declare fastcc void @callee_stack0()
declare fastcc void @callee_stack8([8 x i32], i64)
declare fastcc void @callee_stack16([8 x i32], i64, i64)
+declare extern_weak fastcc void @callee_weak()
define fastcc void @caller_to0_from0() nounwind {
; CHECK-LABEL: caller_to0_from0:
; CHECK-NEXT: // BB
+
tail call fastcc void @callee_stack0()
ret void
+
; CHECK-NEXT: b callee_stack0
}
tail call fastcc void @callee_stack0()
ret void
+
; CHECK: add sp, sp, #16
; CHECK-NEXT: b callee_stack0
}
; pointer (we didn't have arg space to reuse).
tail call fastcc void @callee_stack8([8 x i32] undef, i64 42)
ret void
-; CHECK: str {{x[0-9]+}}, [sp, #16]
-; CHECK-NEXT: add sp, sp, #16
+
+; CHECK: str {{x[0-9]+}}, [sp, #16]!
; CHECK-NEXT: b callee_stack8
}
; Key point is that the "%a" should go where at SP on entry.
tail call fastcc void @callee_stack8([8 x i32] undef, i64 42)
ret void
-; CHECK: str {{x[0-9]+}}, [sp, #16]
-; CHECK-NEXT: add sp, sp, #16
+
+; CHECK: str {{x[0-9]+}}, [sp, #16]!
; CHECK-NEXT: b callee_stack8
}
; above %a on the stack. If it tries to go below incoming-SP then the
; callee will not deallocate the space, even in fastcc.
tail call fastcc void @callee_stack16([8 x i32] undef, i64 42, i64 2)
-; CHECK: str {{x[0-9]+}}, [sp, #24]
-; CHECK: str {{x[0-9]+}}, [sp, #16]
-; CHECK: add sp, sp, #16
-; CHECK: b callee_stack16
+
+; CHECK: stp {{x[0-9]+}}, {{x[0-9]+}}, [sp, #16]
+; CHECK-NEXT: add sp, sp, #16
+; CHECK-NEXT: b callee_stack16
ret void
}
; Key point is that the "%a" should go where at #16 above SP on entry.
tail call fastcc void @callee_stack8([8 x i32] undef, i64 42)
ret void
-; CHECK: str {{x[0-9]+}}, [sp, #32]
-; CHECK-NEXT: add sp, sp, #32
+
+; CHECK: str {{x[0-9]+}}, [sp, #32]!
; CHECK-NEXT: b callee_stack8
}
tail call fastcc void @callee_stack16([8 x i32] undef, i64 %b, i64 %a)
ret void
-; CHECK: ldr x0,
-; CHECK: ldr x1,
-; CHECK: str x1,
-; CHECK: str x0,
+; CHECK: ldp {{x[0-9]+}}, {{x[0-9]+}}, [sp, #16]
+; CHECK: stp {{x[0-9]+}}, {{x[0-9]+}}, [sp, #16]
+; CHECK-NEXT: add sp, sp, #16
+; CHECK-NEXT: b callee_stack16
+}
+
-; CHECK: add sp, sp, #16
-; CHECK: b callee_stack16
+; Weakly-referenced extern functions cannot be tail-called, as AAELF does
+; not define the behaviour of branch instructions to undefined weak symbols.
+define fastcc void @caller_weak() {
+; CHECK-LABEL: caller_weak:
+; CHECK: bl callee_weak
+ tail call void @callee_weak()
+ ret void
}