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llvm-6502/unittests/IR/ConstantsTest.cpp
David Blaikie 198d8baafb [opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction 
One of several parallel first steps to remove the target type of pointers,
replacing them with a single opaque pointer type.

This adds an explicit type parameter to the gep instruction so that when the
first parameter becomes an opaque pointer type, the type to gep through is
still available to the instructions.

* This doesn't modify gep operators, only instructions (operators will be
  handled separately)

* Textual IR changes only. Bitcode (including upgrade) and changing the
  in-memory representation will be in separate changes.

* geps of vectors are transformed as:
    getelementptr <4 x float*> %x, ...
  ->getelementptr float, <4 x float*> %x, ...
  Then, once the opaque pointer type is introduced, this will ultimately look
  like:
    getelementptr float, <4 x ptr> %x
  with the unambiguous interpretation that it is a vector of pointers to float.

* address spaces remain on the pointer, not the type:
    getelementptr float addrspace(1)* %x
  ->getelementptr float, float addrspace(1)* %x
  Then, eventually:
    getelementptr float, ptr addrspace(1) %x

Importantly, the massive amount of test case churn has been automated by
same crappy python code. I had to manually update a few test cases that
wouldn't fit the script's model (r228970,r229196,r229197,r229198). The
python script just massages stdin and writes the result to stdout, I
then wrapped that in a shell script to handle replacing files, then
using the usual find+xargs to migrate all the files.

update.py:
import fileinput
import sys
import re

ibrep = re.compile(r"(^.*?[^%\w]getelementptr inbounds )(((?:<\d* x )?)(.*?)(| addrspace\(\d\)) *\*(|>)(?:$| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$))")
normrep = re.compile(       r"(^.*?[^%\w]getelementptr )(((?:<\d* x )?)(.*?)(| addrspace\(\d\)) *\*(|>)(?:$| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$))")

def conv(match, line):
  if not match:
    return line
  line = match.groups()[0]
  if len(match.groups()[5]) == 0:
    line += match.groups()[2]
  line += match.groups()[3]
  line += ", "
  line += match.groups()[1]
  line += "\n"
  return line

for line in sys.stdin:
  if line.find("getelementptr ") == line.find("getelementptr inbounds"):
    if line.find("getelementptr inbounds") != line.find("getelementptr inbounds ("):
      line = conv(re.match(ibrep, line), line)
  elif line.find("getelementptr ") != line.find("getelementptr ("):
    line = conv(re.match(normrep, line), line)
  sys.stdout.write(line)

apply.sh:
for name in "$@"
do
  python3 `dirname "$0"`/update.py < "$name" > "$name.tmp" && mv "$name.tmp" "$name"
  rm -f "$name.tmp"
done

The actual commands:
From llvm/src:
find test/ -name *.ll | xargs ./apply.sh
From llvm/src/tools/clang:
find test/ -name *.mm -o -name *.m -o -name *.cpp -o -name *.c | xargs -I '{}' ../../apply.sh "{}"
From llvm/src/tools/polly:
find test/ -name *.ll | xargs ./apply.sh

After that, check-all (with llvm, clang, clang-tools-extra, lld,
compiler-rt, and polly all checked out).

The extra 'rm' in the apply.sh script is due to a few files in clang's test
suite using interesting unicode stuff that my python script was throwing
exceptions on. None of those files needed to be migrated, so it seemed
sufficient to ignore those cases.

Reviewers: rafael, dexonsmith, grosser

Differential Revision: http://reviews.llvm.org/D7636

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230786 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-27 19:29:02 +00:00

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//===- llvm/unittest/IR/ConstantsTest.cpp - Constants unit tests ----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/InstrTypes.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/SourceMgr.h"
#include "gtest/gtest.h"
namespace llvm {
namespace {
TEST(ConstantsTest, Integer_i1) {
IntegerType* Int1 = IntegerType::get(getGlobalContext(), 1);
Constant* One = ConstantInt::get(Int1, 1, true);
Constant* Zero = ConstantInt::get(Int1, 0);
Constant* NegOne = ConstantInt::get(Int1, static_cast<uint64_t>(-1), true);
EXPECT_EQ(NegOne, ConstantInt::getSigned(Int1, -1));
Constant* Undef = UndefValue::get(Int1);
// Input: @b = constant i1 add(i1 1 , i1 1)
// Output: @b = constant i1 false
EXPECT_EQ(Zero, ConstantExpr::getAdd(One, One));
// @c = constant i1 add(i1 -1, i1 1)
// @c = constant i1 false
EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, One));
// @d = constant i1 add(i1 -1, i1 -1)
// @d = constant i1 false
EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, NegOne));
// @e = constant i1 sub(i1 -1, i1 1)
// @e = constant i1 false
EXPECT_EQ(Zero, ConstantExpr::getSub(NegOne, One));
// @f = constant i1 sub(i1 1 , i1 -1)
// @f = constant i1 false
EXPECT_EQ(Zero, ConstantExpr::getSub(One, NegOne));
// @g = constant i1 sub(i1 1 , i1 1)
// @g = constant i1 false
EXPECT_EQ(Zero, ConstantExpr::getSub(One, One));
// @h = constant i1 shl(i1 1 , i1 1) ; undefined
// @h = constant i1 undef
EXPECT_EQ(Undef, ConstantExpr::getShl(One, One));
// @i = constant i1 shl(i1 1 , i1 0)
// @i = constant i1 true
EXPECT_EQ(One, ConstantExpr::getShl(One, Zero));
// @j = constant i1 lshr(i1 1, i1 1) ; undefined
// @j = constant i1 undef
EXPECT_EQ(Undef, ConstantExpr::getLShr(One, One));
// @m = constant i1 ashr(i1 1, i1 1) ; undefined
// @m = constant i1 undef
EXPECT_EQ(Undef, ConstantExpr::getAShr(One, One));
// @n = constant i1 mul(i1 -1, i1 1)
// @n = constant i1 true
EXPECT_EQ(One, ConstantExpr::getMul(NegOne, One));
// @o = constant i1 sdiv(i1 -1, i1 1) ; overflow
// @o = constant i1 true
EXPECT_EQ(One, ConstantExpr::getSDiv(NegOne, One));
// @p = constant i1 sdiv(i1 1 , i1 -1); overflow
// @p = constant i1 true
EXPECT_EQ(One, ConstantExpr::getSDiv(One, NegOne));
// @q = constant i1 udiv(i1 -1, i1 1)
// @q = constant i1 true
EXPECT_EQ(One, ConstantExpr::getUDiv(NegOne, One));
// @r = constant i1 udiv(i1 1, i1 -1)
// @r = constant i1 true
EXPECT_EQ(One, ConstantExpr::getUDiv(One, NegOne));
// @s = constant i1 srem(i1 -1, i1 1) ; overflow
// @s = constant i1 false
EXPECT_EQ(Zero, ConstantExpr::getSRem(NegOne, One));
// @t = constant i1 urem(i1 -1, i1 1)
// @t = constant i1 false
EXPECT_EQ(Zero, ConstantExpr::getURem(NegOne, One));
// @u = constant i1 srem(i1 1, i1 -1) ; overflow
// @u = constant i1 false
EXPECT_EQ(Zero, ConstantExpr::getSRem(One, NegOne));
}
TEST(ConstantsTest, IntSigns) {
IntegerType* Int8Ty = Type::getInt8Ty(getGlobalContext());
EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, false)->getSExtValue());
EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, true)->getSExtValue());
EXPECT_EQ(100, ConstantInt::getSigned(Int8Ty, 100)->getSExtValue());
EXPECT_EQ(-50, ConstantInt::get(Int8Ty, 206)->getSExtValue());
EXPECT_EQ(-50, ConstantInt::getSigned(Int8Ty, -50)->getSExtValue());
EXPECT_EQ(206U, ConstantInt::getSigned(Int8Ty, -50)->getZExtValue());
// Overflow is handled by truncation.
EXPECT_EQ(0x3b, ConstantInt::get(Int8Ty, 0x13b)->getSExtValue());
}
TEST(ConstantsTest, FP128Test) {
Type *FP128Ty = Type::getFP128Ty(getGlobalContext());
IntegerType *Int128Ty = Type::getIntNTy(getGlobalContext(), 128);
Constant *Zero128 = Constant::getNullValue(Int128Ty);
Constant *X = ConstantExpr::getUIToFP(Zero128, FP128Ty);
EXPECT_TRUE(isa<ConstantFP>(X));
}
TEST(ConstantsTest, PointerCast) {
LLVMContext &C(getGlobalContext());
Type *Int8PtrTy = Type::getInt8PtrTy(C);
Type *Int32PtrTy = Type::getInt32PtrTy(C);
Type *Int64Ty = Type::getInt64Ty(C);
VectorType *Int8PtrVecTy = VectorType::get(Int8PtrTy, 4);
VectorType *Int32PtrVecTy = VectorType::get(Int32PtrTy, 4);
VectorType *Int64VecTy = VectorType::get(Int64Ty, 4);
// ptrtoint i8* to i64
EXPECT_EQ(Constant::getNullValue(Int64Ty),
ConstantExpr::getPointerCast(
Constant::getNullValue(Int8PtrTy), Int64Ty));
// bitcast i8* to i32*
EXPECT_EQ(Constant::getNullValue(Int32PtrTy),
ConstantExpr::getPointerCast(
Constant::getNullValue(Int8PtrTy), Int32PtrTy));
// ptrtoint <4 x i8*> to <4 x i64>
EXPECT_EQ(Constant::getNullValue(Int64VecTy),
ConstantExpr::getPointerCast(
Constant::getNullValue(Int8PtrVecTy), Int64VecTy));
// bitcast <4 x i8*> to <4 x i32*>
EXPECT_EQ(Constant::getNullValue(Int32PtrVecTy),
ConstantExpr::getPointerCast(
Constant::getNullValue(Int8PtrVecTy), Int32PtrVecTy));
}
#define CHECK(x, y) { \
std::string __s; \
raw_string_ostream __o(__s); \
Instruction *__I = cast<ConstantExpr>(x)->getAsInstruction(); \
__I->print(__o); \
delete __I; \
__o.flush(); \
EXPECT_EQ(std::string(" <badref> = " y), __s); \
}
TEST(ConstantsTest, AsInstructionsTest) {
std::unique_ptr<Module> M(new Module("MyModule", getGlobalContext()));
Type *Int64Ty = Type::getInt64Ty(getGlobalContext());
Type *Int32Ty = Type::getInt32Ty(getGlobalContext());
Type *Int16Ty = Type::getInt16Ty(getGlobalContext());
Type *Int1Ty = Type::getInt1Ty(getGlobalContext());
Type *FloatTy = Type::getFloatTy(getGlobalContext());
Type *DoubleTy = Type::getDoubleTy(getGlobalContext());
Constant *Global = M->getOrInsertGlobal("dummy",
PointerType::getUnqual(Int32Ty));
Constant *Global2 = M->getOrInsertGlobal("dummy2",
PointerType::getUnqual(Int32Ty));
Constant *P0 = ConstantExpr::getPtrToInt(Global, Int32Ty);
Constant *P1 = ConstantExpr::getUIToFP(P0, FloatTy);
Constant *P2 = ConstantExpr::getUIToFP(P0, DoubleTy);
Constant *P3 = ConstantExpr::getTrunc(P0, Int1Ty);
Constant *P4 = ConstantExpr::getPtrToInt(Global2, Int32Ty);
Constant *P5 = ConstantExpr::getUIToFP(P4, FloatTy);
Constant *P6 = ConstantExpr::getBitCast(P4, VectorType::get(Int16Ty, 2));
Constant *One = ConstantInt::get(Int32Ty, 1);
#define P0STR "ptrtoint (i32** @dummy to i32)"
#define P1STR "uitofp (i32 ptrtoint (i32** @dummy to i32) to float)"
#define P2STR "uitofp (i32 ptrtoint (i32** @dummy to i32) to double)"
#define P3STR "ptrtoint (i32** @dummy to i1)"
#define P4STR "ptrtoint (i32** @dummy2 to i32)"
#define P5STR "uitofp (i32 ptrtoint (i32** @dummy2 to i32) to float)"
#define P6STR "bitcast (i32 ptrtoint (i32** @dummy2 to i32) to <2 x i16>)"
CHECK(ConstantExpr::getNeg(P0), "sub i32 0, " P0STR);
CHECK(ConstantExpr::getFNeg(P1), "fsub float -0.000000e+00, " P1STR);
CHECK(ConstantExpr::getNot(P0), "xor i32 " P0STR ", -1");
CHECK(ConstantExpr::getAdd(P0, P0), "add i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getAdd(P0, P0, false, true), "add nsw i32 " P0STR ", "
P0STR);
CHECK(ConstantExpr::getAdd(P0, P0, true, true), "add nuw nsw i32 " P0STR ", "
P0STR);
CHECK(ConstantExpr::getFAdd(P1, P1), "fadd float " P1STR ", " P1STR);
CHECK(ConstantExpr::getSub(P0, P0), "sub i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getFSub(P1, P1), "fsub float " P1STR ", " P1STR);
CHECK(ConstantExpr::getMul(P0, P0), "mul i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getFMul(P1, P1), "fmul float " P1STR ", " P1STR);
CHECK(ConstantExpr::getUDiv(P0, P0), "udiv i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getSDiv(P0, P0), "sdiv i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getFDiv(P1, P1), "fdiv float " P1STR ", " P1STR);
CHECK(ConstantExpr::getURem(P0, P0), "urem i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getSRem(P0, P0), "srem i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getFRem(P1, P1), "frem float " P1STR ", " P1STR);
CHECK(ConstantExpr::getAnd(P0, P0), "and i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getOr(P0, P0), "or i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getXor(P0, P0), "xor i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getShl(P0, P0), "shl i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getShl(P0, P0, true), "shl nuw i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getShl(P0, P0, false, true), "shl nsw i32 " P0STR ", "
P0STR);
CHECK(ConstantExpr::getLShr(P0, P0, false), "lshr i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getLShr(P0, P0, true), "lshr exact i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getAShr(P0, P0, false), "ashr i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getAShr(P0, P0, true), "ashr exact i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getSExt(P0, Int64Ty), "sext i32 " P0STR " to i64");
CHECK(ConstantExpr::getZExt(P0, Int64Ty), "zext i32 " P0STR " to i64");
CHECK(ConstantExpr::getFPTrunc(P2, FloatTy), "fptrunc double " P2STR
" to float");
CHECK(ConstantExpr::getFPExtend(P1, DoubleTy), "fpext float " P1STR
" to double");
CHECK(ConstantExpr::getExactUDiv(P0, P0), "udiv exact i32 " P0STR ", " P0STR);
CHECK(ConstantExpr::getSelect(P3, P0, P4), "select i1 " P3STR ", i32 " P0STR
", i32 " P4STR);
CHECK(ConstantExpr::getICmp(CmpInst::ICMP_EQ, P0, P4), "icmp eq i32 " P0STR
", " P4STR);
CHECK(ConstantExpr::getFCmp(CmpInst::FCMP_ULT, P1, P5), "fcmp ult float "
P1STR ", " P5STR);
std::vector<Constant*> V;
V.push_back(One);
// FIXME: getGetElementPtr() actually creates an inbounds ConstantGEP,
// not a normal one!
//CHECK(ConstantExpr::getGetElementPtr(Global, V, false),
// "getelementptr i32*, i32** @dummy, i32 1");
CHECK(ConstantExpr::getInBoundsGetElementPtr(Global, V),
"getelementptr inbounds i32*, i32** @dummy, i32 1");
CHECK(ConstantExpr::getExtractElement(P6, One), "extractelement <2 x i16> "
P6STR ", i32 1");
}
#ifdef GTEST_HAS_DEATH_TEST
#ifndef NDEBUG
TEST(ConstantsTest, ReplaceWithConstantTest) {
std::unique_ptr<Module> M(new Module("MyModule", getGlobalContext()));
Type *Int32Ty = Type::getInt32Ty(getGlobalContext());
Constant *One = ConstantInt::get(Int32Ty, 1);
Constant *Global =
M->getOrInsertGlobal("dummy", PointerType::getUnqual(Int32Ty));
Constant *GEP = ConstantExpr::getGetElementPtr(Global, One);
EXPECT_DEATH(Global->replaceAllUsesWith(GEP),
"this->replaceAllUsesWith\\(expr\\(this\\)\\) is NOT valid!");
}
#endif
#endif
#undef CHECK
TEST(ConstantsTest, ConstantArrayReplaceWithConstant) {
LLVMContext Context;
std::unique_ptr<Module> M(new Module("MyModule", Context));
Type *IntTy = Type::getInt8Ty(Context);
ArrayType *ArrayTy = ArrayType::get(IntTy, 2);
Constant *A01Vals[2] = {ConstantInt::get(IntTy, 0),
ConstantInt::get(IntTy, 1)};
Constant *A01 = ConstantArray::get(ArrayTy, A01Vals);
Constant *Global = new GlobalVariable(*M, IntTy, false,
GlobalValue::ExternalLinkage, nullptr);
Constant *GlobalInt = ConstantExpr::getPtrToInt(Global, IntTy);
Constant *A0GVals[2] = {ConstantInt::get(IntTy, 0), GlobalInt};
Constant *A0G = ConstantArray::get(ArrayTy, A0GVals);
ASSERT_NE(A01, A0G);
GlobalVariable *RefArray =
new GlobalVariable(*M, ArrayTy, false, GlobalValue::ExternalLinkage, A0G);
ASSERT_EQ(A0G, RefArray->getInitializer());
GlobalInt->replaceAllUsesWith(ConstantInt::get(IntTy, 1));
ASSERT_EQ(A01, RefArray->getInitializer());
}
TEST(ConstantsTest, ConstantExprReplaceWithConstant) {
LLVMContext Context;
std::unique_ptr<Module> M(new Module("MyModule", Context));
Type *IntTy = Type::getInt8Ty(Context);
Constant *G1 = new GlobalVariable(*M, IntTy, false,
GlobalValue::ExternalLinkage, nullptr);
Constant *G2 = new GlobalVariable(*M, IntTy, false,
GlobalValue::ExternalLinkage, nullptr);
ASSERT_NE(G1, G2);
Constant *Int1 = ConstantExpr::getPtrToInt(G1, IntTy);
Constant *Int2 = ConstantExpr::getPtrToInt(G2, IntTy);
ASSERT_NE(Int1, Int2);
GlobalVariable *Ref =
new GlobalVariable(*M, IntTy, false, GlobalValue::ExternalLinkage, Int1);
ASSERT_EQ(Int1, Ref->getInitializer());
G1->replaceAllUsesWith(G2);
ASSERT_EQ(Int2, Ref->getInitializer());
}
TEST(ConstantsTest, GEPReplaceWithConstant) {
LLVMContext Context;
std::unique_ptr<Module> M(new Module("MyModule", Context));
Type *IntTy = Type::getInt32Ty(Context);
Type *PtrTy = PointerType::get(IntTy, 0);
auto *C1 = ConstantInt::get(IntTy, 1);
auto *Placeholder = new GlobalVariable(
*M, IntTy, false, GlobalValue::ExternalWeakLinkage, nullptr);
auto *GEP = ConstantExpr::getGetElementPtr(Placeholder, C1);
ASSERT_EQ(GEP->getOperand(0), Placeholder);
auto *Ref =
new GlobalVariable(*M, PtrTy, false, GlobalValue::ExternalLinkage, GEP);
ASSERT_EQ(GEP, Ref->getInitializer());
auto *Global = new GlobalVariable(*M, PtrTy, false,
GlobalValue::ExternalLinkage, nullptr);
auto *Alias = GlobalAlias::create(IntTy, 0, GlobalValue::ExternalLinkage,
"alias", Global, M.get());
Placeholder->replaceAllUsesWith(Alias);
ASSERT_EQ(GEP, Ref->getInitializer());
ASSERT_EQ(GEP->getOperand(0), Alias);
}
TEST(ConstantsTest, AliasCAPI) {
LLVMContext Context;
SMDiagnostic Error;
std::unique_ptr<Module> M =
parseAssemblyString("@g = global i32 42", Error, Context);
GlobalVariable *G = M->getGlobalVariable("g");
Type *I16Ty = Type::getInt16Ty(Context);
Type *I16PTy = PointerType::get(I16Ty, 0);
Constant *Aliasee = ConstantExpr::getBitCast(G, I16PTy);
LLVMValueRef AliasRef =
LLVMAddAlias(wrap(M.get()), wrap(I16PTy), wrap(Aliasee), "a");
ASSERT_EQ(unwrap<GlobalAlias>(AliasRef)->getAliasee(), Aliasee);
}
} // end anonymous namespace
} // end namespace llvm
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