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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -passes=newgvn -S | FileCheck %s3 4 5;; Block 6 is reachable, but edge 6->4 is not6;; This means the phi value is undef, not 07; Function Attrs: ssp uwtable8define i16 @hoge() {9; CHECK-LABEL: @hoge(10; CHECK-NEXT: bb:11; CHECK-NEXT: switch i8 undef, label [[BB7:%.*]] [12; CHECK-NEXT: i8 0, label [[BB1:%.*]]13; CHECK-NEXT: i8 12, label [[BB2:%.*]]14; CHECK-NEXT: ]15; CHECK: bb1:16; CHECK-NEXT: br label [[BB6:%.*]]17; CHECK: bb2:18; CHECK-NEXT: br label [[BB4:%.*]]19; CHECK: bb3:20; CHECK-NEXT: unreachable21; CHECK: bb4:22; CHECK-NEXT: ret i16 undef23; CHECK: bb6:24; CHECK-NEXT: br i1 true, label [[BB3:%.*]], label [[BB4]]25; CHECK: bb7:26; CHECK-NEXT: unreachable27;28bb:29 switch i8 undef, label %bb7 [30 i8 0, label %bb131 i8 12, label %bb232 ]33 34bb1: ; preds = %bb35 br label %bb636 37bb2: ; preds = %bb38 br label %bb439 40bb3: ; preds = %bb641 unreachable42 43bb4: ; preds = %bb6, %bb244 %tmp = phi i16 [ 0, %bb6 ], [ undef, %bb2 ]45 ret i16 %tmp46 47bb6: ; preds = %bb448 br i1 true, label %bb3, label %bb449 50bb7: ; preds = %bb51 unreachable52}53 54define i8 @only_undef(i1 %cond) {55; CHECK-LABEL: @only_undef(56; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]57; CHECK: A:58; CHECK-NEXT: br label [[EXIT:%.*]]59; CHECK: B:60; CHECK-NEXT: br label [[EXIT]]61; CHECK: EXIT:62; CHECK-NEXT: ret i8 undef63;64 br i1 %cond, label %A, label %B65A:66 br label %EXIT67B:68 br label %EXIT69EXIT:70 %r = phi i8 [undef, %A], [undef, %B]71 ret i8 %r72}73 74define i8 @only_poison(i1 %cond) {75; CHECK-LABEL: @only_poison(76; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]77; CHECK: A:78; CHECK-NEXT: br label [[EXIT:%.*]]79; CHECK: B:80; CHECK-NEXT: br label [[EXIT]]81; CHECK: EXIT:82; CHECK-NEXT: ret i8 poison83;84 br i1 %cond, label %A, label %B85A:86 br label %EXIT87B:88 br label %EXIT89EXIT:90 %r = phi i8 [poison, %A], [poison, %B]91 ret i8 %r92}93 94define i8 @undef_poison(i1 %cond) {95; CHECK-LABEL: @undef_poison(96; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]97; CHECK: A:98; CHECK-NEXT: br label [[EXIT:%.*]]99; CHECK: B:100; CHECK-NEXT: br label [[EXIT]]101; CHECK: EXIT:102; CHECK-NEXT: ret i8 undef103;104 br i1 %cond, label %A, label %B105A:106 br label %EXIT107B:108 br label %EXIT109EXIT:110 %r = phi i8 [undef, %A], [poison, %B]111 ret i8 %r112}113 114define i8 @value_undef(i1 %cond, i8 %v) {115; CHECK-LABEL: @value_undef(116; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]117; CHECK: A:118; CHECK-NEXT: br label [[EXIT:%.*]]119; CHECK: B:120; CHECK-NEXT: br label [[EXIT]]121; CHECK: EXIT:122; CHECK-NEXT: [[R:%.*]] = phi i8 [ undef, [[A]] ], [ [[V:%.*]], [[B]] ]123; CHECK-NEXT: ret i8 [[R]]124;125 br i1 %cond, label %A, label %B126A:127 br label %EXIT128B:129 br label %EXIT130EXIT:131 %r = phi i8 [undef, %A], [%v, %B]132 ret i8 %r133}134 135define i8 @value_undef_noundef(i1 %cond, i8 noundef %v) {136; CHECK-LABEL: @value_undef_noundef(137; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]138; CHECK: A:139; CHECK-NEXT: br label [[EXIT:%.*]]140; CHECK: B:141; CHECK-NEXT: br label [[EXIT]]142; CHECK: EXIT:143; CHECK-NEXT: ret i8 [[V:%.*]]144;145 br i1 %cond, label %A, label %B146A:147 br label %EXIT148B:149 br label %EXIT150EXIT:151 %r = phi i8 [undef, %A], [%v, %B]152 ret i8 %r153}154 155define i8 @value_poison(i1 %cond, i8 %v) {156; CHECK-LABEL: @value_poison(157; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]158; CHECK: A:159; CHECK-NEXT: br label [[EXIT:%.*]]160; CHECK: B:161; CHECK-NEXT: br label [[EXIT]]162; CHECK: EXIT:163; CHECK-NEXT: ret i8 [[V:%.*]]164;165 br i1 %cond, label %A, label %B166A:167 br label %EXIT168B:169 br label %EXIT170EXIT:171 %r = phi i8 [poison, %A], [%v, %B]172 ret i8 %r173}174