[Attributor][Tests][NFC] Add more range tests
Inspired by https://llvm.discourse.group/t/impossible-condition-optimization/461
This commit is contained in:
Johannes Doerfert
parent
d0749cc709
commit
103364b4b2
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@ -525,6 +525,164 @@ return: ; preds = %if.end3, %if.then
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}
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declare dso_local i32 @foo(i32)
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declare dso_local i32 @foo(i32)
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; Examples taken from https://llvm.discourse.group/t/impossible-condition-optimization/461/1
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;
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; The important part is that we return a constant (false)
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;
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; {
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; FIXME: All but the return is not needed anymore
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define dso_local zeroext i1 @phi(i32 %arg) {
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; OLD_PM-LABEL: define {{[^@]+}}@phi
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; OLD_PM-SAME: (i32 [[ARG:%.*]])
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; OLD_PM-NEXT: bb:
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; OLD_PM-NEXT: [[TMP:%.*]] = icmp sgt i32 [[ARG]], 5
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; OLD_PM-NEXT: br i1 [[TMP]], label [[BB1:%.*]], label [[BB2:%.*]]
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; OLD_PM: bb1:
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; OLD_PM-NEXT: br label [[BB3:%.*]]
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; OLD_PM: bb2:
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; OLD_PM-NEXT: br label [[BB3]]
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; OLD_PM: bb3:
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; OLD_PM-NEXT: [[DOT02:%.*]] = phi i32 [ 1, [[BB1]] ], [ 2, [[BB2]] ]
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; OLD_PM-NEXT: [[TMP4:%.*]] = icmp sgt i32 [[ARG]], 10
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; OLD_PM-NEXT: br i1 [[TMP4]], label [[BB5:%.*]], label [[BB7:%.*]]
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; OLD_PM: bb5:
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; OLD_PM-NEXT: [[TMP6:%.*]] = add nsw i32 [[DOT02]], 1
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; OLD_PM-NEXT: br label [[BB9:%.*]]
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; OLD_PM: bb7:
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; OLD_PM-NEXT: [[TMP8:%.*]] = add nsw i32 [[DOT02]], 2
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; OLD_PM-NEXT: br label [[BB9]]
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; OLD_PM: bb9:
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; OLD_PM-NEXT: [[DOT01:%.*]] = phi i32 [ [[TMP6]], [[BB5]] ], [ [[TMP8]], [[BB7]] ]
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; OLD_PM-NEXT: [[TMP10:%.*]] = icmp eq i32 [[DOT01]], 5
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; OLD_PM-NEXT: br i1 [[TMP10]], label [[BB11:%.*]], label [[BB12:%.*]]
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; OLD_PM: bb11:
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; OLD_PM-NEXT: br label [[BB13:%.*]]
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; OLD_PM: bb12:
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; OLD_PM-NEXT: br label [[BB13]]
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; OLD_PM: bb13:
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; OLD_PM-NEXT: [[DOT0:%.*]] = phi i1 [ true, [[BB11]] ], [ false, [[BB12]] ]
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; OLD_PM-NEXT: ret i1 [[DOT0]]
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;
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; NEW_PM-LABEL: define {{[^@]+}}@phi
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; NEW_PM-SAME: (i32 [[ARG:%.*]])
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; NEW_PM-NEXT: bb:
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; NEW_PM-NEXT: [[TMP:%.*]] = icmp sgt i32 [[ARG]], 5
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; NEW_PM-NEXT: br i1 [[TMP]], label [[BB1:%.*]], label [[BB2:%.*]]
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; NEW_PM: bb1:
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; NEW_PM-NEXT: br label [[BB3:%.*]]
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; NEW_PM: bb2:
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; NEW_PM-NEXT: br label [[BB3]]
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; NEW_PM: bb3:
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; NEW_PM-NEXT: [[TMP4:%.*]] = icmp sgt i32 [[ARG]], 10
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; NEW_PM-NEXT: br i1 [[TMP4]], label [[BB5:%.*]], label [[BB7:%.*]]
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; NEW_PM: bb5:
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; NEW_PM-NEXT: br label [[BB9:%.*]]
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; NEW_PM: bb7:
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; NEW_PM-NEXT: br label [[BB9]]
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; NEW_PM: bb9:
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; NEW_PM-NEXT: br label [[BB12:%.*]]
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; NEW_PM: bb11:
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; NEW_PM-NEXT: unreachable
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; NEW_PM: bb12:
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; NEW_PM-NEXT: br label [[BB13:%.*]]
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; NEW_PM: bb13:
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; NEW_PM-NEXT: ret i1 false
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;
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bb:
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%tmp = icmp sgt i32 %arg, 5
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br i1 %tmp, label %bb1, label %bb2
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bb1: ; preds = %bb
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br label %bb3
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bb2: ; preds = %bb
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br label %bb3
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bb3: ; preds = %bb2, %bb1
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%.02 = phi i32 [ 1, %bb1 ], [ 2, %bb2 ]
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%tmp4 = icmp sgt i32 %arg, 10
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br i1 %tmp4, label %bb5, label %bb7
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bb5: ; preds = %bb3
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%tmp6 = add nsw i32 %.02, 1
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br label %bb9
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bb7: ; preds = %bb3
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%tmp8 = add nsw i32 %.02, 2
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br label %bb9
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bb9: ; preds = %bb7, %bb5
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%.01 = phi i32 [ %tmp6, %bb5 ], [ %tmp8, %bb7 ]
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%tmp10 = icmp eq i32 %.01, 5
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br i1 %tmp10, label %bb11, label %bb12
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bb11: ; preds = %bb9
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br label %bb13
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bb12: ; preds = %bb9
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br label %bb13
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bb13: ; preds = %bb12, %bb11
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%.0 = phi i1 [ true, %bb11 ], [ false, %bb12 ]
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ret i1 %.0
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}
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define dso_local i1 @select(i32 %a) local_unnamed_addr #0 {
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; OLD_PM-LABEL: define {{[^@]+}}@select
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; OLD_PM-SAME: (i32 [[A:%.*]]) local_unnamed_addr
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; OLD_PM-NEXT: entry:
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; OLD_PM-NEXT: [[CMP:%.*]] = icmp sgt i32 [[A]], 5
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; OLD_PM-NEXT: [[DOT:%.*]] = select i1 [[CMP]], i32 1, i32 2
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; OLD_PM-NEXT: [[CMP1:%.*]] = icmp sgt i32 [[A]], 10
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; OLD_PM-NEXT: [[Y_0_V:%.*]] = select i1 [[CMP1]], i32 1, i32 2
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; OLD_PM-NEXT: [[Y_0:%.*]] = add nuw nsw i32 [[DOT]], [[Y_0_V]]
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; OLD_PM-NEXT: [[CMP6:%.*]] = icmp eq i32 [[Y_0]], 5
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; OLD_PM-NEXT: ret i1 [[CMP6]]
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;
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; NEW_PM-LABEL: define {{[^@]+}}@select
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; NEW_PM-SAME: (i32 [[A:%.*]]) local_unnamed_addr
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; NEW_PM-NEXT: entry:
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; NEW_PM-NEXT: ret i1 false
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;
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entry:
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%cmp = icmp sgt i32 %a, 5
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%. = select i1 %cmp, i32 1, i32 2
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%cmp1 = icmp sgt i32 %a, 10
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%y.0.v = select i1 %cmp1, i32 1, i32 2
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%y.0 = add nuw nsw i32 %., %y.0.v
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%cmp6 = icmp eq i32 %y.0, 5
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ret i1 %cmp6
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}
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; FIXME: We do not look through the zext here.
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define dso_local i32 @select_zext(i32 %a) local_unnamed_addr #0 {
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; CHECK-LABEL: define {{[^@]+}}@select_zext
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; CHECK-SAME: (i32 [[A:%.*]]) local_unnamed_addr
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[A]], 5
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; CHECK-NEXT: [[DOT:%.*]] = select i1 [[CMP]], i32 1, i32 2
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; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i32 [[A]], 10
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; CHECK-NEXT: [[Y_0_V:%.*]] = select i1 [[CMP1]], i32 1, i32 2
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; CHECK-NEXT: [[Y_0:%.*]] = add nuw nsw i32 [[DOT]], [[Y_0_V]]
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; CHECK-NEXT: [[CMP6:%.*]] = icmp eq i32 [[Y_0]], 5
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; CHECK-NEXT: [[DOT13:%.*]] = zext i1 [[CMP6]] to i32
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; CHECK-NEXT: ret i32 [[DOT13]]
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;
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entry:
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%cmp = icmp sgt i32 %a, 5
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%. = select i1 %cmp, i32 1, i32 2
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%cmp1 = icmp sgt i32 %a, 10
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%y.0.v = select i1 %cmp1, i32 1, i32 2
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%y.0 = add nuw nsw i32 %., %y.0.v
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%cmp6 = icmp eq i32 %y.0, 5
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%.13 = zext i1 %cmp6 to i32
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ret i32 %.13
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}
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; }
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!0 = !{i32 0, i32 10}
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!0 = !{i32 0, i32 10}
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!1 = !{i32 10, i32 100}
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!1 = !{i32 10, i32 100}
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;CHECK: !0 = !{i32 0, i32 10}
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;CHECK: !0 = !{i32 0, i32 10}
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