blob: 41ba125ae5c15022e285069d019d7a161d5183ae [file] [log] [blame]
; RUN: llc -mtriple=thumbv8.1m.main-arm-none-eabi < %s | FileCheck %s --check-prefix=BTI
; RUN: llc -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+no-bti-at-return-twice < %s | \
; RUN: FileCheck %s --check-prefix=NOBTI
; C source
; --------
; jmp_buf buf;
;
; extern void bar(int x);
;
; int foo(int x) {
; if (setjmp(buf))
; x = 0;
; else
; bar(x);
; return x;
; }
@buf = global [20 x i64] zeroinitializer, align 8
define i32 @foo(i32 %x) {
; BTI-LABEL: foo:
; BTI: bl setjmp
; BTI-NEXT: bti
; NOBTI-LABEL: foo:
; NOBTI: bl setjmp
; NOBTI-NOT: bti
entry:
%call = call i32 @setjmp(ptr @buf) #0
%tobool.not = icmp eq i32 %call, 0
br i1 %tobool.not, label %if.else, label %if.end
if.else: ; preds = %entry
call void @bar(i32 %x)
br label %if.end
if.end: ; preds = %entry, %if.else
%x.addr.0 = phi i32 [ %x, %if.else ], [ 0, %entry ]
ret i32 %x.addr.0
}
declare void @bar(i32)
declare i32 @setjmp(ptr) #0
attributes #0 = { returns_twice }
!llvm.module.flags = !{!0}
!0 = !{i32 8, !"branch-target-enforcement", i32 1}