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c40eb525ad
bug fixes, and with improved heuristics for analyzing foreign-loop addrecs. This change also flattens IVUsers, eliminating the stride-oriented groupings, which makes it easier to work with. llvm-svn: 95975
43 lines
1.6 KiB
LLVM
43 lines
1.6 KiB
LLVM
; RUN: opt < %s -loop-reduce -S | FileCheck %s
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; rdar://7382068
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define void @t(i32 %c) nounwind optsize {
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entry:
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br label %bb6
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bb1: ; preds = %bb6
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%tmp = icmp eq i32 %c_addr.1, 20 ; <i1> [#uses=1]
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br i1 %tmp, label %bb2, label %bb3
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bb2: ; preds = %bb1
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%tmp1 = tail call i32 @f20(i32 %c_addr.1) nounwind ; <i32> [#uses=1]
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br label %bb7
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bb3: ; preds = %bb1
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%tmp2 = icmp slt i32 %c_addr.1, 10 ; <i1> [#uses=1]
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%tmp3 = add nsw i32 %c_addr.1, 1 ; <i32> [#uses=1]
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%tmp4 = add i32 %c_addr.1, -1 ; <i32> [#uses=1]
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%c_addr.1.be = select i1 %tmp2, i32 %tmp3, i32 %tmp4 ; <i32> [#uses=1]
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%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1]
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; CHECK: add i32 %lsr.iv, -1
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br label %bb6
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bb6: ; preds = %bb3, %entry
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%indvar = phi i32 [ %indvar.next, %bb3 ], [ 0, %entry ] ; <i32> [#uses=2]
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%c_addr.1 = phi i32 [ %c_addr.1.be, %bb3 ], [ %c, %entry ] ; <i32> [#uses=7]
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%tmp5 = icmp eq i32 %indvar, 9999 ; <i1> [#uses=1]
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; CHECK: icmp eq i32 %lsr.iv, 0
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%tmp6 = icmp eq i32 %c_addr.1, 100 ; <i1> [#uses=1]
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%or.cond = or i1 %tmp5, %tmp6 ; <i1> [#uses=1]
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br i1 %or.cond, label %bb7, label %bb1
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bb7: ; preds = %bb6, %bb2
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%c_addr.0 = phi i32 [ %tmp1, %bb2 ], [ %c_addr.1, %bb6 ] ; <i32> [#uses=1]
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tail call void @bar(i32 %c_addr.0) nounwind
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ret void
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}
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declare i32 @f20(i32)
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declare void @bar(i32)
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