1; Test that MergeConsecutiveStores() does not during DAG combining 2; incorrectly drop a chain dependency to a store previously chained to 3; one of two combined loads. 4; 5; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s 6 7@A = common global [2048 x float] zeroinitializer, align 4 8 9; Function Attrs: nounwind 10define signext i32 @main(i32 signext %argc, ptr nocapture readnone %argv) #0 { 11entry: 12 br label %for.body 13 14for.body: ; preds = %for.body, %entry 15 %indvars.iv24 = phi i64 [ 0, %entry ], [ %indvars.iv.next25, %for.body ] 16 %sum.018 = phi float [ 0.000000e+00, %entry ], [ %add, %for.body ] 17 %0 = trunc i64 %indvars.iv24 to i32 18 %conv = sitofp i32 %0 to float 19 %arrayidx = getelementptr inbounds [2048 x float], ptr @A, i64 0, i64 %indvars.iv24 20 store float %conv, ptr %arrayidx, align 4 21 %add = fadd float %sum.018, %conv 22 %indvars.iv.next25 = add nuw nsw i64 %indvars.iv24, 1 23 %exitcond26 = icmp eq i64 %indvars.iv.next25, 2048 24 br i1 %exitcond26, label %for.end, label %for.body 25 26for.end: ; preds = %for.body 27 br label %for.body.3.lr.ph.i.preheader 28 29for.body.3.lr.ph.i.preheader: ; preds = %complex_transpose.exit, %for.end 30 %i.116 = phi i32 [ 0, %for.end ], [ %inc9, %complex_transpose.exit ] 31 br label %for.body.3.lr.ph.i 32 33for.body.3.lr.ph.i: ; preds = %for.body.3.lr.ph.i.preheader, %for.inc.40.i 34 %indvars.iv19 = phi i32 [ 1, %for.body.3.lr.ph.i.preheader ], [ %indvars.iv.next20, %for.inc.40.i ] 35 %indvars.iv57.i = phi i64 [ 1, %for.body.3.lr.ph.i.preheader ], [ %indvars.iv.next58.i, %for.inc.40.i ] 36 %1 = shl nsw i64 %indvars.iv57.i, 1 37 %2 = shl nsw i64 %indvars.iv57.i, 6 38 br label %for.body.3.i 39 40for.body.3.i: ; preds = %for.body.3.i, %for.body.3.lr.ph.i 41; CHECK-LABEL: .LBB0_5: 42; CHECK-NOT: stfh %r{{.*}}, 0(%r{{.*}}) 43; CHECK: lg %r{{.*}}, 8(%r{{.*}}) 44; Overlapping load should go before the store 45 %indvars.iv.i = phi i64 [ 0, %for.body.3.lr.ph.i ], [ %indvars.iv.next.i, %for.body.3.i ] 46 %3 = shl nsw i64 %indvars.iv.i, 6 47 %4 = add nuw nsw i64 %3, %1 48 %arrayidx.i = getelementptr inbounds [2048 x float], ptr @A, i64 0, i64 %4 49 %5 = load i32, ptr %arrayidx.i, align 4 50 %arrayidx9.i = getelementptr inbounds float, ptr getelementptr inbounds ([2048 x float], ptr @A, i64 0, i64 1), i64 %4 51 %6 = load i32, ptr %arrayidx9.i, align 4 52 %7 = shl nsw i64 %indvars.iv.i, 1 53 %8 = add nuw nsw i64 %7, %2 54 %arrayidx14.i = getelementptr inbounds [2048 x float], ptr @A, i64 0, i64 %8 55 %9 = load i32, ptr %arrayidx14.i, align 4 56 %arrayidx19.i = getelementptr inbounds float, ptr getelementptr inbounds ([2048 x float], ptr @A, i64 0, i64 1), i64 %8 57 %10 = load i32, ptr %arrayidx19.i, align 4 58 store i32 %5, ptr %arrayidx14.i, align 4 59 store i32 %6, ptr %arrayidx19.i, align 4 60 store i32 %9, ptr %arrayidx.i, align 4 61 store i32 %10, ptr %arrayidx9.i, align 4 62 %indvars.iv.next.i = add nuw nsw i64 %indvars.iv.i, 1 63 %lftr.wideiv = trunc i64 %indvars.iv.next.i to i32 64 %exitcond21 = icmp eq i32 %lftr.wideiv, %indvars.iv19 65 br i1 %exitcond21, label %for.inc.40.i, label %for.body.3.i 66 67for.inc.40.i: ; preds = %for.body.3.i 68 %indvars.iv.next58.i = add nuw nsw i64 %indvars.iv57.i, 1 69 %indvars.iv.next20 = add nuw nsw i32 %indvars.iv19, 1 70 %exitcond22 = icmp eq i64 %indvars.iv.next58.i, 32 71 br i1 %exitcond22, label %complex_transpose.exit, label %for.body.3.lr.ph.i 72 73complex_transpose.exit: ; preds = %for.inc.40.i 74 %inc9 = add nuw nsw i32 %i.116, 1 75 %exitcond23 = icmp eq i32 %inc9, 10 76 br i1 %exitcond23, label %for.body.14.preheader, label %for.body.3.lr.ph.i.preheader 77 78for.body.14.preheader: ; preds = %complex_transpose.exit 79 br label %for.body.14 80 81for.body.14: ; preds = %for.body.14.preheader, %for.body.14 82 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body.14 ], [ 0, %for.body.14.preheader ] 83 %sum.115 = phi float [ %add17, %for.body.14 ], [ 0.000000e+00, %for.body.14.preheader ] 84 %arrayidx16 = getelementptr inbounds [2048 x float], ptr @A, i64 0, i64 %indvars.iv 85 %11 = load float, ptr %arrayidx16, align 4 86 %add17 = fadd float %sum.115, %11 87 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 88 %exitcond = icmp eq i64 %indvars.iv.next, 2048 89 br i1 %exitcond, label %for.end.20, label %for.body.14 90 91for.end.20: ; preds = %for.body.14 92 ret i32 0 93} 94