71 lines
2.3 KiB
LLVM
71 lines
2.3 KiB
LLVM
; RUN: opt < %s -analyze -delinearize | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i1:32-i64:64-a:0-n32"
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; Check that division by 1 can be delinearized.
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;
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; void test1(unsigned char *dst, int stride, int bs) {
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; for (int r = bs; r >= 0; --r)
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; for (int c = 0; c < bs; ++c)
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; dst[r * stride + c] = dst[(r + 1) * stride + c - 1];
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; }
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; AddRec: {{(-1 + ((1 + %bs) * %stride)),+,(-1 * %stride)}<%for.cond1.preheader>,+,1}<nw><%for.body3>
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; CHECK: Inst: %0 = load i8, i8* %arrayidx, align 1
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; CHECK: Base offset: %dst
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; CHECK: ArrayDecl[UnknownSize][%stride] with elements of 1 bytes.
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; CHECK: ArrayRef[{(1 + %bs),+,-1}<nw><%for.cond1.preheader>][{-1,+,1}<nw><%for.body3>]
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; AddRec: {{(%stride * %bs),+,(-1 * %stride)}<%for.cond1.preheader>,+,1}<nw><%for.body3>
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; CHECK: Inst: store i8 %0, i8* %arrayidx7, align 1
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; CHECK: Base offset: %dst
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; CHECK: ArrayDecl[UnknownSize][%stride] with elements of 1 bytes.
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; CHECK: ArrayRef[{%bs,+,-1}<nsw><%for.cond1.preheader>][{0,+,1}<nuw><nsw><%for.body3>]
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define void @test(i8* nocapture %dst, i32 %stride, i32 %bs) {
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entry:
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%cmp20 = icmp sgt i32 %bs, -1
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br i1 %cmp20, label %for.cond1.preheader.lr.ph, label %for.end9
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for.cond1.preheader.lr.ph:
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%cmp218 = icmp slt i32 0, %bs
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br label %for.cond1.preheader
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for.cond1.preheader:
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%r.021 = phi i32 [ %bs, %for.cond1.preheader.lr.ph ], [ %dec, %for.inc8 ]
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br i1 %cmp218, label %for.body3.lr.ph, label %for.inc8
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for.body3.lr.ph:
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%add = add nsw i32 %r.021, 1
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%mul = mul nsw i32 %add, %stride
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%add4 = add i32 %mul, -1
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%mul5 = mul nsw i32 %r.021, %stride
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br label %for.body3
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for.body3:
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%c.019 = phi i32 [ 0, %for.body3.lr.ph ], [ %inc, %for.body3 ]
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%sub = add i32 %add4, %c.019
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%arrayidx = getelementptr inbounds i8, i8* %dst, i32 %sub
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%0 = load i8, i8* %arrayidx, align 1
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%add6 = add nsw i32 %c.019, %mul5
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%arrayidx7 = getelementptr inbounds i8, i8* %dst, i32 %add6
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store i8 %0, i8* %arrayidx7, align 1
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%inc = add nsw i32 %c.019, 1
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%cmp2 = icmp slt i32 %inc, %bs
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br i1 %cmp2, label %for.body3, label %for.cond1.for.inc8_crit_edge
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for.cond1.for.inc8_crit_edge:
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br label %for.inc8
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for.inc8:
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%dec = add nsw i32 %r.021, -1
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%cmp = icmp sgt i32 %dec, -1
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br i1 %cmp, label %for.cond1.preheader, label %for.cond.for.end9_crit_edge
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for.cond.for.end9_crit_edge:
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br label %for.end9
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for.end9:
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ret void
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}
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