20d798bd47
This reverts commit 1fbdbb5595.
All known issues surfaced by this patch should have been fixed now.
The fixes included fixing issues with SCEV expansion in LV and DA's
reliance on LCSSA phis.
38 lines
1.2 KiB
LLVM
38 lines
1.2 KiB
LLVM
; RUN: opt < %s -disable-output "-passes=print<da>" \
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; RUN: "-aa-pipeline=basic-aa,tbaa" 2>&1 | FileCheck %s
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; CHECK: Src: %v = load i32, i32* %arrayidx1, align 4 --> Dst: store i32 %add, i32* %a.lcssa, align 4
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; CHECK-NEXT: da analyze - anti [*|<]!
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define void @f(i32 *%a, i32 %n, i64 %n2) {
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entry:
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br label %while.body
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while.body:
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%n.addr = phi i32 [ %mul, %while.body ], [ %n, %entry ]
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%inc.phi = phi i32 [ %inc, %while.body ], [ 0, %entry ]
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%mul = mul i32 %n.addr, 3
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%div = udiv i32 %mul, 2
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%inc = add i32 %inc.phi, 1
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%incdec.ptr = getelementptr inbounds i32, i32* %a, i32 %inc
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%cmp.not = icmp eq i32 %div, 1
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br i1 %cmp.not, label %while.end, label %while.body
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while.end:
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%a.lcssa = phi i32* [ %incdec.ptr, %while.body ]
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br label %for.body
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for.body:
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%indvars.iv = phi i64 [ 1, %while.end ], [ %indvars.iv.next, %for.body ]
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%arrayidx1 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%v = load i32, i32* %arrayidx1, align 4
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%add = add nsw i32 %v, 1
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store i32 %add, i32* %a.lcssa, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond.not = icmp eq i64 %indvars.iv.next, %n2
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br i1 %exitcond.not, label %ret, label %for.body
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ret:
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ret void
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}
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