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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=dse -S %s | FileCheck %s
@b = local_unnamed_addr global i32 0, align 4
; Reduced test case for PR47285.
; `store i32 9, ptr @b` in %interesting is not killed by `store i32 23, ptr @b`
; in %killer, because it is not overwritten before reaching the end of the
; function via %bb.2 -> %no.overwrite.exit.
define void @test(i1 %c.0, i1 %c.2, i1 %c.3, i1 %c.4, i1 %c.5, i1 %c.6) {
; CHECK-LABEL: @test(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB_2:%.*]]
; CHECK: bb.2:
; CHECK-NEXT: br i1 [[C_0:%.*]], label [[BB_3:%.*]], label [[NO_OVERWRITE_EXIT:%.*]]
; CHECK: no.overwrite.exit:
; CHECK-NEXT: ret void
; CHECK: bb.3:
; CHECK-NEXT: br i1 [[C_2:%.*]], label [[BB_4:%.*]], label [[BB_7:%.*]]
; CHECK: bb.4:
; CHECK-NEXT: br i1 [[C_4:%.*]], label [[BB_5:%.*]], label [[BB_6:%.*]]
; CHECK: bb.5:
; CHECK-NEXT: store i32 99, ptr @b, align 4
; CHECK-NEXT: br i1 [[C_3:%.*]], label [[BB_5]], label [[BB_2]]
; CHECK: bb.6:
; CHECK-NEXT: store i32 91, ptr @b, align 4
; CHECK-NEXT: br i1 [[C_5:%.*]], label [[SPLIT_CRIT_EDGE_2:%.*]], label [[BB_2]]
; CHECK: split_crit_edge.2:
; CHECK-NEXT: store i32 27, ptr @b, align 4
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: bb.7:
; CHECK-NEXT: br i1 [[C_4]], label [[INTERESTING:%.*]], label [[BB_8:%.*]]
; CHECK: interesting:
; CHECK-NEXT: store i32 9, ptr @b, align 4
; CHECK-NEXT: br i1 [[C_6:%.*]], label [[KILLER:%.*]], label [[BB_2]]
; CHECK: killer:
; CHECK-NEXT: store i32 23, ptr @b, align 4
; CHECK-NEXT: ret void
; CHECK: bb.8:
; CHECK-NEXT: store i32 19, ptr @b, align 4
; CHECK-NEXT: br i1 [[C_4]], label [[EXIT]], label [[BB_2]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %bb.2
bb.2: ; preds = %bb.8, %interesting, %bb.6, %bb.5, %entry
br i1 %c.0, label %bb.3, label %no.overwrite.exit
no.overwrite.exit: ; preds = %bb.2
ret void
bb.3: ; preds = %bb.2
br i1 %c.2, label %bb.4, label %bb.7
bb.4: ; preds = %bb.3
br i1 %c.4, label %bb.5, label %bb.6
bb.5: ; preds = %bb.5, %bb.4
store i32 99, ptr @b, align 4
br i1 %c.3, label %bb.5, label %bb.2
bb.6: ; preds = %bb.4
store i32 91, ptr @b, align 4
br i1 %c.5, label %split_crit_edge.2, label %bb.2
split_crit_edge.2: ; preds = %bb.6
store i32 27, ptr @b, align 4
br label %exit
bb.7: ; preds = %bb.3
br i1 %c.4, label %interesting, label %bb.8
interesting: ; preds = %bb.7
store i32 9, ptr @b, align 4
br i1 %c.6, label %killer, label %bb.2
killer: ; preds = %interesting
store i32 23, ptr @b, align 4
ret void
bb.8: ; preds = %bb.7
store i32 19, ptr @b, align 4
br i1 %c.4, label %exit, label %bb.2
exit: ; preds = %bb.8, %split_crit_edge.2
ret void
}
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