| ; 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 i8* |
| |
| 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 i8* @__cxa_allocate_exception(i32 4) #1 |
| %0 = bitcast i8* %exception to i32* |
| store i32 1, i32* %0, align 8 |
| tail call void @__cxa_throw(i8* %exception, i8* bitcast (i8** @_ZTIi to i8*), i8* 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 i8* @__cxa_allocate_exception(i32) local_unnamed_addr |
| |
| declare dso_local void @__cxa_throw(i8*, i8*, i8*) 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 |
