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; RUN: not opt -S %s -verify 2>&1 | FileCheck %s
; CHECK: Number of label constraints does not match number of callbr dests
; CHECK-NEXT: #too_few_label_constraints
define void @too_few_label_constraints() {
callbr void asm sideeffect "#too_few_label_constraints", "!i"()
to label %1 [label %2, label %3]
1:
ret void
2:
ret void
3:
ret void
}
; CHECK-NOT: Number of label constraints does not match number of callbr dests
define void @correct_label_constraints() {
callbr void asm sideeffect "${0:l} ${1:l}", "!i,!i"()
to label %1 [label %2, label %3]
1:
ret void
2:
ret void
3:
ret void
}
; CHECK: Number of label constraints does not match number of callbr dests
; CHECK-NEXT: #too_many_label_constraints
define void @too_many_label_constraints() {
callbr void asm sideeffect "#too_many_label_constraints", "!i,!i,!i"()
to label %1 [label %2, label %3]
1:
ret void
2:
ret void
3:
ret void
}
; CHECK: Label constraints can only be used with callbr
; CHECK-NEXT: #label_constraint_without_callbr
define void @label_constraint_without_callbr() {
call void asm sideeffect "#label_constraint_without_callbr", "!i"()
ret void
}
; CHECK: Number of label constraints does not match number of callbr dests
; CHECK-NEXT: #callbr_without_label_constraint
define void @callbr_without_label_constraint() {
callbr void asm sideeffect "#callbr_without_label_constraint", ""()
to label %1 [label %2]
1:
ret void
2:
ret void
}
;; Ensure you cannot use the return value of a callbr in indirect targets.
; CHECK: Instruction does not dominate all uses!
; CHECK-NEXT: #test4
define i32 @test4(i1 %var) {
entry:
%ret = callbr i32 asm sideeffect "#test4", "=r,!i"() to label %normal [label %abnormal]
normal:
ret i32 0
abnormal:
ret i32 %ret
}
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