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; RUN: not opt -S %s -passes=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 can use the return value of a callbr in indirect targets.
;; No issue!
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
}
;; Tests of the callbr.landingpad intrinsic function.
declare i32 @llvm.callbr.landingpad.i64(i64)
define void @callbrpad_bad_type() {
entry:
; CHECK: Intrinsic has incorrect argument type!
; CHECK-NEXT: ptr @llvm.callbr.landingpad.i64
%foo = call i32 @llvm.callbr.landingpad.i64(i64 42)
ret void
}
declare i32 @llvm.callbr.landingpad.i32(i32)
define i32 @callbrpad_multi_preds() {
entry:
%foo = callbr i32 asm "", "=r,!i"() to label %direct [label %indirect]
direct:
br label %indirect
indirect:
; CHECK-NEXT: Intrinsic in block must have 1 unique predecessor
; CHECK-NEXT: %out = call i32 @llvm.callbr.landingpad.i32(i32 %foo)
%out = call i32 @llvm.callbr.landingpad.i32(i32 %foo)
ret i32 %out
}
define void @callbrpad_wrong_callbr() {
entry:
%foo = callbr i32 asm "", "=r,!i"() to label %direct [label %indirect]
direct:
; CHECK-NEXT: Intrinsic's corresponding callbr must have intrinsic's parent basic block in indirect destination list
; CHECK-NEXT: %x = call i32 @llvm.callbr.landingpad.i32(i32 %foo)
%x = call i32 @llvm.callbr.landingpad.i32(i32 %foo)
ret void
indirect:
ret void
}
declare i32 @foo(i32)
define i32 @test_callbr_landingpad_not_first_inst() {
entry:
%0 = callbr i32 asm "", "=r,!i"()
to label %asm.fallthrough [label %landingpad]
asm.fallthrough:
ret i32 42
landingpad:
%foo = call i32 @foo(i32 42)
; CHECK-NEXT: No other instructions may proceed intrinsic
; CHECK-NEXT: %out = call i32 @llvm.callbr.landingpad.i32(i32 %0)
%out = call i32 @llvm.callbr.landingpad.i32(i32 %0)
ret i32 %out
}
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