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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature
; RUN: opt -passes=ipsccp < %s -S | FileCheck %s
; RUN: opt -passes='ipsccp,ipsccp' < %s -S | FileCheck %s
define void @barney() {
; CHECK-LABEL: define {{[^@]+}}@barney() {
; CHECK-NEXT: bb:
; CHECK-NEXT: br label [[BB9:%.*]]
; CHECK: bb6:
; CHECK-NEXT: unreachable
; CHECK: bb9:
; CHECK-NEXT: br label [[BB6:%.*]]
;
bb:
br label %bb9
bb6: ; preds = %bb9
unreachable
bb7: ; preds = %bb9
unreachable
bb9: ; preds = %bb
switch i16 0, label %bb6 [
i16 61, label %bb7
]
}
define void @blam() {
; CHECK-LABEL: define {{[^@]+}}@blam() {
; CHECK-NEXT: bb:
; CHECK-NEXT: br label [[BB16:%.*]]
; CHECK: bb16:
; CHECK-NEXT: br label [[BB38:%.*]]
; CHECK: bb38:
; CHECK-NEXT: unreachable
;
bb:
br label %bb16
bb16: ; preds = %bb
switch i32 0, label %bb38 [
i32 66, label %bb17
i32 63, label %bb18
i32 86, label %bb19
]
bb17: ; preds = %bb16
unreachable
bb18: ; preds = %bb16
unreachable
bb19: ; preds = %bb16
unreachable
bb38: ; preds = %bb16
unreachable
}
define void @hoge() {
; CHECK-LABEL: define {{[^@]+}}@hoge() {
; CHECK-NEXT: bb:
; CHECK-NEXT: unreachable
;
bb:
switch i16 undef, label %bb1 [
i16 135, label %bb2
i16 66, label %bb2
]
bb1: ; preds = %bb
ret void
bb2: ; preds = %bb, %bb
switch i16 0, label %bb3 [
i16 61, label %bb4
i16 54, label %bb4
i16 49, label %bb4
]
bb3: ; preds = %bb2
unreachable
bb4: ; preds = %bb2, %bb2, %bb2
unreachable
}
; Test case from PR49573. %default.bb is unfeasible. Make sure it gets replaced
; by an unreachable block.
define void @pr49573_main() {
; CHECK-LABEL: define {{[^@]+}}@pr49573_main() {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TGT:%.*]] = call i16 @pr49573_fn()
; CHECK-NEXT: unreachable
;
entry:
%tgt = call i16 @pr49573_fn()
switch i16 %tgt, label %default.bb [
i16 0, label %case.0
i16 1, label %case.1
i16 2, label %case.2
]
case.0:
unreachable
default.bb:
ret void
case.1:
ret void
case.2:
br label %next
next:
%tgt.2 = call i16 @pr49573_fn_2()
switch i16 %tgt.2, label %default.bb [
i16 0, label %case.0
i16 2, label %case.2
]
}
; Make sure a new unreachable BB is created.
define void @pr49573_main_2() {
; CHECK-LABEL: define {{[^@]+}}@pr49573_main_2() {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TGT:%.*]] = call i16 @pr49573_fn()
; CHECK-NEXT: unreachable
;
entry:
%tgt = call i16 @pr49573_fn()
switch i16 %tgt, label %default.bb [
i16 0, label %case.0
i16 1, label %case.1
i16 2, label %case.2
]
case.0:
unreachable
default.bb:
ret void
case.1:
ret void
case.2:
ret void
}
define internal i16 @pr49573_fn() {
; CHECK-LABEL: define {{[^@]+}}@pr49573_fn() {
; CHECK-NEXT: entry:
; CHECK-NEXT: unreachable
;
entry:
br i1 undef, label %then, label %else
then:
ret i16 0
else:
ret i16 2
}
define internal i16 @pr49573_fn_2() {
; CHECK-LABEL: define {{[^@]+}}@pr49573_fn_2() {
; CHECK-NEXT: entry:
; CHECK-NEXT: unreachable
;
entry:
br i1 undef, label %then, label %else
then:
ret i16 0
else:
ret i16 2
}
|
