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Differential D135125 Diff 464882 llvm/test/Transforms/JumpThreading/pr40992-indirectbr-folding.ll

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llvm/test/Transforms/JumpThreading/pr40992-indirectbr-folding.ll

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