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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 = "thumbv7m-arm-none-eabi"
; C++, -Oz
; __attribute__((noinline)) int h(int a, int b) {
; if (a < 0)
; throw 1;
; return a + b;
; }
;
; int f(int a, int b, int c, int d) {
; if (a < 0)
; return -1;
; a = h(a, b);
; return 2 + a * (a + b) / (c + d);
; }
;
; int g(int a, int b, int c, int d) {
; if (a < 0)
; return -1;
; a = h(a, b);
; return 1 + a * (a + b) / (c + d);
; }
@_ZTIi = external dso_local constant ptr
define hidden i32 @_Z1hii(i32 %a, i32 %b) local_unnamed_addr #0 {
entry:
%cmp = icmp slt i32 %a, 0
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
%exception = tail call ptr @__cxa_allocate_exception(i32 4) #1
store i32 1, ptr %exception, align 8
tail call void @__cxa_throw(ptr %exception, ptr @_ZTIi, ptr null) #2
unreachable
if.end: ; preds = %entry
%add = add nsw i32 %b, %a
ret i32 %add
}
; CHECK-LABEL: _Z1hii:
; ...
; 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-NOT: pac
; CHECK: aut
; CHECK: .cfi_endproc
declare dso_local ptr @__cxa_allocate_exception(i32) local_unnamed_addr
declare dso_local void @__cxa_throw(ptr, ptr, ptr) local_unnamed_addr
define hidden i32 @_Z1fiiii(i32 %a, i32 %b, i32 %c, i32 %d) local_unnamed_addr #0 {
entry:
%cmp = icmp slt i32 %a, 0
br i1 %cmp, label %return, label %if.end
if.end: ; preds = %entry
%call = tail call i32 @_Z1hii(i32 %a, i32 %b)
%add = add nsw i32 %call, %b
%mul = mul nsw i32 %add, %call
%add1 = add nsw i32 %d, %c
%div = sdiv i32 %mul, %add1
%add2 = add nsw i32 %div, 2
br label %return
return: ; preds = %entry, %if.end
%retval.0 = phi i32 [ %add2, %if.end ], [ -1, %entry ]
ret i32 %retval.0
}
; CHECK-LABEL: _Z1fiiii:
; ...
; CHECK: pac r12, lr, sp
; CHECK-NEXT: .save {r4, r5, r6, lr}
; CHECK-NEXT: push {r4, r5, r6, lr}
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset lr, -4
; CHECK-NEXT: .cfi_offset r6, -8
; CHECK-NEXT: .cfi_offset r5, -12
; CHECK-NEXT: .cfi_offset r4, -16
; CHECK-NEXT: .save {ra_auth_code}
; CHECK-NEXT: str r12, [sp, #-4]!
; CHECK-NEXT: .cfi_def_cfa_offset 20
; CHECK-NEXT: .cfi_offset ra_auth_code, -20
; CHECK-NEXT: .pad #4
; CHECK-NEXT: sub sp, #4
; CHECK-NEXT: .cfi_def_cfa_offset 24
; ...
; CHECK: bl OUTLINED_FUNCTION_0
; ...
; CHECK: add sp, #4
; CHECK-NEXT: ldr r12, [sp], #4
; CHECK-NEXT: pop.w {r4, r5, r6, lr}
; CHECK-NEXT: aut r12, lr, sp
; CHECK-NEXT: bx lr
define hidden i32 @_Z1giiii(i32 %a, i32 %b, i32 %c, i32 %d) local_unnamed_addr #0 {
entry:
%cmp = icmp slt i32 %a, 0
br i1 %cmp, label %return, label %if.end
if.end: ; preds = %entry
%call = tail call i32 @_Z1hii(i32 %a, i32 %b)
%add = add nsw i32 %call, %b
%mul = mul nsw i32 %add, %call
%add1 = add nsw i32 %d, %c
%div = sdiv i32 %mul, %add1
%add2 = add nsw i32 %div, 1
br label %return
return: ; preds = %entry, %if.end
%retval.0 = phi i32 [ %add2, %if.end ], [ -1, %entry ]
ret i32 %retval.0
}
; CHECK-LABEL: _Z1giiii:
; ...
; CHECK: pac r12, lr, sp
; CHECK-NEXT: .save {r4, r5, r6, lr}
; CHECK-NEXT: push {r4, r5, r6, lr}
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset lr, -4
; CHECK-NEXT: .cfi_offset r6, -8
; CHECK-NEXT: .cfi_offset r5, -12
; CHECK-NEXT: .cfi_offset r4, -16
; CHECK-NEXT: .save {ra_auth_code}
; CHECK-NEXT: str r12, [sp, #-4]!
; CHECK-NEXT: .cfi_def_cfa_offset 20
; CHECK-NEXT: .cfi_offset ra_auth_code, -20
; CHECK-NEXT: .pad #4
; CHECK-NEXT: sub sp, #4
; CHECK-NEXT: .cfi_def_cfa_offset 24
; ...
; CHECK: bl OUTLINED_FUNCTION_0
; ...
; CHECK: add sp, #4
; CHECK-NEXT: ldr r12, [sp], #4
; CHECK-NEXT: pop.w {r4, r5, r6, lr}
; CHECK-NEXT: aut r12, lr, sp
; CHECK-NEXT: bx lr
; CHEK-LABEL: OUTLINED_FUNCTION_0:
; CHECK-NOT: pac
; CHECK-NOT: aut
; CHECK: b _Z1hii
attributes #0 = { minsize noinline optsize "denormal-fp-math"="preserve-sign,preserve-sign" "denormal-fp-math-f32"="ieee,ieee" "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="true" "no-jump-tables"="false" "no-nans-fp-math"="true" "no-signed-zeros-fp-math"="true" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="cortex-m3" "target-features"="+armv7-m,+hwdiv,+thumb-mode" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind }
attributes #2 = { noreturn }
!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: 0x0
; UNWIND: Opcodes
; UNWIND-NEXT: 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: 0x3C
; UNWIND: Opcodes
; UNWIND-NEXT: 0x00 ; vsp = vsp + 4
; UNWIND-NEXT: 0xB4 ; pop ra_auth_code
; UNWIND-NEXT: 0xAA ; pop {r4, r5, r6, lr}
; UNWIND-LABEL: FunctionAddress: 0x72
; UNWIND: Opcodes
; UNWIND-NEXT: 0x00 ; vsp = vsp + 4
; UNWIND-NEXT: 0xB4 ; pop ra_auth_code
; UNWIND-NEXT: 0xAA ; pop {r4, r5, r6, lr}
; UNWIND-LABEL: FunctionAddress: 0xA8
; UNWIND: Opcodes
; UNWIND-NEXT: 0xB0 ; finish
; UNWIND-NEXT: 0xB0 ; finish
; UNWIND-NEXT: 0xB0 ; finish
; UNWIND: 000000a9 {{.*}} OUTLINED_FUNCTION_0
; UWNIND: 00000001 {{.*}} _Z1hii
; UWNIND: 0000003d {{.*}} _Z1fiiii
; UWNIND: 00000073 {{.*}} _Z1giiii
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