pr40992-indirectbr-folding.ll
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; RUN: opt -S < %s -jump-threading | FileCheck %s
; PR40992: Do not incorrectly fold %bb5 into an unconditional br to %bb7.
; Also verify we correctly thread %bb1 -> %bb7 when %c is false.
define i32 @jtbr(i1 %v1, i1 %v2, i1 %v3) {
; CHECK: bb0:
bb0:
br label %bb1
; CHECK: bb1:
; CHECK-NEXT: and
; CHECK-NEXT: br i1 %c, label %bb2, label %bb7
bb1:
%c = and i1 %v1, %v2
br i1 %c, label %bb2, label %bb5
; CHECK: bb2:
; CHECK-NEXT: select
; CHECK-NEXT: indirectbr i8* %ba, [label %bb3, label %bb5]
bb2:
%ba = select i1 %v3, i8* blockaddress(@jtbr, %bb3), i8* blockaddress(@jtbr, %bb4)
indirectbr i8* %ba, [label %bb3, label %bb4]
; CHECK: bb3:
bb3:
br label %bb1
; CHECK-NOT: bb4:
bb4:
br label %bb5
; CHECK: bb5:
bb5:
br i1 %c, label %bb6, label %bb7
; CHECK: bb6:
bb6:
ret i32 0
; CHECK: bb7:
bb7:
ret i32 1
}