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| ; RUN: opt %loadPolly -analyze -polly-scops -polly-invariant-load-hoisting \
; RUN: -polly-detect-full-functions < %s | FileCheck %s
;
; This testcase checks for compatibility of the -detect-full-functions
; flag in combination with the -invariant-load-hoisting option. More
; specifically, ScopHelper.cpp::isHoistableLoad only gets called if
; -invariant-load-hoisting is enabled. This function, however, had a bug
; which caused a crash if the region argument was top-level. This test
; is a minimal example that hits this specific code path.
;
; Also note that this file's IR is in no way optimized, i.e. it was
; generated with clang -O0 from the following C-code:
;
; void test() {
; int A[] = {1, 2, 3, 4, 5};
; int len = (sizeof A) / sizeof(int);
; for (int i = 0; i < len; ++i) {
; A[i] = A[i] * 2;
; }
; }
;
; This is also the reason why polly does not detect any scops (the loop
; variable i is loaded from and stored to memory in each iteration):
;
; CHECK: region: 'for.cond => for.end' in function 'test':
; CHECK-NEXT: Invalid Scop!
; CHECK-NEXT: region: 'entry => <Function Return>' in function 'test':
; CHECK-NEXT: Invalid Scop!
;
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
@test.A = private unnamed_addr constant [5 x i32] [i32 1, i32 2, i32 3, i32 4, i32 5], align 16
define void @test() {
entry:
%A = alloca [5 x i32], align 16
%len = alloca i32, align 4
%i = alloca i32, align 4
%0 = bitcast [5 x i32]* %A to i8*
call void @llvm.memcpy.p0i8.p0i8.i64(i8* %0, i8* bitcast ([5 x i32]* @test.A to i8*), i64 20, i32 16, i1 false)
store i32 5, i32* %len, align 4
store i32 0, i32* %i, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%1 = load i32, i32* %i, align 4
%2 = load i32, i32* %len, align 4
%cmp = icmp slt i32 %1, %2
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%3 = load i32, i32* %i, align 4
%idxprom = sext i32 %3 to i64
%arrayidx = getelementptr inbounds [5 x i32], [5 x i32]* %A, i64 0, i64 %idxprom
%4 = load i32, i32* %arrayidx, align 4
%mul = mul nsw i32 %4, 2
%5 = load i32, i32* %i, align 4
%idxprom1 = sext i32 %5 to i64
%arrayidx2 = getelementptr inbounds [5 x i32], [5 x i32]* %A, i64 0, i64 %idxprom1
store i32 %mul, i32* %arrayidx2, align 4
br label %for.inc
for.inc: ; preds = %for.body
%6 = load i32, i32* %i, align 4
%inc = add nsw i32 %6, 1
store i32 %inc, i32* %i, align 4
br label %for.cond
for.end: ; preds = %for.cond
ret void
}
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i32, i1)
|