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https://github.com/c64scene-ar/llvm-6502.git
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5e66eea5ba
Before, we where looking at the size of the pointer type that specifies the location from which to load the element. This did not make any sense at all. This change fixes a bug in the delinearization where we failed to delinerize certain load instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210435 91177308-0d34-0410-b5e6-96231b3b80d8
52 lines
1.5 KiB
LLVM
52 lines
1.5 KiB
LLVM
; RUN: opt < %s -analyze -delinearize | FileCheck %s
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; Derived from the following code:
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;
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; void foo(long n, long m, double A[n][m]) {
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; for (long i = 0; i < n; i++)
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; for (long j = 0; j < m; j++)
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; A[i][j] = 1.0;
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; }
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; Inst: %val = load double* %arrayidx
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; In Loop with Header: for.j
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; AddRec: {{0,+,(%m * sizeof(double))}<%for.i>,+,sizeof(double)}<%for.j>
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; Base offset: %A
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; ArrayDecl[UnknownSize][%m] with elements of sizeof(double) bytes.
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; ArrayRef[{0,+,1}<nuw><nsw><%for.i>][{0,+,1}<nuw><nsw><%for.j>]
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; Inst: store double %val, double* %arrayidx
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; In Loop with Header: for.j
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; AddRec: {{%A,+,(8 * %m)}<%for.i>,+,8}<%for.j>
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; CHECK: Base offset: %A
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; CHECK: ArrayDecl[UnknownSize][%m] with elements of sizeof(double) bytes.
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; CHECK: ArrayRef[{0,+,1}<nuw><nsw><%for.i>][{0,+,1}<nuw><nsw><%for.j>]
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define void @foo(i64 %n, i64 %m, double* %A) {
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entry:
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br label %for.i
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for.i:
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%i = phi i64 [ 0, %entry ], [ %i.inc, %for.i.inc ]
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%tmp = mul nsw i64 %i, %m
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br label %for.j
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for.j:
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%j = phi i64 [ 0, %for.i ], [ %j.inc, %for.j ]
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%vlaarrayidx.sum = add i64 %j, %tmp
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%arrayidx = getelementptr inbounds double* %A, i64 %vlaarrayidx.sum
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%val = load double* %arrayidx
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store double %val, double* %arrayidx
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%j.inc = add nsw i64 %j, 1
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%j.exitcond = icmp eq i64 %j.inc, %m
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br i1 %j.exitcond, label %for.i.inc, label %for.j
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for.i.inc:
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%i.inc = add nsw i64 %i, 1
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%i.exitcond = icmp eq i64 %i.inc, %n
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br i1 %i.exitcond, label %end, label %for.i
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end:
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ret void
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}
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