97 lines
4.3 KiB
LLVM
97 lines
4.3 KiB
LLVM
; RUN: opt %loadPolly -basic-aa -polly-invariant-load-hoisting=true -polly-print-ast -disable-output < %s | FileCheck %s --allow-empty
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;#include <string.h>
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;#include <stdio.h>
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;#define N 1021
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;
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;int main () {
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; int i;
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; int A[N];
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; int RED[1];
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;
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; memset(A, 0, sizeof(int) * N);
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;
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; A[0] = 1;
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; A[1] = 1;
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; RED[0] = 0;
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;
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; for (i = 2; i < N; i++) {
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; A[i] = A[i-1] + A[i-2];
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; RED[0] += A[i-2];
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; }
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;
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; if (RED[0] != 382399368)
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; return 1;
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;}
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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"
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define i32 @main() nounwind {
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entry:
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%A = alloca [1021 x i32], align 4 ; <ptr> [#uses=6]
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%RED = alloca [1 x i32], align 4 ; <ptr> [#uses=3]
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%arraydecay = getelementptr inbounds [1021 x i32], ptr %A, i32 0, i32 0 ; <ptr> [#uses=1]
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call void @llvm.memset.p0.i64(ptr %arraydecay, i8 0, i64 4084, i32 1, i1 false)
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%arraydecay1 = getelementptr inbounds [1021 x i32], ptr %A, i32 0, i32 0 ; <ptr> [#uses=1]
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%arrayidx = getelementptr inbounds i32, ptr %arraydecay1, i64 0 ; <ptr> [#uses=1]
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store i32 1, ptr %arrayidx
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%arraydecay2 = getelementptr inbounds [1021 x i32], ptr %A, i32 0, i32 0 ; <ptr> [#uses=1]
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%arrayidx3 = getelementptr inbounds i32, ptr %arraydecay2, i64 1 ; <ptr> [#uses=1]
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store i32 1, ptr %arrayidx3
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%arraydecay4 = getelementptr inbounds [1 x i32], ptr %RED, i32 0, i32 0 ; <ptr> [#uses=1]
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%arrayidx5 = getelementptr inbounds i32, ptr %arraydecay4, i64 0 ; <ptr> [#uses=1]
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store i32 0, ptr %arrayidx5
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%indvar = phi i64 [ %indvar.next, %for.inc ], [ 0, %entry ] ; <i64> [#uses=5]
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%arrayidx15 = getelementptr [1021 x i32], ptr %A, i64 0, i64 %indvar ; <ptr> [#uses=2]
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%tmp = add i64 %indvar, 2 ; <i64> [#uses=1]
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%arrayidx20 = getelementptr [1021 x i32], ptr %A, i64 0, i64 %tmp ; <ptr> [#uses=1]
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%tmp1 = add i64 %indvar, 1 ; <i64> [#uses=1]
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%arrayidx9 = getelementptr [1021 x i32], ptr %A, i64 0, i64 %tmp1 ; <ptr> [#uses=1]
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%exitcond = icmp ne i64 %indvar, 1019 ; <i1> [#uses=1]
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br i1 %exitcond, label %for.body, label %for.end
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for.body: ; preds = %for.cond
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%tmp10 = load i32, ptr %arrayidx9 ; <i32> [#uses=1]
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%tmp16 = load i32, ptr %arrayidx15 ; <i32> [#uses=1]
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%add = add nsw i32 %tmp10, %tmp16 ; <i32> [#uses=1]
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store i32 %add, ptr %arrayidx20
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%tmp26 = load i32, ptr %arrayidx15 ; <i32> [#uses=1]
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%arraydecay27 = getelementptr inbounds [1 x i32], ptr %RED, i32 0, i32 0 ; <ptr> [#uses=1]
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%arrayidx28 = getelementptr inbounds i32, ptr %arraydecay27, i64 0 ; <ptr> [#uses=2]
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%tmp29 = load i32, ptr %arrayidx28 ; <i32> [#uses=1]
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%add30 = add nsw i32 %tmp29, %tmp26 ; <i32> [#uses=1]
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store i32 %add30, ptr %arrayidx28
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br label %for.inc
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for.inc: ; preds = %for.body
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%indvar.next = add i64 %indvar, 1 ; <i64> [#uses=1]
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br label %for.cond
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for.end: ; preds = %for.cond
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%arraydecay32 = getelementptr inbounds [1 x i32], ptr %RED, i32 0, i32 0 ; <ptr> [#uses=1]
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%arrayidx33 = getelementptr inbounds i32, ptr %arraydecay32, i64 0 ; <ptr> [#uses=1]
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%tmp34 = load i32, ptr %arrayidx33 ; <i32> [#uses=1]
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%cmp35 = icmp ne i32 %tmp34, 382399368 ; <i1> [#uses=1]
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br i1 %cmp35, label %if.then, label %if.end
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if.then: ; preds = %for.end
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br label %if.end
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if.end: ; preds = %if.then, %for.end
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%retval.0 = phi i32 [ 1, %if.then ], [ 0, %for.end ] ; <i32> [#uses=1]
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ret i32 %retval.0
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}
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declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i32, i1) nounwind
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; This is a negative test. We can prove that RED[0] in the conditional after
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; the loop is dereferencable and consequently expand the SCoP from the
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; loop to include the conditional. However, during SCoP generation we realize
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; that, while RED[0] is invariant, it is written to as part of the same scop
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; and can consequently not be hoisted. Hence, we invalidate the scop.
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;
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; CHECK-NOT: for (int c0 = 0; c0 <= 1018; c0 += 1)
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