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| ; RUN: opt %loadPolly -basicaa -polly-ast -analyze \
; RUN: -polly-invariant-load-hoisting=true < %s | FileCheck %s
;#include <string.h>
;#include <stdio.h>
;#define N 1021
;
;int main () {
; int i;
; int A[N];
; int RED[1];
;
; memset(A, 0, sizeof(int) * N);
;
; A[0] = 1;
; A[1] = 1;
; RED[0] = 0;
;
; for (i = 2; i < N; i++) {
; A[i] = A[i-1] + A[i-2];
; RED[0] += A[i-2];
; }
;
; if (RED[0] != 382399368)
; return 1;
;}
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"
define i32 @main() nounwind {
entry:
%A = alloca [1021 x i32], align 4 ; <[1021 x i32]*> [#uses=6]
%RED = alloca [1 x i32], align 4 ; <[1 x i32]*> [#uses=3]
%arraydecay = getelementptr inbounds [1021 x i32], [1021 x i32]* %A, i32 0, i32 0 ; <i32*> [#uses=1]
%conv = bitcast i32* %arraydecay to i8* ; <i8*> [#uses=1]
call void @llvm.memset.p0i8.i64(i8* %conv, i8 0, i64 4084, i32 1, i1 false)
%arraydecay1 = getelementptr inbounds [1021 x i32], [1021 x i32]* %A, i32 0, i32 0 ; <i32*> [#uses=1]
%arrayidx = getelementptr inbounds i32, i32* %arraydecay1, i64 0 ; <i32*> [#uses=1]
store i32 1, i32* %arrayidx
%arraydecay2 = getelementptr inbounds [1021 x i32], [1021 x i32]* %A, i32 0, i32 0 ; <i32*> [#uses=1]
%arrayidx3 = getelementptr inbounds i32, i32* %arraydecay2, i64 1 ; <i32*> [#uses=1]
store i32 1, i32* %arrayidx3
%arraydecay4 = getelementptr inbounds [1 x i32], [1 x i32]* %RED, i32 0, i32 0 ; <i32*> [#uses=1]
%arrayidx5 = getelementptr inbounds i32, i32* %arraydecay4, i64 0 ; <i32*> [#uses=1]
store i32 0, i32* %arrayidx5
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%indvar = phi i64 [ %indvar.next, %for.inc ], [ 0, %entry ] ; <i64> [#uses=5]
%arrayidx15 = getelementptr [1021 x i32], [1021 x i32]* %A, i64 0, i64 %indvar ; <i32*> [#uses=2]
%tmp = add i64 %indvar, 2 ; <i64> [#uses=1]
%arrayidx20 = getelementptr [1021 x i32], [1021 x i32]* %A, i64 0, i64 %tmp ; <i32*> [#uses=1]
%tmp1 = add i64 %indvar, 1 ; <i64> [#uses=1]
%arrayidx9 = getelementptr [1021 x i32], [1021 x i32]* %A, i64 0, i64 %tmp1 ; <i32*> [#uses=1]
%exitcond = icmp ne i64 %indvar, 1019 ; <i1> [#uses=1]
br i1 %exitcond, label %for.body, label %for.end
for.body: ; preds = %for.cond
%tmp10 = load i32, i32* %arrayidx9 ; <i32> [#uses=1]
%tmp16 = load i32, i32* %arrayidx15 ; <i32> [#uses=1]
%add = add nsw i32 %tmp10, %tmp16 ; <i32> [#uses=1]
store i32 %add, i32* %arrayidx20
%tmp26 = load i32, i32* %arrayidx15 ; <i32> [#uses=1]
%arraydecay27 = getelementptr inbounds [1 x i32], [1 x i32]* %RED, i32 0, i32 0 ; <i32*> [#uses=1]
%arrayidx28 = getelementptr inbounds i32, i32* %arraydecay27, i64 0 ; <i32*> [#uses=2]
%tmp29 = load i32, i32* %arrayidx28 ; <i32> [#uses=1]
%add30 = add nsw i32 %tmp29, %tmp26 ; <i32> [#uses=1]
store i32 %add30, i32* %arrayidx28
br label %for.inc
for.inc: ; preds = %for.body
%indvar.next = add i64 %indvar, 1 ; <i64> [#uses=1]
br label %for.cond
for.end: ; preds = %for.cond
%arraydecay32 = getelementptr inbounds [1 x i32], [1 x i32]* %RED, i32 0, i32 0 ; <i32*> [#uses=1]
%arrayidx33 = getelementptr inbounds i32, i32* %arraydecay32, i64 0 ; <i32*> [#uses=1]
%tmp34 = load i32, i32* %arrayidx33 ; <i32> [#uses=1]
%cmp35 = icmp ne i32 %tmp34, 382399368 ; <i1> [#uses=1]
br i1 %cmp35, label %if.then, label %if.end
if.then: ; preds = %for.end
br label %if.end
if.end: ; preds = %if.then, %for.end
%retval.0 = phi i32 [ 1, %if.then ], [ 0, %for.end ] ; <i32> [#uses=1]
ret i32 %retval.0
}
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
; This is a negative test. We can prove that RED[0] in the conditional after
; the loop is dereferencable and consequently expand the SCoP from the
; loop to include the conditional. However, during SCoP generation we realize
; that, while RED[0] is invariant, it is written to as part of the same scop
; and can consequently not be hoisted. Hence, we invalidate the scop.
;
; CHECK-NOT: for (int c0 = 0; c0 <= 1018; c0 += 1)
|