callbr.ll
2.01 KB
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; RUN: not opt -S %s -verify 2>&1 | FileCheck %s
; CHECK: Indirect label missing from arglist.
; CHECK-NEXT: #test1
define void @test1() {
; The %4 in the indirect label list is not found in the blockaddresses in the
; arg list (bad).
callbr void asm sideeffect "#test1", "X,X"(i8* blockaddress(@test1, %3), i8* blockaddress(@test1, %2))
to label %1 [label %4, label %2]
1:
ret void
2:
ret void
3:
ret void
4:
ret void
}
; CHECK-NOT: Indirect label missing from arglist.
define void @test2() {
; %4 and %2 are both in the indirect label list and the arg list (good).
callbr void asm sideeffect "${0:l} ${1:l}", "X,X"(i8* blockaddress(@test2, %4), i8* blockaddress(@test2, %2))
to label %1 [label %4, label %2]
1:
ret void
2:
ret void
3:
ret void
4:
ret void
}
; CHECK-NOT: Indirect label missing from arglist.
define void @test3() {
; note %2 blockaddress. Such a case is possible when passing the address of
; a label as an input to the inline asm (both address of label and asm goto
; use blockaddress constants; we're testing that the indirect label list from
; the asm goto is in the arg list to the asm).
callbr void asm sideeffect "${0:l} ${1:l} ${2:l}", "X,X,X"(i8* blockaddress(@test3, %4), i8* blockaddress(@test3, %2), i8* blockaddress(@test3, %3))
to label %1 [label %3, label %4]
1:
ret void
2:
ret void
3:
ret void
4:
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,X"(i8* blockaddress(@test4, %abnormal)) to label %normal [label %abnormal]
normal:
ret i32 0
abnormal:
ret i32 %ret
}
;; Ensure you cannot specify the same label as both normal and indirect targets.
; CHECK: Duplicate callbr destination!
; CHECK-NEXT: #test5
define i32 @test5() {
entry:
%ret = callbr i32 asm sideeffect "#test5", "=r,X"(i8* blockaddress(@test5, %both)) to label %both [label %both]
both:
ret i32 0
}