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87cd774844
This patch changes GlobalAlias to point to an arbitrary ConstantExpr and it is
up to MC (or the system assembler) to decide if that expression is valid or not.
This reduces our ability to diagnose invalid uses and how early we can spot
them, but it also lets us do things like
@test5 = alias inttoptr(i32 sub (i32 ptrtoint (i32* @test2 to i32),
i32 ptrtoint (i32* @bar to i32)) to i32*)
An important implication of this patch is that the notion of aliased global
doesn't exist any more. The alias has to encode the information needed to
access it in its metadata (linkage, visibility, type, etc).
Another consequence to notice is that getSection has to return a "const char *".
It could return a NullTerminatedStringRef if there was such a thing, but when
that was proposed the decision was to just uses "const char*" for that.
llvm-svn: 210062
279 lines
11 KiB
C++
279 lines
11 KiB
C++
//===- llvm/unittest/IR/ConstantsTest.cpp - Constants unit tests ----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/DerivedTypes.h"
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#include "llvm/IR/InstrTypes.h"
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#include "llvm/IR/Instruction.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "gtest/gtest.h"
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namespace llvm {
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namespace {
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TEST(ConstantsTest, Integer_i1) {
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IntegerType* Int1 = IntegerType::get(getGlobalContext(), 1);
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Constant* One = ConstantInt::get(Int1, 1, true);
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Constant* Zero = ConstantInt::get(Int1, 0);
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Constant* NegOne = ConstantInt::get(Int1, static_cast<uint64_t>(-1), true);
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EXPECT_EQ(NegOne, ConstantInt::getSigned(Int1, -1));
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Constant* Undef = UndefValue::get(Int1);
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// Input: @b = constant i1 add(i1 1 , i1 1)
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// Output: @b = constant i1 false
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EXPECT_EQ(Zero, ConstantExpr::getAdd(One, One));
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// @c = constant i1 add(i1 -1, i1 1)
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// @c = constant i1 false
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EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, One));
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// @d = constant i1 add(i1 -1, i1 -1)
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// @d = constant i1 false
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EXPECT_EQ(Zero, ConstantExpr::getAdd(NegOne, NegOne));
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// @e = constant i1 sub(i1 -1, i1 1)
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// @e = constant i1 false
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EXPECT_EQ(Zero, ConstantExpr::getSub(NegOne, One));
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// @f = constant i1 sub(i1 1 , i1 -1)
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// @f = constant i1 false
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EXPECT_EQ(Zero, ConstantExpr::getSub(One, NegOne));
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// @g = constant i1 sub(i1 1 , i1 1)
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// @g = constant i1 false
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EXPECT_EQ(Zero, ConstantExpr::getSub(One, One));
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// @h = constant i1 shl(i1 1 , i1 1) ; undefined
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// @h = constant i1 undef
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EXPECT_EQ(Undef, ConstantExpr::getShl(One, One));
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// @i = constant i1 shl(i1 1 , i1 0)
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// @i = constant i1 true
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EXPECT_EQ(One, ConstantExpr::getShl(One, Zero));
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// @j = constant i1 lshr(i1 1, i1 1) ; undefined
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// @j = constant i1 undef
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EXPECT_EQ(Undef, ConstantExpr::getLShr(One, One));
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// @m = constant i1 ashr(i1 1, i1 1) ; undefined
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// @m = constant i1 undef
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EXPECT_EQ(Undef, ConstantExpr::getAShr(One, One));
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// @n = constant i1 mul(i1 -1, i1 1)
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// @n = constant i1 true
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EXPECT_EQ(One, ConstantExpr::getMul(NegOne, One));
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// @o = constant i1 sdiv(i1 -1, i1 1) ; overflow
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// @o = constant i1 true
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EXPECT_EQ(One, ConstantExpr::getSDiv(NegOne, One));
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// @p = constant i1 sdiv(i1 1 , i1 -1); overflow
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// @p = constant i1 true
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EXPECT_EQ(One, ConstantExpr::getSDiv(One, NegOne));
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// @q = constant i1 udiv(i1 -1, i1 1)
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// @q = constant i1 true
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EXPECT_EQ(One, ConstantExpr::getUDiv(NegOne, One));
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// @r = constant i1 udiv(i1 1, i1 -1)
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// @r = constant i1 true
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EXPECT_EQ(One, ConstantExpr::getUDiv(One, NegOne));
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// @s = constant i1 srem(i1 -1, i1 1) ; overflow
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// @s = constant i1 false
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EXPECT_EQ(Zero, ConstantExpr::getSRem(NegOne, One));
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// @t = constant i1 urem(i1 -1, i1 1)
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// @t = constant i1 false
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EXPECT_EQ(Zero, ConstantExpr::getURem(NegOne, One));
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// @u = constant i1 srem(i1 1, i1 -1) ; overflow
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// @u = constant i1 false
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EXPECT_EQ(Zero, ConstantExpr::getSRem(One, NegOne));
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}
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TEST(ConstantsTest, IntSigns) {
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IntegerType* Int8Ty = Type::getInt8Ty(getGlobalContext());
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EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, false)->getSExtValue());
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EXPECT_EQ(100, ConstantInt::get(Int8Ty, 100, true)->getSExtValue());
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EXPECT_EQ(100, ConstantInt::getSigned(Int8Ty, 100)->getSExtValue());
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EXPECT_EQ(-50, ConstantInt::get(Int8Ty, 206)->getSExtValue());
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EXPECT_EQ(-50, ConstantInt::getSigned(Int8Ty, -50)->getSExtValue());
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EXPECT_EQ(206U, ConstantInt::getSigned(Int8Ty, -50)->getZExtValue());
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// Overflow is handled by truncation.
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EXPECT_EQ(0x3b, ConstantInt::get(Int8Ty, 0x13b)->getSExtValue());
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}
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TEST(ConstantsTest, FP128Test) {
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Type *FP128Ty = Type::getFP128Ty(getGlobalContext());
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IntegerType *Int128Ty = Type::getIntNTy(getGlobalContext(), 128);
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Constant *Zero128 = Constant::getNullValue(Int128Ty);
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Constant *X = ConstantExpr::getUIToFP(Zero128, FP128Ty);
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EXPECT_TRUE(isa<ConstantFP>(X));
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}
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TEST(ConstantsTest, PointerCast) {
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LLVMContext &C(getGlobalContext());
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Type *Int8PtrTy = Type::getInt8PtrTy(C);
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Type *Int32PtrTy = Type::getInt32PtrTy(C);
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Type *Int64Ty = Type::getInt64Ty(C);
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VectorType *Int8PtrVecTy = VectorType::get(Int8PtrTy, 4);
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VectorType *Int32PtrVecTy = VectorType::get(Int32PtrTy, 4);
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VectorType *Int64VecTy = VectorType::get(Int64Ty, 4);
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// ptrtoint i8* to i64
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EXPECT_EQ(Constant::getNullValue(Int64Ty),
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ConstantExpr::getPointerCast(
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Constant::getNullValue(Int8PtrTy), Int64Ty));
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// bitcast i8* to i32*
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EXPECT_EQ(Constant::getNullValue(Int32PtrTy),
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ConstantExpr::getPointerCast(
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Constant::getNullValue(Int8PtrTy), Int32PtrTy));
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// ptrtoint <4 x i8*> to <4 x i64>
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EXPECT_EQ(Constant::getNullValue(Int64VecTy),
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ConstantExpr::getPointerCast(
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Constant::getNullValue(Int8PtrVecTy), Int64VecTy));
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// bitcast <4 x i8*> to <4 x i32*>
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EXPECT_EQ(Constant::getNullValue(Int32PtrVecTy),
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ConstantExpr::getPointerCast(
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Constant::getNullValue(Int8PtrVecTy), Int32PtrVecTy));
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}
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#define CHECK(x, y) { \
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std::string __s; \
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raw_string_ostream __o(__s); \
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Instruction *__I = cast<ConstantExpr>(x)->getAsInstruction(); \
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__I->print(__o); \
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delete __I; \
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__o.flush(); \
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EXPECT_EQ(std::string(" <badref> = " y), __s); \
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}
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TEST(ConstantsTest, AsInstructionsTest) {
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std::unique_ptr<Module> M(new Module("MyModule", getGlobalContext()));
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Type *Int64Ty = Type::getInt64Ty(getGlobalContext());
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Type *Int32Ty = Type::getInt32Ty(getGlobalContext());
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Type *Int16Ty = Type::getInt16Ty(getGlobalContext());
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Type *Int1Ty = Type::getInt1Ty(getGlobalContext());
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Type *FloatTy = Type::getFloatTy(getGlobalContext());
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Type *DoubleTy = Type::getDoubleTy(getGlobalContext());
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Constant *Global = M->getOrInsertGlobal("dummy",
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PointerType::getUnqual(Int32Ty));
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Constant *Global2 = M->getOrInsertGlobal("dummy2",
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PointerType::getUnqual(Int32Ty));
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Constant *P0 = ConstantExpr::getPtrToInt(Global, Int32Ty);
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Constant *P1 = ConstantExpr::getUIToFP(P0, FloatTy);
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Constant *P2 = ConstantExpr::getUIToFP(P0, DoubleTy);
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Constant *P3 = ConstantExpr::getTrunc(P0, Int1Ty);
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Constant *P4 = ConstantExpr::getPtrToInt(Global2, Int32Ty);
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Constant *P5 = ConstantExpr::getUIToFP(P4, FloatTy);
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Constant *P6 = ConstantExpr::getBitCast(P4, VectorType::get(Int16Ty, 2));
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Constant *One = ConstantInt::get(Int32Ty, 1);
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#define P0STR "ptrtoint (i32** @dummy to i32)"
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#define P1STR "uitofp (i32 ptrtoint (i32** @dummy to i32) to float)"
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#define P2STR "uitofp (i32 ptrtoint (i32** @dummy to i32) to double)"
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#define P3STR "ptrtoint (i32** @dummy to i1)"
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#define P4STR "ptrtoint (i32** @dummy2 to i32)"
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#define P5STR "uitofp (i32 ptrtoint (i32** @dummy2 to i32) to float)"
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#define P6STR "bitcast (i32 ptrtoint (i32** @dummy2 to i32) to <2 x i16>)"
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CHECK(ConstantExpr::getNeg(P0), "sub i32 0, " P0STR);
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CHECK(ConstantExpr::getFNeg(P1), "fsub float -0.000000e+00, " P1STR);
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CHECK(ConstantExpr::getNot(P0), "xor i32 " P0STR ", -1");
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CHECK(ConstantExpr::getAdd(P0, P0), "add i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getAdd(P0, P0, false, true), "add nsw i32 " P0STR ", "
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P0STR);
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CHECK(ConstantExpr::getAdd(P0, P0, true, true), "add nuw nsw i32 " P0STR ", "
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P0STR);
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CHECK(ConstantExpr::getFAdd(P1, P1), "fadd float " P1STR ", " P1STR);
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CHECK(ConstantExpr::getSub(P0, P0), "sub i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getFSub(P1, P1), "fsub float " P1STR ", " P1STR);
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CHECK(ConstantExpr::getMul(P0, P0), "mul i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getFMul(P1, P1), "fmul float " P1STR ", " P1STR);
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CHECK(ConstantExpr::getUDiv(P0, P0), "udiv i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getSDiv(P0, P0), "sdiv i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getFDiv(P1, P1), "fdiv float " P1STR ", " P1STR);
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CHECK(ConstantExpr::getURem(P0, P0), "urem i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getSRem(P0, P0), "srem i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getFRem(P1, P1), "frem float " P1STR ", " P1STR);
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CHECK(ConstantExpr::getAnd(P0, P0), "and i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getOr(P0, P0), "or i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getXor(P0, P0), "xor i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getShl(P0, P0), "shl i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getShl(P0, P0, true), "shl nuw i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getShl(P0, P0, false, true), "shl nsw i32 " P0STR ", "
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P0STR);
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CHECK(ConstantExpr::getLShr(P0, P0, false), "lshr i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getLShr(P0, P0, true), "lshr exact i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getAShr(P0, P0, false), "ashr i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getAShr(P0, P0, true), "ashr exact i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getSExt(P0, Int64Ty), "sext i32 " P0STR " to i64");
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CHECK(ConstantExpr::getZExt(P0, Int64Ty), "zext i32 " P0STR " to i64");
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CHECK(ConstantExpr::getFPTrunc(P2, FloatTy), "fptrunc double " P2STR
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" to float");
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CHECK(ConstantExpr::getFPExtend(P1, DoubleTy), "fpext float " P1STR
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" to double");
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CHECK(ConstantExpr::getExactUDiv(P0, P0), "udiv exact i32 " P0STR ", " P0STR);
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CHECK(ConstantExpr::getSelect(P3, P0, P4), "select i1 " P3STR ", i32 " P0STR
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", i32 " P4STR);
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CHECK(ConstantExpr::getICmp(CmpInst::ICMP_EQ, P0, P4), "icmp eq i32 " P0STR
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", " P4STR);
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CHECK(ConstantExpr::getFCmp(CmpInst::FCMP_ULT, P1, P5), "fcmp ult float "
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P1STR ", " P5STR);
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std::vector<Constant*> V;
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V.push_back(One);
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// FIXME: getGetElementPtr() actually creates an inbounds ConstantGEP,
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// not a normal one!
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//CHECK(ConstantExpr::getGetElementPtr(Global, V, false),
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// "getelementptr i32** @dummy, i32 1");
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CHECK(ConstantExpr::getInBoundsGetElementPtr(Global, V),
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"getelementptr inbounds i32** @dummy, i32 1");
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CHECK(ConstantExpr::getExtractElement(P6, One), "extractelement <2 x i16> "
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P6STR ", i32 1");
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}
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#ifdef GTEST_HAS_DEATH_TEST
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#ifndef NDEBUG
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TEST(ConstantsTest, ReplaceWithConstantTest) {
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std::unique_ptr<Module> M(new Module("MyModule", getGlobalContext()));
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Type *Int32Ty = Type::getInt32Ty(getGlobalContext());
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Constant *One = ConstantInt::get(Int32Ty, 1);
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Constant *Global =
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M->getOrInsertGlobal("dummy", PointerType::getUnqual(Int32Ty));
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Constant *GEP = ConstantExpr::getGetElementPtr(Global, One);
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EXPECT_DEATH(Global->replaceAllUsesWith(GEP),
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"this->replaceAllUsesWith\\(expr\\(this\\)\\) is NOT valid!");
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}
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#endif
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#endif
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#undef CHECK
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} // end anonymous namespace
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} // end namespace llvm
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