174 lines
4.1 KiB
LLVM
174 lines
4.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=newgvn -S | FileCheck %s
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;; Block 6 is reachable, but edge 6->4 is not
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;; This means the phi value is undef, not 0
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; Function Attrs: ssp uwtable
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define i16 @hoge() {
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; CHECK-LABEL: @hoge(
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; CHECK-NEXT: bb:
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; CHECK-NEXT: switch i8 undef, label [[BB7:%.*]] [
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; CHECK-NEXT: i8 0, label [[BB1:%.*]]
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; CHECK-NEXT: i8 12, label [[BB2:%.*]]
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; CHECK-NEXT: ]
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; CHECK: bb1:
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; CHECK-NEXT: br label [[BB6:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: br label [[BB4:%.*]]
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; CHECK: bb3:
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; CHECK-NEXT: unreachable
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; CHECK: bb4:
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; CHECK-NEXT: ret i16 undef
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; CHECK: bb6:
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; CHECK-NEXT: br i1 true, label [[BB3:%.*]], label [[BB4]]
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; CHECK: bb7:
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; CHECK-NEXT: unreachable
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;
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bb:
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switch i8 undef, label %bb7 [
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i8 0, label %bb1
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i8 12, label %bb2
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]
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bb1: ; preds = %bb
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br label %bb6
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bb2: ; preds = %bb
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br label %bb4
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bb3: ; preds = %bb6
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unreachable
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bb4: ; preds = %bb6, %bb2
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%tmp = phi i16 [ 0, %bb6 ], [ undef, %bb2 ]
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ret i16 %tmp
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bb6: ; preds = %bb4
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br i1 true, label %bb3, label %bb4
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bb7: ; preds = %bb
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unreachable
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}
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define i8 @only_undef(i1 %cond) {
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; CHECK-LABEL: @only_undef(
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]
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; CHECK: A:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: B:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: EXIT:
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; CHECK-NEXT: ret i8 undef
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;
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br i1 %cond, label %A, label %B
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A:
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br label %EXIT
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B:
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br label %EXIT
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EXIT:
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%r = phi i8 [undef, %A], [undef, %B]
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ret i8 %r
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}
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define i8 @only_poison(i1 %cond) {
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; CHECK-LABEL: @only_poison(
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]
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; CHECK: A:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: B:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: EXIT:
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; CHECK-NEXT: ret i8 poison
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;
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br i1 %cond, label %A, label %B
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A:
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br label %EXIT
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B:
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br label %EXIT
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EXIT:
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%r = phi i8 [poison, %A], [poison, %B]
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ret i8 %r
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}
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define i8 @undef_poison(i1 %cond) {
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; CHECK-LABEL: @undef_poison(
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]
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; CHECK: A:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: B:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: EXIT:
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; CHECK-NEXT: ret i8 undef
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;
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br i1 %cond, label %A, label %B
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A:
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br label %EXIT
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B:
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br label %EXIT
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EXIT:
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%r = phi i8 [undef, %A], [poison, %B]
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ret i8 %r
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}
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define i8 @value_undef(i1 %cond, i8 %v) {
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; CHECK-LABEL: @value_undef(
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]
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; CHECK: A:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: B:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: EXIT:
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; CHECK-NEXT: [[R:%.*]] = phi i8 [ undef, [[A]] ], [ [[V:%.*]], [[B]] ]
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; CHECK-NEXT: ret i8 [[R]]
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;
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br i1 %cond, label %A, label %B
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A:
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br label %EXIT
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B:
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br label %EXIT
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EXIT:
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%r = phi i8 [undef, %A], [%v, %B]
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ret i8 %r
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}
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define i8 @value_undef_noundef(i1 %cond, i8 noundef %v) {
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; CHECK-LABEL: @value_undef_noundef(
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]
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; CHECK: A:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: B:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: EXIT:
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; CHECK-NEXT: ret i8 [[V:%.*]]
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;
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br i1 %cond, label %A, label %B
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A:
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br label %EXIT
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B:
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br label %EXIT
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EXIT:
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%r = phi i8 [undef, %A], [%v, %B]
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ret i8 %r
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}
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define i8 @value_poison(i1 %cond, i8 %v) {
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; CHECK-LABEL: @value_poison(
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]
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; CHECK: A:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: B:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: EXIT:
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; CHECK-NEXT: ret i8 [[V:%.*]]
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;
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br i1 %cond, label %A, label %B
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A:
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br label %EXIT
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B:
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br label %EXIT
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EXIT:
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%r = phi i8 [poison, %A], [%v, %B]
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ret i8 %r
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}
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