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