1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -passes='loop-mssa(indvars,indvars)' -S < %s | FileCheck %s 3 4target triple = "x86_64-unknown-linux-gnu" 5 6@c = external global i16, align 1 7@a = external global i16, align 1 8 9; When we delete %c.promoted, we need to ensure we clear the getSCEVAtScope 10; cache or we'll crash trying to access loop disposition of the exit value 11; for the remaining IV. 12define void @f() { 13; CHECK-LABEL: @f( 14; CHECK-NEXT: entry: 15; CHECK-NEXT: br label [[FOR_COND:%.*]] 16; CHECK: for.cond: 17; CHECK-NEXT: br i1 false, label [[FOR_BODY:%.*]], label [[FOR_END4:%.*]] 18; CHECK: for.body: 19; CHECK-NEXT: br label [[FOR_BODY2:%.*]] 20; CHECK: for.body2: 21; CHECK-NEXT: [[INC2:%.*]] = phi i16 [ undef, [[FOR_BODY]] ], [ [[INC:%.*]], [[FOR_BODY2]] ] 22; CHECK-NEXT: [[INC]] = add nuw nsw i16 [[INC2]], 1 23; CHECK-NEXT: store i16 [[INC]], ptr undef, align 1 24; CHECK-NEXT: br i1 true, label [[FOR_BODY2]], label [[CRIT_EDGE:%.*]] 25; CHECK: crit_edge: 26; CHECK-NEXT: [[INC_LCSSA:%.*]] = phi i16 [ [[INC]], [[FOR_BODY2]] ] 27; CHECK-NEXT: store i16 [[INC_LCSSA]], ptr @a, align 1 28; CHECK-NEXT: unreachable 29; CHECK: for.end4: 30; CHECK-NEXT: ret void 31; 32entry: 33 br label %for.cond 34 35for.cond: ; preds = %entry 36 br i1 false, label %for.body, label %for.end4 37 38for.body: ; preds = %for.cond 39 %c.promoted = load i16, ptr @c, align 1 40 br label %for.body2 41 42for.body2: ; preds = %for.body2, %for.body 43 %inc33 = phi i16 [ %c.promoted, %for.body ], [ %inc3, %for.body2 ] 44 %inc2 = phi i16 [ undef, %for.body ], [ %inc, %for.body2 ] 45 %inc = add nsw i16 %inc2, 1 46 store i16 %inc, ptr undef, align 1 47 %inc3 = add nsw i16 %inc33, 1 48 %tobool = icmp ne i16 %inc3, 0 49 br i1 %tobool, label %for.body2, label %crit_edge 50 51crit_edge: ; preds = %for.body2 52 %inc.lcssa = phi i16 [ %inc, %for.body2 ] 53 store i16 %inc.lcssa, ptr @a, align 1 54 unreachable 55 56for.end4: ; preds = %for.cond 57 ret void 58} 59