forked from OSchip/llvm-project
78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
//===- UnrollLoopTest.cpp - Unit tests for UnrollLoop ---------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Transforms/Utils/UnrollLoop.h"
|
|
#include "llvm/Analysis/AssumptionCache.h"
|
|
#include "llvm/Analysis/LoopInfo.h"
|
|
#include "llvm/Analysis/ScalarEvolution.h"
|
|
#include "llvm/Analysis/TargetLibraryInfo.h"
|
|
#include "llvm/AsmParser/Parser.h"
|
|
#include "llvm/IR/BasicBlock.h"
|
|
#include "llvm/IR/Dominators.h"
|
|
#include "llvm/IR/LLVMContext.h"
|
|
#include "llvm/Support/SourceMgr.h"
|
|
#include "gtest/gtest.h"
|
|
|
|
using namespace llvm;
|
|
|
|
static std::unique_ptr<Module> parseIR(LLVMContext &C, const char *IR) {
|
|
SMDiagnostic Err;
|
|
std::unique_ptr<Module> Mod = parseAssemblyString(IR, Err, C);
|
|
if (!Mod)
|
|
Err.print("UnrollLoopTests", errs());
|
|
return Mod;
|
|
}
|
|
|
|
TEST(LoopUnrollRuntime, Latch) {
|
|
LLVMContext C;
|
|
|
|
std::unique_ptr<Module> M = parseIR(
|
|
C,
|
|
R"(define i32 @test(i32* %a, i32* %b, i32* %c, i64 %n) {
|
|
entry:
|
|
br label %while.cond
|
|
|
|
while.cond: ; preds = %while.body, %entry
|
|
%i.0 = phi i64 [ 0, %entry ], [ %inc, %while.body ]
|
|
%cmp = icmp slt i64 %i.0, %n
|
|
br i1 %cmp, label %while.body, label %while.end
|
|
|
|
while.body: ; preds = %while.cond
|
|
%arrayidx = getelementptr inbounds i32, i32* %b, i64 %i.0
|
|
%0 = load i32, i32* %arrayidx
|
|
%arrayidx1 = getelementptr inbounds i32, i32* %c, i64 %i.0
|
|
%1 = load i32, i32* %arrayidx1
|
|
%mul = mul nsw i32 %0, %1
|
|
%arrayidx2 = getelementptr inbounds i32, i32* %a, i64 %i.0
|
|
store i32 %mul, i32* %arrayidx2
|
|
%inc = add nsw i64 %i.0, 1
|
|
br label %while.cond
|
|
|
|
while.end: ; preds = %while.cond
|
|
ret i32 0
|
|
})"
|
|
);
|
|
|
|
auto *F = M->getFunction("test");
|
|
DominatorTree DT(*F);
|
|
LoopInfo LI(DT);
|
|
AssumptionCache AC(*F);
|
|
TargetLibraryInfoImpl TLII;
|
|
TargetLibraryInfo TLI(TLII);
|
|
ScalarEvolution SE(*F, TLI, AC, DT, LI);
|
|
|
|
Loop *L = *LI.begin();
|
|
|
|
bool PreserveLCSSA = L->isRecursivelyLCSSAForm(DT,LI);
|
|
|
|
bool ret =
|
|
UnrollRuntimeLoopRemainder(L, 4, true, false, false, false, &LI, &SE, &DT,
|
|
&AC, /*TTI=*/nullptr, PreserveLCSSA);
|
|
EXPECT_FALSE(ret);
|
|
}
|