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IR: Expose the method 'getLocalSlot' in the module slot tracker.

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This commit publicly exposes the method 'getLocalSlot' in the
'ModuleSlotTracker' class.

This change is useful for MIR serialization, to serialize the unnamed basic
block and unnamed alloca references.

Reviewers: Duncan P. N. Exon Smith


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243336 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alex Lorenz 2015-07-27 22:31:04 +00:00
parent 10da90aaf3
commit 9adb2129bd
3 changed files with 73 additions and 0 deletions
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8
include/llvm/IR/ModuleSlotTracker.h
View File

@ -17,6 +17,7 @@ namespace llvm {
class Module;
class Function;
class SlotTracker;
class Value;
/// Manage lifetime of a slot tracker for printing IR.
///
@ -61,6 +62,13 @@ public:
/// Purge the currently incorporated function and incorporate \c F. If \c F
/// is currently incorporated, this is a no-op.
void incorporateFunction(const Function &F);
/// Return the slot number of the specified local value.
///
/// A function that defines this value should be incorporated prior to calling
/// this method.
/// Return -1 if the value is not in the function's SlotTracker.
int getLocalSlot(const Value *V);
};
} // end namespace llvm

5
lib/IR/AsmWriter.cpp
View File

@ -702,6 +702,11 @@ void ModuleSlotTracker::incorporateFunction(const Function &F) {
this->F = &F;
}
int ModuleSlotTracker::getLocalSlot(const Value *V) {
assert(F && "No function incorporated");
return Machine->getLocalSlot(V);
}
static SlotTracker *createSlotTracker(const Module *M) {
return new SlotTracker(M);
}

60
unittests/IR/ValueTest.cpp
View File

@ -175,4 +175,64 @@ TEST(ValueTest, printSlots) {
#undef CHECK_PRINT_AS_OPERAND
}
TEST(ValueTest, getLocalSlots) {
// Verify that the getLocalSlot method returns the correct slot numbers.
LLVMContext C;
const char *ModuleString = "define void @f(i32 %x, i32 %y) {\n"
"entry:\n"
" %0 = add i32 %y, 1\n"
" %1 = add i32 %y, 1\n"
" br label %2\n"
"\n"
" ret void\n"
"}\n";
SMDiagnostic Err;
std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
Function *F = M->getFunction("f");
ASSERT_TRUE(F);
ASSERT_FALSE(F->empty());
BasicBlock &EntryBB = F->getEntryBlock();
ASSERT_EQ(3u, EntryBB.size());
BasicBlock *BB2 = ++F->begin();
ASSERT_TRUE(BB2);
Instruction *I0 = EntryBB.begin();
ASSERT_TRUE(I0);
Instruction *I1 = ++EntryBB.begin();
ASSERT_TRUE(I1);
ModuleSlotTracker MST(M.get());
MST.incorporateFunction(*F);
EXPECT_EQ(MST.getLocalSlot(I0), 0);
EXPECT_EQ(MST.getLocalSlot(I1), 1);
EXPECT_EQ(MST.getLocalSlot(&EntryBB), -1);
EXPECT_EQ(MST.getLocalSlot(BB2), 2);
}
#if defined(GTEST_HAS_DEATH_TEST) && !defined(NDEBUG)
TEST(ValueTest, getLocalSlotDeath) {
LLVMContext C;
const char *ModuleString = "define void @f(i32 %x, i32 %y) {\n"
"entry:\n"
" %0 = add i32 %y, 1\n"
" %1 = add i32 %y, 1\n"
" br label %2\n"
"\n"
" ret void\n"
"}\n";
SMDiagnostic Err;
std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
Function *F = M->getFunction("f");
ASSERT_TRUE(F);
ASSERT_FALSE(F->empty());
BasicBlock *BB2 = ++F->begin();
ASSERT_TRUE(BB2);
ModuleSlotTracker MST(M.get());
EXPECT_DEATH(MST.getLocalSlot(BB2), "No function incorporated");
}
#endif
} // end anonymous namespace