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