rc1/test/Cloog/CodeGen/simple_vec_stride_one.ll

; RUN: opt %loadPolly %defaultOpts -polly-codegen %vector-opt -dce -S < %s | FileCheck %s
; RUN: opt %loadPolly -basicaa -polly-codegen -polly-vectorizer=unroll-only -S < %s | FileCheck -check-prefix=UNROLL %s
; RUN: opt %loadPolly %defaultOpts -polly-import-jscop -polly-import-jscop-dir=%S -polly-cloog -analyze   < %s | FileCheck -check-prefix=IMPORT %s
; RUN: opt %loadPolly %defaultOpts -polly-import-jscop -polly-import-jscop-dir=%S -polly-codegen  < %s -S  %vector-opt | FileCheck -check-prefix=CODEGEN %s

;#define N 1024
;float A[N];
;float B[N];
;
;void simple_vec_stride_one(void) {
;  int i;
;
;  for (i = 0; i < 4; i++)
;    B[i] = A[i];
;}
;int main()
;{
;  simple_vec_stride_one();
;  return A[42];
;}

target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
target triple = "x86_64-unknown-linux-gnu"

@A = common global [1024 x float] zeroinitializer, align 16
@B = common global [1024 x float] zeroinitializer, align 16

define void @simple_vec_stride_one() nounwind {
; <label>:0
  br label %1

; <label>:1                                       ; preds = %4, %0
  %indvar = phi i64 [ %indvar.next, %4 ], [ 0, %0 ]
  %scevgep = getelementptr [1024 x float]* @B, i64 0, i64 %indvar
  %scevgep1 = getelementptr [1024 x float]* @A, i64 0, i64 %indvar
  %exitcond = icmp ne i64 %indvar, 4
  br i1 %exitcond, label %2, label %5

; <label>:2                                       ; preds = %1
  %3 = load float* %scevgep1, align 4
  store float %3, float* %scevgep, align 4
  br label %4

; <label>:4                                       ; preds = %2
  %indvar.next = add i64 %indvar, 1
  br label %1

; <label>:5                                       ; preds = %1
  ret void
}

define i32 @main() nounwind {
  call void @simple_vec_stride_one()
  %1 = load float* getelementptr inbounds ([1024 x float]* @A, i64 0, i64 42), align 8
  %2 = fptosi float %1 to i32
  ret i32 %2
}

; CHECK: [[LOAD1:%[a-zA-Z0-9_]+]] = load <4 x float>*
; CHECK: store <4 x float> [[LOAD1]]

; IMPORT: for (c2=0;c2<=12;c2+=4) {
; IMPORT:     Stmt_2({{[(]?}}c2/4{{[)]?}});
; IMPORT: }

; We do not generate optimal loads for this.
; CODEGEN: <4 x float>

; UNROLL: [[LOAD1:%[a-zA-Z0-9_]+_scalar.*]] = load float*
; UNROLL: [[LOAD2:%[a-zA-Z0-9_]+_scalar.*]] = load float*
; UNROLL: [[LOAD3:%[a-zA-Z0-9_]+_scalar.*]] = load float*
; UNROLL: [[LOAD4:%[a-zA-Z0-9_]+_scalar.*]] = load float*
; UNROLL: store float [[LOAD1]]
; UNROLL: store float [[LOAD2]]
; UNROLL: store float [[LOAD3]]
; UNROLL: store float [[LOAD4]]