llvm-project/polly/test/Isl/CodeGen/sequential_loops.ll

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; RUN: opt %loadPolly %defaultOpts -polly-ast -analyze < %s | FileCheck %s
;#include <string.h>
;#define N 1024
;
;int A[N];
;
;void sequential_loops() {
; int i;
; for (i = 0; i < N/2; i++) {
; A[i] = 1;
; }
; for (i = N/2 ; i < N; i++) {
; A[i] = 2;
; }
;}
;
;int main () {
; int i;
; memset(A, 0, sizeof(int) * N);
;
; sequential_loops();
;
; for (i = 0; i < N; i++) {
; if (A[i] != 1 && i < N/2)
; return 1;
; if (A[i] != 2 && i >= N/2)
; return 1;
; }
;
; return 0;
;}
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-pc-linux-gnu"
@A = common global [1024 x i32] zeroinitializer, align 4 ; <[1024 x i32]*> [#uses=5]
define void @sequential_loops() nounwind {
bb:
br label %bb1
bb1: ; preds = %bb3, %bb
%indvar1 = phi i64 [ %indvar.next2, %bb3 ], [ 0, %bb ]
%scevgep4 = getelementptr [1024 x i32]* @A, i64 0, i64 %indvar1
%exitcond3 = icmp ne i64 %indvar1, 512
br i1 %exitcond3, label %bb2, label %bb4
bb2: ; preds = %bb1
store i32 1, i32* %scevgep4
br label %bb3
bb3: ; preds = %bb2
%indvar.next2 = add i64 %indvar1, 1
br label %bb1
bb4: ; preds = %bb1
br label %bb5
bb5: ; preds = %bb7, %bb4
%indvar = phi i64 [ %indvar.next, %bb7 ], [ 0, %bb4 ]
%tmp = add i64 %indvar, 512
%scevgep = getelementptr [1024 x i32]* @A, i64 0, i64 %tmp
%exitcond = icmp ne i64 %indvar, 512
br i1 %exitcond, label %bb6, label %bb8
bb6: ; preds = %bb5
store i32 2, i32* %scevgep
br label %bb7
bb7: ; preds = %bb6
%indvar.next = add i64 %indvar, 1
br label %bb5
bb8: ; preds = %bb5
ret void
}
define i32 @main() nounwind {
bb:
call void @llvm.memset.p0i8.i64(i8* bitcast ([1024 x i32]* @A to i8*), i8 0, i64 4096, i32 1, i1 false)
call void @sequential_loops()
br label %bb1
bb1: ; preds = %bb15, %bb
%indvar = phi i64 [ %indvar.next, %bb15 ], [ 0, %bb ]
%i.0 = trunc i64 %indvar to i32
%scevgep = getelementptr [1024 x i32]* @A, i64 0, i64 %indvar
%tmp = icmp slt i32 %i.0, 1024
br i1 %tmp, label %bb2, label %bb16
bb2: ; preds = %bb1
%tmp3 = load i32* %scevgep
%tmp4 = icmp ne i32 %tmp3, 1
br i1 %tmp4, label %bb5, label %bb8
bb5: ; preds = %bb2
%tmp6 = icmp slt i32 %i.0, 512
br i1 %tmp6, label %bb7, label %bb8
bb7: ; preds = %bb5
br label %bb17
bb8: ; preds = %bb5, %bb2
%tmp9 = load i32* %scevgep
%tmp10 = icmp ne i32 %tmp9, 2
br i1 %tmp10, label %bb11, label %bb14
bb11: ; preds = %bb8
%tmp12 = icmp sge i32 %i.0, 512
br i1 %tmp12, label %bb13, label %bb14
bb13: ; preds = %bb11
br label %bb17
bb14: ; preds = %bb11, %bb8
br label %bb15
bb15: ; preds = %bb14
%indvar.next = add i64 %indvar, 1
br label %bb1
bb16: ; preds = %bb1
br label %bb17
bb17: ; preds = %bb16, %bb13, %bb7
%.0 = phi i32 [ 1, %bb7 ], [ 1, %bb13 ], [ 0, %bb16 ]
ret i32 %.0
}
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
; CHECK: {
; CHECK: for (int c1 = 0; c1 <= 511; c1 += 1)
; CHECK: Stmt_bb2(c1);
; CHECK: for (int c1 = 0; c1 <= 511; c1 += 1)
; CHECK: Stmt_bb6(c1);
; CHECK: }