| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -newgvn -S | FileCheck %s |
| |
| |
| ;; Block 6 is reachable, but edge 6->4 is not |
| ;; This means the phi value is undef, not 0 |
| ; Function Attrs: ssp uwtable |
| define i16 @hoge() local_unnamed_addr #0 align 2 { |
| ; CHECK-LABEL: @hoge( |
| ; CHECK-NEXT: bb: |
| ; CHECK-NEXT: switch i8 undef, label [[BB7:%.*]] [ |
| ; CHECK-NEXT: i8 0, label [[BB1:%.*]] |
| ; CHECK-NEXT: i8 12, label [[BB2:%.*]] |
| ; CHECK-NEXT: ] |
| ; CHECK: bb1: |
| ; CHECK-NEXT: br label [[BB6:%.*]] |
| ; CHECK: bb2: |
| ; CHECK-NEXT: br label [[BB4:%.*]] |
| ; CHECK: bb3: |
| ; CHECK-NEXT: unreachable |
| ; CHECK: bb4: |
| ; CHECK-NEXT: ret i16 undef |
| ; CHECK: bb6: |
| ; CHECK-NEXT: br i1 true, label [[BB3:%.*]], label [[BB4]], !llvm.loop !1 |
| ; CHECK: bb7: |
| ; CHECK-NEXT: unreachable |
| ; |
| bb: |
| switch i8 undef, label %bb7 [ |
| i8 0, label %bb1 |
| i8 12, label %bb2 |
| ] |
| |
| bb1: ; preds = %bb |
| br label %bb6 |
| |
| bb2: ; preds = %bb |
| br label %bb4 |
| |
| bb3: ; preds = %bb6 |
| unreachable |
| |
| bb4: ; preds = %bb6, %bb2 |
| %tmp = phi i16 [ 0, %bb6 ], [ undef, %bb2 ] |
| ret i16 %tmp |
| |
| bb6: ; preds = %bb4 |
| br i1 true, label %bb3, label %bb4, !llvm.loop !1 |
| |
| bb7: ; preds = %bb |
| unreachable |
| } |
| |
| attributes #0 = { ssp uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="penryn" "target-features"="+cx16,+fxsr,+mmx,+sse,+sse2,+sse3,+sse4.1,+ssse3,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| |
| !llvm.ident = !{!0} |
| |
| !0 = !{!"clang version 5.0.0"} |
| !1 = distinct !{!1, !2} |
| !2 = !{!"llvm.loop.unroll.disable"} |
