granularity_scalar-indep_cross-referencing-phi1.ll
2.34 KB
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; RUN: opt %loadPolly -polly-stmt-granularity=scalar-indep -polly-print-instructions -polly-scops -analyze < %s | FileCheck %s -match-full-lines
;
; Two PHIs, cross-referencing each other. The PHI READs must be carried-out
; before the PHI WRITEs to ensure that the value when entering the block is
; read.
; This means that either both PHIs have to be in the same statement, or the
; PHI WRITEs located in a statement after the PHIs.
;
; for (int j = 0; j < n; j += 1) {
; double valA = 42.0;
; double valB = 21.0;
;
; body:
; double tmp = valA;
; valA = valB;
; valB = tmp;
; A[0] = valA;
; }
;
define void @func(i32 %n, double* noalias nonnull %A) {
entry:
br label %for
for:
%j = phi i32 [0, %entry], [%j.inc, %for]
%valA = phi double [42.0, %entry], [%valB, %for]
%valB = phi double [21.0, %entry], [%valA, %for]
store double %valA, double* %A
%j.cmp = icmp slt i32 %j, %n
%j.inc = add nuw nsw i32 %j, 1
br i1 %j.cmp, label %for, label %exit
exit:
br label %return
return:
ret void
}
; CHECK: Statements {
; CHECK-NEXT: Stmt_for
; CHECK-NEXT: Domain :=
; CHECK-NEXT: [n] -> { Stmt_for[i0] : 0 <= i0 <= n; Stmt_for[0] : n < 0 };
; CHECK-NEXT: Schedule :=
; CHECK-NEXT: [n] -> { Stmt_for[i0] -> [i0] : i0 <= n; Stmt_for[0] -> [0] : n < 0 };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: [n] -> { Stmt_for[i0] -> MemRef_valA__phi[] };
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: [n] -> { Stmt_for[i0] -> MemRef_valA__phi[] };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: [n] -> { Stmt_for[i0] -> MemRef_valB__phi[] };
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: [n] -> { Stmt_for[i0] -> MemRef_valB__phi[] };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: [n] -> { Stmt_for[i0] -> MemRef_A[0] };
; CHECK-NEXT: Instructions {
; CHECK-NEXT: %valA = phi double [ 4.200000e+01, %entry ], [ %valB, %for ]
; CHECK-NEXT: %valB = phi double [ 2.100000e+01, %entry ], [ %valA, %for ]
; CHECK-NEXT: store double %valA, double* %A, align 8
; CHECK-NEXT: }
; CHECK-NEXT: }