llvm-project/polly/test/Isl/Ast/reduction_loop_reversal.ll

71 lines
2.2 KiB
LLVM

; RUN: opt %loadPolly -polly-import-jscop -polly-ast -polly-ast-detect-parallel -analyze < %s | FileCheck %s
; RUN: opt %loadPolly -polyhedral-info -polly-check-parallel -analyze < %s | FileCheck %s -check-prefix=PINFO
;
; CHECK-NOT: #pragma simd{{\s*$}}
; CHECK: #pragma simd reduction
; CHECK: Stmt_S0(n - c1)
; CHECK: #pragma simd{{\s*$}}
; CHECK: Stmt_S1(n - c1)
;
; PINFO: for.cond2: Loop is parallel.
; PINFO-NEXT: for.cond: Loop is not parallel.
;
; void rlr(int *A, long n) {
; for (long i = 0; i < 2 * n; i++)
; S0: A[0] += i;
; for (long i = 0; i < 2 * n; i++)
; S1: A[i + 1] = 1;
; }
;
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-n32-S64"
define void @rlr(i32* %A, i32 %n) {
entry:
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
%mul = shl nsw i32 %n, 1
%cmp = icmp slt i32 %i.0, %mul
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
br label %S0
S0: ; preds = %for.body
%tmp = load i32, i32* %A, align 4
%add = add nsw i32 %tmp, %i.0
store i32 %add, i32* %A, align 4
br label %for.inc
for.inc: ; preds = %S0
%inc = add nsw i32 %i.0, 1
br label %for.cond
for.end: ; preds = %for.cond
br label %for.cond2
for.cond2: ; preds = %for.inc8, %for.end
%i1.0 = phi i32 [ 0, %for.end ], [ %inc9, %for.inc8 ]
%mul3 = shl nsw i32 %n, 1
%cmp4 = icmp slt i32 %i1.0, %mul3
br i1 %cmp4, label %for.body5, label %for.end10
for.body5: ; preds = %for.cond2
br label %S1
S1: ; preds = %for.body5
%add6 = add nsw i32 %i1.0, 1
%arrayidx7 = getelementptr inbounds i32, i32* %A, i32 %add6
store i32 1, i32* %arrayidx7, align 4
br label %for.inc8
for.inc8: ; preds = %S1
%inc9 = add nsw i32 %i1.0, 1
br label %for.cond2
for.end10: ; preds = %for.cond2
ret void
}