT: vstr fpcxtns, [sp, #-4]!
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; CHECK-NEXT: .cfi_def_cfa_offset 4
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; CHECK-NEXT: .save {r7, lr}
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; CHECK-NEXT: push {r7, lr}
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; CHECK: vldr fpcxtns, [sp], #4
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; CHECK: aut r12, lr, sp
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define hidden i32 @f2(i32 %x) local_unnamed_addr #1 {
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entry:
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%sub = add nsw i32 %x, -1
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%call = tail call i32 @g(i32 %sub)
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%add = add nsw i32 %call, 1
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ret i32 %add
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}
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; CHECK-LABEL: f2:
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; CHECK: pac r12, lr, sp
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; CHECK-NEXT: .save {r7, lr}
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; CHECK-NEXT: push {r7, lr}
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: .cfi_offset lr, -4
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; CHECK-NEXT: .cfi_offset r7, -8
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; CHECK-NEXT: .save {ra_auth_code}
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; CHECK-NEXT: str r12, [sp, #-4]!
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; CHECK-NEXT: .cfi_def_cfa_offset 12
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; CHECK-NEXT: .cfi_offset ra_auth_code, -12
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; CHECK-NEXT: .pad #4
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; CHECK-NEXT: sub sp, #4
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; ...
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; CHECK: add sp, #4
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; CHECK-NEXT: ldr r12, [sp], #4
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; CHECK-NEXT: pop.w {r7, lr}
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; CHECK-NEXT: aut r12, lr, sp
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; CHECK-NEXT: mrs r12, control
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; ...
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; CHECK: bxns lr
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declare dso_local i32 @g(i32) local_unnamed_addr
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attributes #0 = { "cmse_nonsecure_entry" "target-features"="+8msecext,+armv8.1-m.main"}
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attributes #1 = { "cmse_nonsecure_entry" "target-features"="+8msecext,+armv8-m.main,+fp-armv8d16"}
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!llvm.module.flags = !{!0, !1, !2}
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!0 = !{i32 8, !"branch-target-enforcement", i32 0}
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!1 = !{i32 8, !"sign-return-address", i32 1}
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!2 = !{i32 8, !"sign-return-address-all", i32 0}
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; UNWIND-LABEL: FunctionAddress: 0x0
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; UNWIND: 0x00 ; vsp = vsp + 4
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; UNWIND-NEXT: 0xB4 ; pop ra_auth_code
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; UNWIND-NEXT: 0x84 0x08 ; pop {r7, lr}
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; UNWIND-NEXT: 0xB0 ; finish
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; UNWIND-NEXT: 0xB0 ; finish
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; UNWIND-LABEL: FunctionAddress: 0x24
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; UNWIND: 0xB4 ; pop ra_auth_code
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; UNWIND-NEXT: 0x84 0x08 ; pop {r7, lr}
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; UNWIND-LABEL: FunctionAddress: 0x54
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; UNWIND: 0x00 ; vsp = vsp + 4
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; UNWIND-NEXT: 0xB4 ; pop ra_auth_code
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; UNWIND-NEXT: 0x84 0x08 ; pop {r7, lr}
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; UNWIND-NEXT: 0xB0 ; finish
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; UNWIND-NEXT: 0xB0 ; finish
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; UNWIND-LABEL: 00000001 {{.*}} f0
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; UNWIND-LABEL: 00000025 {{.*}} f1
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; UNWIND-LABEL: 00000055 {{.*}} f2
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