| ; 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], [%add, %for] |
| store double %valB, double* %A |
| %add = fadd double %valA, 0.1 |
| %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 ], [ %add, %for ] |
| ; CHECK-NEXT: store double %valB, double* %A |
| ; CHECK-NEXT: %add = fadd double %valA, 1.000000e-01 |
| ; CHECK-NEXT: } |
| ; CHECK-NEXT: } |