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98 lines
4.7 KiB
98 lines
4.7 KiB
; Test that MergeConsecutiveStores() does not during DAG combining
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; incorrectly drop a chain dependency to a store previously chained to
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; one of two combined loads.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
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@A = common global [2048 x float] zeroinitializer, align 4
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; Function Attrs: nounwind
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define signext i32 @main(i32 signext %argc, i8** nocapture readnone %argv) #0 {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv24 = phi i64 [ 0, %entry ], [ %indvars.iv.next25, %for.body ]
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%sum.018 = phi float [ 0.000000e+00, %entry ], [ %add, %for.body ]
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%0 = trunc i64 %indvars.iv24 to i32
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%conv = sitofp i32 %0 to float
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%arrayidx = getelementptr inbounds [2048 x float], [2048 x float]* @A, i64 0, i64 %indvars.iv24
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store float %conv, float* %arrayidx, align 4
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%add = fadd float %sum.018, %conv
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%indvars.iv.next25 = add nuw nsw i64 %indvars.iv24, 1
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%exitcond26 = icmp eq i64 %indvars.iv.next25, 2048
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br i1 %exitcond26, label %for.end, label %for.body
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for.end: ; preds = %for.body
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br label %for.body.3.lr.ph.i.preheader
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for.body.3.lr.ph.i.preheader: ; preds = %complex_transpose.exit, %for.end
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%i.116 = phi i32 [ 0, %for.end ], [ %inc9, %complex_transpose.exit ]
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br label %for.body.3.lr.ph.i
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for.body.3.lr.ph.i: ; preds = %for.body.3.lr.ph.i.preheader, %for.inc.40.i
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%indvars.iv19 = phi i32 [ 1, %for.body.3.lr.ph.i.preheader ], [ %indvars.iv.next20, %for.inc.40.i ]
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%indvars.iv57.i = phi i64 [ 1, %for.body.3.lr.ph.i.preheader ], [ %indvars.iv.next58.i, %for.inc.40.i ]
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%1 = shl nsw i64 %indvars.iv57.i, 1
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%2 = shl nsw i64 %indvars.iv57.i, 6
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br label %for.body.3.i
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for.body.3.i: ; preds = %for.body.3.i, %for.body.3.lr.ph.i
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; CHECK-LABEL: .LBB0_5:
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; CHECK-NOT: stfh %r{{.*}}, 0(%r{{.*}})
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; CHECK: lg %r{{.*}}, 8(%r{{.*}})
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; Overlapping load should go before the store
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%indvars.iv.i = phi i64 [ 0, %for.body.3.lr.ph.i ], [ %indvars.iv.next.i, %for.body.3.i ]
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%3 = shl nsw i64 %indvars.iv.i, 6
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%4 = add nuw nsw i64 %3, %1
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%arrayidx.i = getelementptr inbounds [2048 x float], [2048 x float]* @A, i64 0, i64 %4
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%5 = bitcast float* %arrayidx.i to i32*
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%6 = load i32, i32* %5, align 4
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%arrayidx9.i = getelementptr inbounds float, float* getelementptr inbounds ([2048 x float], [2048 x float]* @A, i64 0, i64 1), i64 %4
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%7 = bitcast float* %arrayidx9.i to i32*
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%8 = load i32, i32* %7, align 4
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%9 = shl nsw i64 %indvars.iv.i, 1
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%10 = add nuw nsw i64 %9, %2
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%arrayidx14.i = getelementptr inbounds [2048 x float], [2048 x float]* @A, i64 0, i64 %10
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%11 = bitcast float* %arrayidx14.i to i32*
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%12 = load i32, i32* %11, align 4
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%arrayidx19.i = getelementptr inbounds float, float* getelementptr inbounds ([2048 x float], [2048 x float]* @A, i64 0, i64 1), i64 %10
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%13 = bitcast float* %arrayidx19.i to i32*
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%14 = load i32, i32* %13, align 4
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store i32 %6, i32* %11, align 4
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store i32 %8, i32* %13, align 4
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store i32 %12, i32* %5, align 4
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store i32 %14, i32* %7, align 4
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%indvars.iv.next.i = add nuw nsw i64 %indvars.iv.i, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next.i to i32
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%exitcond21 = icmp eq i32 %lftr.wideiv, %indvars.iv19
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br i1 %exitcond21, label %for.inc.40.i, label %for.body.3.i
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for.inc.40.i: ; preds = %for.body.3.i
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%indvars.iv.next58.i = add nuw nsw i64 %indvars.iv57.i, 1
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%indvars.iv.next20 = add nuw nsw i32 %indvars.iv19, 1
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%exitcond22 = icmp eq i64 %indvars.iv.next58.i, 32
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br i1 %exitcond22, label %complex_transpose.exit, label %for.body.3.lr.ph.i
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complex_transpose.exit: ; preds = %for.inc.40.i
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%inc9 = add nuw nsw i32 %i.116, 1
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%exitcond23 = icmp eq i32 %inc9, 10
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br i1 %exitcond23, label %for.body.14.preheader, label %for.body.3.lr.ph.i.preheader
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for.body.14.preheader: ; preds = %complex_transpose.exit
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br label %for.body.14
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for.body.14: ; preds = %for.body.14.preheader, %for.body.14
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body.14 ], [ 0, %for.body.14.preheader ]
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%sum.115 = phi float [ %add17, %for.body.14 ], [ 0.000000e+00, %for.body.14.preheader ]
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%arrayidx16 = getelementptr inbounds [2048 x float], [2048 x float]* @A, i64 0, i64 %indvars.iv
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%15 = load float, float* %arrayidx16, align 4
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%add17 = fadd float %sum.115, %15
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 2048
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br i1 %exitcond, label %for.end.20, label %for.body.14
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for.end.20: ; preds = %for.body.14
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ret i32 0
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}
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