forked from OSchip/llvm-project
45 lines
849 B
LLVM
45 lines
849 B
LLVM
; 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
|
|
}
|