1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -basicaa -newgvn -S < %s | FileCheck %s 3 4; Function Attrs: noinline norecurse nounwind readonly ssp uwtable 5define i32 @mp_unsgn_cmp(i32 %n, i32* nocapture readonly %in1, i32* nocapture readonly %in2) local_unnamed_addr { 6; CHECK-LABEL: @mp_unsgn_cmp( 7; CHECK-NEXT: entry: 8; CHECK-NEXT: [[CMP11:%.*]] = icmp sgt i32 [[N:%.*]], -1 9; CHECK-NEXT: br i1 [[CMP11]], label [[FOR_INC_PREHEADER:%.*]], label [[IF_ELSE:%.*]] 10; CHECK: for.inc.preheader: 11; CHECK-NEXT: br label [[FOR_INC:%.*]] 12; CHECK: for.inc: 13; CHECK-NEXT: [[STOREMERGE2:%.*]] = phi i32 [ [[INC:%.*]], [[FOR_INC]] ], [ 0, [[FOR_INC_PREHEADER]] ] 14; CHECK-NEXT: [[IDXPROM:%.*]] = sext i32 [[STOREMERGE2]] to i64 15; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[IN1:%.*]], i64 [[IDXPROM]] 16; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* [[ARRAYIDX]], align 4 17; CHECK-NEXT: [[ARRAYIDX4:%.*]] = getelementptr inbounds i32, i32* [[IN2:%.*]], i64 [[IDXPROM]] 18; CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* [[ARRAYIDX4]], align 4 19; CHECK-NEXT: [[SUB:%.*]] = sub nsw i32 [[TMP0]], [[TMP1]] 20; CHECK-NEXT: [[INC]] = add nsw i32 [[STOREMERGE2]], 1 21; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[STOREMERGE2]], [[N]] 22; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i32 [[SUB]], 0 23; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[CMP2]], [[CMP1]] 24; CHECK-NEXT: br i1 [[OR_COND]], label [[FOR_INC]], label [[FOR_END:%.*]] 25; CHECK: for.end: 26; CHECK-NEXT: [[CMP5:%.*]] = icmp sgt i32 [[SUB]], 0 27; CHECK-NEXT: br i1 [[CMP5]], label [[IF_END8:%.*]], label [[IF_ELSE]] 28; CHECK: if.else: 29; CHECK-NEXT: [[SUB1_LCSSA4:%.*]] = phi i32 [ [[SUB]], [[FOR_END]] ], [ 0, [[ENTRY:%.*]] ] 30; CHECK-NEXT: [[CMP6:%.*]] = icmp slt i32 [[SUB1_LCSSA4]], 0 31; CHECK-NEXT: [[DOTSUB1_LCSSA:%.*]] = select i1 [[CMP6]], i32 -1, i32 [[SUB1_LCSSA4]] 32; CHECK-NEXT: ret i32 [[DOTSUB1_LCSSA]] 33; CHECK: if.end8: 34; CHECK-NEXT: ret i32 1 35; 36entry: 37 %cmp11 = icmp sgt i32 %n, -1 38 br i1 %cmp11, label %for.inc.preheader, label %if.else 39 40for.inc.preheader: ; preds = %entry 41 br label %for.inc 42 43for.inc: ; preds = %for.inc.preheader, %for.inc 44 %storemerge2 = phi i32 [ %inc, %for.inc ], [ 0, %for.inc.preheader ] 45 %idxprom = sext i32 %storemerge2 to i64 46 %arrayidx = getelementptr inbounds i32, i32* %in1, i64 %idxprom 47 %0 = load i32, i32* %arrayidx, align 4 48 %arrayidx4 = getelementptr inbounds i32, i32* %in2, i64 %idxprom 49 %1 = load i32, i32* %arrayidx4, align 4 50 %sub = sub nsw i32 %0, %1 51 %inc = add nsw i32 %storemerge2, 1 52 %cmp1 = icmp slt i32 %storemerge2, %n 53 %cmp2 = icmp eq i32 %sub, 0 54 %or.cond = and i1 %cmp2, %cmp1 55;; This is a self-critical edge to for.inc. If we insert predicate info on it, we will insert 56;; predicateinfo at the end of this block, and think it dominates everthing using only dfs 57;; numbers, instead of proper edge dominance. We would then proceed to propagate the true value 58;; of sub == 0 everywhere, making this function only ever return 0. 59 br i1 %or.cond, label %for.inc, label %for.end 60 61for.end: ; preds = %for.inc 62 %sub.lcssa = phi i32 [ %sub, %for.inc ] 63 %cmp5 = icmp sgt i32 %sub.lcssa, 0 64 br i1 %cmp5, label %if.end8, label %if.else 65 66if.else: ; preds = %entry, %for.end 67 %sub1.lcssa4 = phi i32 [ %sub.lcssa, %for.end ], [ 0, %entry ] 68 %cmp6 = icmp slt i32 %sub1.lcssa4, 0 69 %.sub1.lcssa = select i1 %cmp6, i32 -1, i32 %sub1.lcssa4 70 ret i32 %.sub1.lcssa 71 72if.end8: ; preds = %for.end 73 ret i32 1 74} 75 76 77;; This test will generate a copy of a copy of predicateinfo to the multiple uses 78;; of branch conditions below. Make sure we don't try to extract operand info. 79; Function Attrs: uwtable 80define fastcc void @barney() { 81; CHECK-LABEL: @barney( 82; CHECK-NEXT: bb: 83; CHECK-NEXT: br label [[BB22:%.*]] 84; CHECK: bb22: 85; CHECK-NEXT: br i1 undef, label [[BB29:%.*]], label [[BB35:%.*]] 86; CHECK: bb29: 87; CHECK-NEXT: br i1 true, label [[BB33:%.*]], label [[BB35]] 88; CHECK: bb33: 89; CHECK-NEXT: br i1 true, label [[BB35]], label [[BB35]] 90; CHECK: bb35: 91; CHECK-NEXT: unreachable 92; 93bb: 94 br label %bb22 95bb22: ; preds = %bb21 96 %tmp23 = icmp eq i32 undef, 2 97 br i1 %tmp23, label %bb29, label %bb35 98 99 100bb29: ; preds = %bb28 101 br i1 %tmp23, label %bb33, label %bb35 102 103 104bb33: ; preds = %bb31 105 br i1 %tmp23, label %bb35, label %bb35 106 107 108bb35: ; preds = %bb33, %bb29, %bb22 109 unreachable 110} 111 112