Imported Upstream version 5.18.0.207

Former-commit-id: 3b152f462918d427ce18620a2cbe4f8b79650449

external/llvm/test/Transforms/SimplifyCFG/switch_thread.ll

@@ -1,113 +0,0 @@
-; RUN: opt < %s -simplifycfg -S | FileCheck %s
-
-; Test that we can thread a simple known condition through switch statements.
-
-declare void @foo1()
-
-declare void @foo2()
-
-declare void @DEAD()
-
-define void @test1(i32 %V) {
-        switch i32 %V, label %A [
-                 i32 4, label %T
-                 i32 17, label %Done
-                 i32 1234, label %A
-        ]
-;; V == 4 if we get here.
-T:              ; preds = %0
-        call void @foo1( )
-        ;; This switch is always statically determined.
-        switch i32 %V, label %A2 [
-                 i32 4, label %B
-                 i32 17, label %C
-                 i32 42, label %C
-        ]
-A2:             ; preds = %T
-        call void @DEAD( )
-        call void @DEAD( )
-        ;; always true
-        %cond2 = icmp eq i32 %V, 4              ; <i1> [#uses=1]
-        br i1 %cond2, label %Done, label %C
-A:              ; preds = %0, %0
-        call void @foo1( )
-        ;; always true
-        %cond = icmp ne i32 %V, 4               ; <i1> [#uses=1]
-        br i1 %cond, label %Done, label %C
-Done:           ; preds = %B, %A, %A2, %0
-        ret void
-B:              ; preds = %T
-        call void @foo2( )
-        ;; always true
-        %cond3 = icmp eq i32 %V, 4              ; <i1> [#uses=1]
-        br i1 %cond3, label %Done, label %C
-C:              ; preds = %B, %A, %A2, %T, %T
-        call void @DEAD( )
-        ret void
-
-; CHECK-LABEL: @test1(
-; CHECK-NEXT:    switch i32 %V, label %A [
-; CHECK-NEXT:    i32 4, label %T
-; CHECK-NEXT:    i32 17, label %Done
-; CHECK-NEXT:    ]
-; CHECK:       T:
-; CHECK-NEXT:    call void @foo1()
-; CHECK-NEXT:    call void @foo2()
-; CHECK-NEXT:    br label %Done
-; CHECK:       A:
-; CHECK-NEXT:    call void @foo1()
-; CHECK-NEXT:    br label %Done
-; CHECK:       Done:
-; CHECK-NEXT:    ret void
-}
-
-define void @test2(i32 %V) {
-        switch i32 %V, label %A [
-                 i32 4, label %T
-                 i32 17, label %D
-                 i32 1234, label %E
-        ]
-;; V != 4, 17, 1234 here.
-A:              ; preds = %0
-        call void @foo1( )
-        ;; This switch is always statically determined.
-        switch i32 %V, label %E [
-                 i32 4, label %C
-                 i32 17, label %C
-                 i32 42, label %D
-        ]
-;; unreacahble.
-C:              ; preds = %A, %A
-        call void @DEAD( )
-        ret void
-T:              ; preds = %0
-        call void @foo1( )
-        call void @foo1( )
-        ret void
-D:              ; preds = %A, %0
-        call void @foo1( )
-        ret void
-E:              ; preds = %A, %0
-        ret void
-
-; CHECK-LABEL: @test2(
-; CHECK-NEXT:    switch i32 %V, label %A [
-; CHECK-NEXT:    i32 4, label %T
-; CHECK-NEXT:    i32 17, label %D
-; CHECK-NEXT:    i32 1234, label %E
-; CHECK-NEXT:    ]
-; CHECK:       A:
-; CHECK-NEXT:    call void @foo1()
-; CHECK-NEXT:    [[COND:%.*]] = icmp eq i32 %V, 42
-; CHECK-NEXT:    br i1 [[COND]], label %D, label %E
-; CHECK:       T:
-; CHECK-NEXT:    call void @foo1()
-; CHECK-NEXT:    call void @foo1()
-; CHECK-NEXT:    ret void
-; CHECK:       D:
-; CHECK-NEXT:    call void @foo1()
-; CHECK-NEXT:    ret void
-; CHECK:       E:
-; CHECK-NEXT:    ret void
-}
-