1; RUN: llc -mtriple=thumbv8.1m.main-arm-none-eabi < %s | FileCheck %s --check-prefix=BTI 2; RUN: llc -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+no-bti-at-return-twice < %s | \ 3; RUN: FileCheck %s --check-prefix=NOBTI 4 5; C source 6; -------- 7; jmp_buf buf; 8; 9; extern void bar(int x); 10; 11; int foo(int x) { 12; if (setjmp(buf)) 13; x = 0; 14; else 15; bar(x); 16; return x; 17; } 18 19@buf = global [20 x i64] zeroinitializer, align 8 20 21define i32 @foo(i32 %x) { 22; BTI-LABEL: foo: 23; BTI: bl setjmp 24; BTI-NEXT: bti 25; NOBTI-LABEL: foo: 26; NOBTI: bl setjmp 27; NOBTI-NOT: bti 28 29entry: 30 %call = call i32 @setjmp(i64* getelementptr inbounds ([20 x i64], [20 x i64]* @buf, i32 0, i32 0)) #0 31 %tobool.not = icmp eq i32 %call, 0 32 br i1 %tobool.not, label %if.else, label %if.end 33 34if.else: ; preds = %entry 35 call void @bar(i32 %x) 36 br label %if.end 37 38if.end: ; preds = %entry, %if.else 39 %x.addr.0 = phi i32 [ %x, %if.else ], [ 0, %entry ] 40 ret i32 %x.addr.0 41} 42 43declare void @bar(i32) 44declare i32 @setjmp(i64*) #0 45 46attributes #0 = { returns_twice } 47 48!llvm.module.flags = !{!0} 49 50!0 = !{i32 1, !"branch-target-enforcement", i32 1} 51