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1; RUN: opt %loadNPMPolly -polly-invariant-load-hoisting -polly-detect-full-functions '-passes=polly-custom<scops>' -polly-print-scops -disable-output < %s | FileCheck %s2;3; This testcase checks for compatibility of the -detect-full-functions4; flag in combination with the -invariant-load-hoisting option. More5; specifically, ScopHelper.cpp::isHoistableLoad only gets called if6; -invariant-load-hoisting is enabled. This function, however, had a bug7; which caused a crash if the region argument was top-level. This test8; is a minimal example that hits this specific code path.9;10; Also note that this file's IR is in no way optimized, i.e. it was11; generated with clang -O0 from the following C-code:12;13; void test() {14; int A[] = {1, 2, 3, 4, 5};15; int len = (sizeof A) / sizeof(int);16; for (int i = 0; i < len; ++i) {17; A[i] = A[i] * 2;18; }19; }20;21; This is also the reason why polly does not detect any scops (the loop22; variable i is loaded from and stored to memory in each iteration):23;24; CHECK: region: 'for.cond => for.end' in function 'test':25; CHECK-NEXT: Invalid Scop!26; CHECK-NEXT: region: 'entry => <Function Return>' in function 'test':27; CHECK-NEXT: Invalid Scop!28;29target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"30 31@test.A = private unnamed_addr constant [5 x i32] [i32 1, i32 2, i32 3, i32 4, i32 5], align 1632 33define void @test() {34entry:35 %A = alloca [5 x i32], align 1636 %len = alloca i32, align 437 %i = alloca i32, align 438 call void @llvm.memcpy.p0.p0.i64(ptr %A, ptr @test.A, i64 20, i32 16, i1 false)39 store i32 5, ptr %len, align 440 store i32 0, ptr %i, align 441 br label %for.cond42 43for.cond: ; preds = %for.inc, %entry44 %0 = load i32, ptr %i, align 445 %1 = load i32, ptr %len, align 446 %cmp = icmp slt i32 %0, %147 br i1 %cmp, label %for.body, label %for.end48 49for.body: ; preds = %for.cond50 %2 = load i32, ptr %i, align 451 %idxprom = sext i32 %2 to i6452 %arrayidx = getelementptr inbounds [5 x i32], ptr %A, i64 0, i64 %idxprom53 %3 = load i32, ptr %arrayidx, align 454 %mul = mul nsw i32 %3, 255 %4 = load i32, ptr %i, align 456 %idxprom1 = sext i32 %4 to i6457 %arrayidx2 = getelementptr inbounds [5 x i32], ptr %A, i64 0, i64 %idxprom158 store i32 %mul, ptr %arrayidx2, align 459 br label %for.inc60 61for.inc: ; preds = %for.body62 %5 = load i32, ptr %i, align 463 %inc = add nsw i32 %5, 164 store i32 %inc, ptr %i, align 465 br label %for.cond66 67for.end: ; preds = %for.cond68 ret void69}70 71declare void @llvm.memcpy.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i32, i1)72