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98 lines
3.8 KiB
LLVM
98 lines
3.8 KiB
LLVM
; RUN: opt -loop-reduce -S < %s | FileCheck %s
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; We find it is very bad to allow LSR formula containing SCEVAddRecExpr Reg
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; from siblings of current loop. When one loop is LSR optimized, it can
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; insert lsr.iv for other sibling loops, which sometimes leads to many extra
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; lsr.iv inserted for loops.
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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@cond = common local_unnamed_addr global i64 0, align 8
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; Check there is no extra lsr.iv generated in foo.
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; CHECK-LABEL: @foo(
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; CHECK-NOT: lsr.iv{{[0-9]+}} =
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;
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define void @foo(i64 %N) local_unnamed_addr {
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entry:
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br label %do.body
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do.body: ; preds = %do.body, %entry
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%i.0 = phi i64 [ 0, %entry ], [ %inc, %do.body ]
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tail call void @goo(i64 %i.0, i64 %i.0)
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%inc = add nuw nsw i64 %i.0, 1
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%t0 = load i64, i64* @cond, align 8
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%tobool = icmp eq i64 %t0, 0
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br i1 %tobool, label %do.body2.preheader, label %do.body
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do.body2.preheader: ; preds = %do.body
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br label %do.body2
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do.body2: ; preds = %do.body2.preheader, %do.body2
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%i.1 = phi i64 [ %inc3, %do.body2 ], [ 0, %do.body2.preheader ]
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%j.1 = phi i64 [ %inc4, %do.body2 ], [ %inc, %do.body2.preheader ]
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tail call void @goo(i64 %i.1, i64 %j.1)
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%inc3 = add nuw nsw i64 %i.1, 1
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%inc4 = add nsw i64 %j.1, 1
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%t1 = load i64, i64* @cond, align 8
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%tobool6 = icmp eq i64 %t1, 0
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br i1 %tobool6, label %do.body8.preheader, label %do.body2
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do.body8.preheader: ; preds = %do.body2
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br label %do.body8
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do.body8: ; preds = %do.body8.preheader, %do.body8
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%i.2 = phi i64 [ %inc9, %do.body8 ], [ 0, %do.body8.preheader ]
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%j.2 = phi i64 [ %inc10, %do.body8 ], [ %inc4, %do.body8.preheader ]
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tail call void @goo(i64 %i.2, i64 %j.2)
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%inc9 = add nuw nsw i64 %i.2, 1
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%inc10 = add nsw i64 %j.2, 1
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%t2 = load i64, i64* @cond, align 8
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%tobool12 = icmp eq i64 %t2, 0
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br i1 %tobool12, label %do.body14.preheader, label %do.body8
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do.body14.preheader: ; preds = %do.body8
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br label %do.body14
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do.body14: ; preds = %do.body14.preheader, %do.body14
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%i.3 = phi i64 [ %inc15, %do.body14 ], [ 0, %do.body14.preheader ]
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%j.3 = phi i64 [ %inc16, %do.body14 ], [ %inc10, %do.body14.preheader ]
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tail call void @goo(i64 %i.3, i64 %j.3)
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%inc15 = add nuw nsw i64 %i.3, 1
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%inc16 = add nsw i64 %j.3, 1
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%t3 = load i64, i64* @cond, align 8
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%tobool18 = icmp eq i64 %t3, 0
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br i1 %tobool18, label %do.body20.preheader, label %do.body14
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do.body20.preheader: ; preds = %do.body14
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br label %do.body20
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do.body20: ; preds = %do.body20.preheader, %do.body20
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%i.4 = phi i64 [ %inc21, %do.body20 ], [ 0, %do.body20.preheader ]
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%j.4 = phi i64 [ %inc22, %do.body20 ], [ %inc16, %do.body20.preheader ]
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tail call void @goo(i64 %i.4, i64 %j.4)
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%inc21 = add nuw nsw i64 %i.4, 1
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%inc22 = add nsw i64 %j.4, 1
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%t4 = load i64, i64* @cond, align 8
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%tobool24 = icmp eq i64 %t4, 0
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br i1 %tobool24, label %do.body26.preheader, label %do.body20
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do.body26.preheader: ; preds = %do.body20
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br label %do.body26
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do.body26: ; preds = %do.body26.preheader, %do.body26
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%i.5 = phi i64 [ %inc27, %do.body26 ], [ 0, %do.body26.preheader ]
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%j.5 = phi i64 [ %inc28, %do.body26 ], [ %inc22, %do.body26.preheader ]
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tail call void @goo(i64 %i.5, i64 %j.5)
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%inc27 = add nuw nsw i64 %i.5, 1
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%inc28 = add nsw i64 %j.5, 1
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%t5 = load i64, i64* @cond, align 8
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%tobool30 = icmp eq i64 %t5, 0
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br i1 %tobool30, label %do.end31, label %do.body26
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do.end31: ; preds = %do.body26
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ret void
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}
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declare void @goo(i64, i64) local_unnamed_addr
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