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Changed how LLVM IR was generated to increase vectorization 

Summary: Changed the structure of the generated IR to make it easier to vectorize

Reviewers: morehouse, kcc

Reviewed By: morehouse

Subscribers: cfe-commits, llvm-commits

Differential Revision: https://reviews.llvm.org/D50342

llvm-svn: 339080
This commit is contained in:
Emmett Neyman 2018-08-06 23:11:38 +00:00
parent 4ece68a0a8
commit 673269edd7
1 changed files with 13 additions and 14 deletions
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27
clang/tools/clang-fuzzer/proto-to-llvm/loop_proto_to_llvm.cpp
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@ -53,7 +53,7 @@ std::string VarRefToString(std::ostream &os, const VarRef &x) {
break;
}
std::string ptr_var = get_var();
os << ptr_var << " = getelementptr i32, i32* " << arr << ", i64 %ct\n";
os << ptr_var << " = getelementptr inbounds i32, i32* " << arr << ", i64 %ct\n";
return ptr_var;
}
std::string RvalueToString(std::ostream &os, const Rvalue &x) {
@ -122,21 +122,20 @@ std::ostream &operator<<(std::ostream &os, const StatementSeq &x) {
return os;
}
std::ostream &operator<<(std::ostream &os, const LoopFunction &x) {
return os << "define void @foo(i32* %a, i32* %b, i32* noalias %c, i64 %s) {\n"
<< "%i = alloca i64\n"
<< "store i64 0, i64* %i\n"
<< "br label %loop\n\n"
return os << "target triple = \"x86_64-unknown-linux-gnu\"\n"
<< "define void @foo(i32* %a, i32* %b, i32* %c, i64 %s) {\n"
<< "%1 = icmp sgt i64 %s, 0\n"
<< "br i1 %1, label %start, label %end\n"
<< "start:\n"
<< "br label %loop\n"
<< "end:\n"
<< "ret void\n"
<< "loop:\n"
<< "%ct = load i64, i64* %i\n"
<< "%comp = icmp eq i64 %ct, %s\n"
<< "br i1 %comp, label %endloop, label %body\n\n"
<< "body:\n"
<< " %ct = phi i64 [ %ctnew, %loop ], [ 0, %start ]\n"
<< x.statements()
<< "%z = add i64 1, %ct\n"
<< "store i64 %z, i64* %i\n"
<< "br label %loop\n\n"
<< "endloop:\n"
<< "ret void\n}\n";
<< "%ctnew = add i64 %ct, 1\n"
<< "%j = icmp eq i64 %ctnew, %s\n"
<< "br i1 %j, label %end, label %loop\n}\n";
}
// ---------------------------------