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[SandboxIR] Implement getNumBits for Instructions #110748

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Merged
merged 2 commits into from
Oct 1, 2024
Merged

[SandboxIR] Implement getNumBits for Instructions #110748

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c7a4448
[SandboxIR] Implement getNumBits for Instructions
Sterling-Augustine Oct 1, 2024
82bb9ca
Now with a proper test
Sterling-Augustine Oct 1, 2024
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3 changes: 3 additions & 0 deletions llvm/include/llvm/SandboxIR/Instruction.h
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Original file line number Diff line number Diff line change
Expand Up @@ -97,6 +97,9 @@ class Instruction : public User {

const char *getOpcodeName() const { return getOpcodeName(Opc); }

const DataLayout &getDataLayout() const {
return cast<llvm::Instruction>(Val)->getModule()->getDataLayout();
}
// Note that these functions below are calling into llvm::Instruction.
// A sandbox IR instruction could introduce a new opcode that could change the
// behavior of one of these functions. It is better that these functions are
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6 changes: 6 additions & 0 deletions llvm/include/llvm/SandboxIR/Utils.h
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Expand Up @@ -56,6 +56,12 @@ class Utils {
return DL.getTypeSizeInBits(Ty->LLVMTy);
}

/// \Returns the number of bits required to represent the operands or
/// return value of \p I.
static unsigned getNumBits(Instruction *I) {
return I->getDataLayout().getTypeSizeInBits(getExpectedType(I)->LLVMTy);
}

/// Equivalent to MemoryLocation::getOrNone(I).
static std::optional<llvm::MemoryLocation>
memoryLocationGetOrNone(const Instruction *I) {
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20 changes: 0 additions & 20 deletions llvm/unittests/SandboxIR/SandboxIRTest.cpp
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Expand Up @@ -1512,26 +1512,6 @@ define void @bar(float %v, ptr %ptr) {
EXPECT_EQ(sandboxir::Utils::getExpectedValue(RetV), nullptr);
}

TEST_F(SandboxIRTest, GetNumBits) {
parseIR(C, R"IR(
define void @foo(float %arg0, double %arg1, i8 %arg2, i64 %arg3) {
bb0:
ret void
}
)IR");
llvm::Function &Foo = *M->getFunction("foo");
sandboxir::Context Ctx(C);
sandboxir::Function *F = Ctx.createFunction(&Foo);
const DataLayout &DL = M->getDataLayout();
// getNumBits for scalars
EXPECT_EQ(sandboxir::Utils::getNumBits(F->getArg(0), DL),
DL.getTypeSizeInBits(Type::getFloatTy(C)));
EXPECT_EQ(sandboxir::Utils::getNumBits(F->getArg(1), DL),
DL.getTypeSizeInBits(Type::getDoubleTy(C)));
EXPECT_EQ(sandboxir::Utils::getNumBits(F->getArg(2), DL), 8u);
EXPECT_EQ(sandboxir::Utils::getNumBits(F->getArg(3), DL), 64u);
}

TEST_F(SandboxIRTest, RAUW_RUWIf) {
parseIR(C, R"IR(
define void @foo(ptr %ptr) {
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38 changes: 38 additions & 0 deletions llvm/unittests/SandboxIR/UtilsTest.cpp
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Expand Up @@ -135,3 +135,41 @@ define void @foo(ptr %ptr) {
EXPECT_FALSE(sandboxir::Utils::atLowerAddress(L1, L0, SE, DL));
EXPECT_FALSE(sandboxir::Utils::atLowerAddress(L3, V3L3, SE, DL));
}

TEST_F(UtilsTest, GetNumBits) {
parseIR(C, R"IR(
define void @foo(float %arg0, double %arg1, i8 %arg2, i64 %arg3, ptr %arg4) {
bb0:
%ld0 = load float, ptr %arg4
%ld1 = load double, ptr %arg4
%ld2 = load i8, ptr %arg4
%ld3 = load i64, ptr %arg4
ret void
}
)IR");
llvm::Function &Foo = *M->getFunction("foo");
sandboxir::Context Ctx(C);
sandboxir::Function *F = Ctx.createFunction(&Foo);
const DataLayout &DL = M->getDataLayout();
// getNumBits for scalars via the Value overload
EXPECT_EQ(sandboxir::Utils::getNumBits(F->getArg(0), DL),
DL.getTypeSizeInBits(Type::getFloatTy(C)));
EXPECT_EQ(sandboxir::Utils::getNumBits(F->getArg(1), DL),
DL.getTypeSizeInBits(Type::getDoubleTy(C)));
EXPECT_EQ(sandboxir::Utils::getNumBits(F->getArg(2), DL), 8u);
EXPECT_EQ(sandboxir::Utils::getNumBits(F->getArg(3), DL), 64u);

auto &BB = *F->begin();
auto It = BB.begin();
auto *L0 = cast<sandboxir::LoadInst>(&*It++);
auto *L1 = cast<sandboxir::LoadInst>(&*It++);
auto *L2 = cast<sandboxir::LoadInst>(&*It++);
auto *L3 = cast<sandboxir::LoadInst>(&*It++);
// getNumBits for scalars via the Instruction overload
EXPECT_EQ(sandboxir::Utils::getNumBits(L0),
DL.getTypeSizeInBits(Type::getFloatTy(C)));
EXPECT_EQ(sandboxir::Utils::getNumBits(L1),
DL.getTypeSizeInBits(Type::getDoubleTy(C)));
EXPECT_EQ(sandboxir::Utils::getNumBits(L2), 8u);
EXPECT_EQ(sandboxir::Utils::getNumBits(L3), 64u);
}
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