forked from OSchip/llvm-project
63 lines
2.3 KiB
LLVM
63 lines
2.3 KiB
LLVM
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; RUN: opt %loadPolly -polly-stmt-granularity=scalar-indep -polly-print-instructions -polly-scops -analyze < %s | FileCheck %s -match-full-lines
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;
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; Two PHIs, cross-referencing each other. The PHI READs must be carried-out
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; before the PHI WRITEs to ensure that the value when entering the block is
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; read.
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; This means that either both PHIs have to be in the same statement, or the
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; PHI WRITEs located in a statement after the PHIs.
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;
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; for (int j = 0; j < n; j += 1) {
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; double valA = 42.0;
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; double valB = 21.0;
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;
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; body:
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; double tmp = valA;
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; valA = valB;
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; valB = tmp;
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; A[0] = valA;
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; }
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;
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define void @func(i32 %n, double* noalias nonnull %A) {
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entry:
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br label %for
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for:
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%j = phi i32 [0, %entry], [%j.inc, %for]
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%valA = phi double [42.0, %entry], [%valB, %for]
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%valB = phi double [21.0, %entry], [%valA, %for]
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store double %valA, double* %A
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%j.cmp = icmp slt i32 %j, %n
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%j.inc = add nuw nsw i32 %j, 1
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br i1 %j.cmp, label %for, label %exit
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exit:
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br label %return
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return:
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ret void
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}
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; CHECK: Statements {
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; CHECK-NEXT: Stmt_for
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; CHECK-NEXT: Domain :=
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; CHECK-NEXT: [n] -> { Stmt_for[i0] : 0 <= i0 <= n; Stmt_for[0] : n < 0 };
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; CHECK-NEXT: Schedule :=
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; CHECK-NEXT: [n] -> { Stmt_for[i0] -> [i0] : i0 <= n; Stmt_for[0] -> [0] : n < 0 };
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; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
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; CHECK-NEXT: [n] -> { Stmt_for[i0] -> MemRef_valA__phi[] };
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; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
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; CHECK-NEXT: [n] -> { Stmt_for[i0] -> MemRef_valA__phi[] };
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; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
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; CHECK-NEXT: [n] -> { Stmt_for[i0] -> MemRef_valB__phi[] };
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; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
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; CHECK-NEXT: [n] -> { Stmt_for[i0] -> MemRef_valB__phi[] };
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; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
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; CHECK-NEXT: [n] -> { Stmt_for[i0] -> MemRef_A[0] };
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; CHECK-NEXT: Instructions {
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; CHECK-NEXT: %valA = phi double [ 4.200000e+01, %entry ], [ %valB, %for ]
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; CHECK-NEXT: %valB = phi double [ 2.100000e+01, %entry ], [ %valA, %for ]
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; CHECK-NEXT: store double %valA, double* %A
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; CHECK-NEXT: }
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; CHECK-NEXT: }
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