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[ir] Cleanup disassembler output 

This CL expands the disassembler output and makes a bit more useful. The
case selector value is changed to an `ir::Constant` instead of the
`constant::Value` to make disassembly easier. The `BuilderImpl` is
updated to not fail in the face of missing implementation but continue
as best as possible.

Bug: tint:1718
Change-Id: I8b275a19bccbb02bb785d311778198bb0c9e0456
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/116547
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
This commit is contained in:
dan sinclair 2023-01-07 23:15:47 +00:00 committed by Dawn LUCI CQ
parent a764437138
commit e3992f2408
4 changed files with 64 additions and 33 deletions
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15
src/tint/ir/builder_impl.cc
View File

@ -45,6 +45,7 @@
#include "src/tint/sem/expression.h"
#include "src/tint/sem/module.h"
#include "src/tint/sem/switch_statement.h"
#include "src/tint/type/void.h"
namespace tint::ir {
namespace {
@ -237,6 +238,8 @@ bool BuilderImpl::EmitStatement(const ast::Statement* stmt) {
diagnostics_.add_warning(
tint::diag::System::IR,
"unknown statement type: " + std::string(stmt->TypeInfo().name), stmt->source);
// TODO(dsinclair): This should return `false`, switch back when all
// the cases are handled.
return true;
});
}
@ -461,7 +464,7 @@ bool BuilderImpl::EmitSwitch(const ast::SwitchStatement* stmt) {
if (selector->IsDefault()) {
selectors.Push({nullptr});
} else {
selectors.Push({selector->Value()->Clone(clone_ctx_)});
selectors.Push({builder.Constant(selector->Value()->Clone(clone_ctx_))});
}
}
@ -575,7 +578,10 @@ utils::Result<Value*> BuilderImpl::EmitExpression(const ast::Expression* expr) {
diagnostics_.add_warning(
tint::diag::System::IR,
"unknown expression type: " + std::string(expr->TypeInfo().name), expr->source);
return utils::Failure;
// TODO(dsinclair): This should return utils::Failure; Switch back
// once all the above cases are handled.
auto* v = builder.ir.types.Get<type::Void>();
return builder.Temp(v);
});
}
@ -590,7 +596,10 @@ bool BuilderImpl::EmitVariable(const ast::Variable* var) {
diagnostics_.add_warning(tint::diag::System::IR,
"unknown variable: " + std::string(var->TypeInfo().name),
var->source);
return false;
// TODO(dsinclair): This should return `false`, switch back when all
// the cases are handled.
return true;
});
}

20
src/tint/ir/builder_impl_test.cc
View File

@ -1125,12 +1125,14 @@ TEST_F(IR_BuilderImplTest, Switch) {
auto* func = m.functions[0];
ASSERT_EQ(1u, flow->cases[0].selectors.Length());
ASSERT_TRUE(flow->cases[0].selectors[0].val->Is<constant::Scalar<tint::i32>>());
EXPECT_EQ(0_i, flow->cases[0].selectors[0].val->As<constant::Scalar<tint::i32>>()->ValueOf());
ASSERT_TRUE(flow->cases[0].selectors[0].val->value->Is<constant::Scalar<tint::i32>>());
EXPECT_EQ(0_i,
flow->cases[0].selectors[0].val->value->As<constant::Scalar<tint::i32>>()->ValueOf());
ASSERT_EQ(1u, flow->cases[1].selectors.Length());
ASSERT_TRUE(flow->cases[1].selectors[0].val->Is<constant::Scalar<tint::i32>>());
EXPECT_EQ(1_i, flow->cases[1].selectors[0].val->As<constant::Scalar<tint::i32>>()->ValueOf());
ASSERT_TRUE(flow->cases[1].selectors[0].val->value->Is<constant::Scalar<tint::i32>>());
EXPECT_EQ(1_i,
flow->cases[1].selectors[0].val->value->As<constant::Scalar<tint::i32>>()->ValueOf());
ASSERT_EQ(1u, flow->cases[2].selectors.Length());
EXPECT_TRUE(flow->cases[2].selectors[0].IsDefault());
@ -1227,8 +1229,9 @@ TEST_F(IR_BuilderImplTest, Switch_WithBreak) {
auto* func = m.functions[0];
ASSERT_EQ(1u, flow->cases[0].selectors.Length());
ASSERT_TRUE(flow->cases[0].selectors[0].val->Is<constant::Scalar<tint::i32>>());
EXPECT_EQ(0_i, flow->cases[0].selectors[0].val->As<constant::Scalar<tint::i32>>()->ValueOf());
ASSERT_TRUE(flow->cases[0].selectors[0].val->value->Is<constant::Scalar<tint::i32>>());
EXPECT_EQ(0_i,
flow->cases[0].selectors[0].val->value->As<constant::Scalar<tint::i32>>()->ValueOf());
ASSERT_EQ(1u, flow->cases[1].selectors.Length());
EXPECT_TRUE(flow->cases[1].selectors[0].IsDefault());
@ -1291,8 +1294,9 @@ TEST_F(IR_BuilderImplTest, Switch_AllReturn) {
auto* func = m.functions[0];
ASSERT_EQ(1u, flow->cases[0].selectors.Length());
ASSERT_TRUE(flow->cases[0].selectors[0].val->Is<constant::Scalar<tint::i32>>());
EXPECT_EQ(0_i, flow->cases[0].selectors[0].val->As<constant::Scalar<tint::i32>>()->ValueOf());
ASSERT_TRUE(flow->cases[0].selectors[0].val->value->Is<constant::Scalar<tint::i32>>());
EXPECT_EQ(0_i,
flow->cases[0].selectors[0].val->value->As<constant::Scalar<tint::i32>>()->ValueOf());
ASSERT_EQ(1u, flow->cases[1].selectors.Length());
EXPECT_TRUE(flow->cases[1].selectors[0].IsDefault());

58
src/tint/ir/disassembler.cc
View File

@ -62,6 +62,7 @@ std::ostream& Disassembler::Indent() {
void Disassembler::EmitBlockInstructions(const Block* b) {
for (const auto* instr : b->instructions) {
Indent();
instr->ToString(out_, mod_.symbols) << std::endl;
}
}
@ -85,7 +86,8 @@ void Disassembler::Walk(const FlowNode* node) {
tint::Switch(
node,
[&](const ir::Function* f) {
Indent() << "%" << GetIdForNode(f) << " = Function" << std::endl;
Indent() << "%bb" << GetIdForNode(f) << " = Function " << mod_.symbols.NameFor(f->name)
<< std::endl;
{
ScopedIndent func_indent(&indent_size_);
@ -95,76 +97,92 @@ void Disassembler::Walk(const FlowNode* node) {
Walk(f->end_target);
},
[&](const ir::Block* b) {
Indent() << "%" << GetIdForNode(b) << " = Block" << std::endl;
Indent() << "%bb" << GetIdForNode(b) << " = Block" << std::endl;
EmitBlockInstructions(b);
if (b->branch.target->Is<Terminator>()) {
Indent() << "Return ";
Indent() << "Return";
} else {
Indent() << "Branch ";
Indent() << "BranchTo "
<< "%bb" << GetIdForNode(b->branch.target);
}
out_ << GetIdForNode(b->branch.target);
out_ << " (";
for (const auto* v : b->branch.args) {
out_ << " ";
if (v != b->branch.args.Front()) {
out_ << ", ";
}
v->ToString(out_, mod_.symbols);
}
out_ << std::endl;
out_ << ")" << std::endl << std::endl;
Walk(b->branch.target);
},
[&](const ir::Switch* s) {
Indent() << "%" << GetIdForNode(s) << " = Switch (" << s->condition << ")" << std::endl;
Indent() << "%bb" << GetIdForNode(s) << " = Switch (";
s->condition->ToString(out_, mod_.symbols);
out_ << ")" << std::endl;
{
ScopedIndent switch_indent(&indent_size_);
ScopedStopNode scope(&stop_nodes_, s->merge.target);
for (const auto& c : s->cases) {
Indent() << "Case" << std::endl;
Indent() << "# Case ";
for (const auto& selector : c.selectors) {
if (selector.IsDefault()) {
out_ << "default ";
} else {
selector.val->ToString(out_, mod_.symbols);
}
}
out_ << std::endl;
ScopedIndent case_indent(&indent_size_);
Walk(c.start.target);
}
}
Indent() << "Switch Merge" << std::endl;
Indent() << "# Switch Merge" << std::endl;
Walk(s->merge.target);
},
[&](const ir::If* i) {
Indent() << "%" << GetIdForNode(i) << " = if (" << i->condition << ")" << std::endl;
Indent() << "%bb" << GetIdForNode(i) << " = if (";
i->condition->ToString(out_, mod_.symbols);
out_ << ")" << std::endl;
{
ScopedIndent if_indent(&indent_size_);
ScopedStopNode scope(&stop_nodes_, i->merge.target);
Indent() << "true branch" << std::endl;
Indent() << "# true branch" << std::endl;
Walk(i->true_.target);
Indent() << "false branch" << std::endl;
Indent() << "# false branch" << std::endl;
Walk(i->false_.target);
}
Indent() << "if merge" << std::endl;
Indent() << "# if merge" << std::endl;
Walk(i->merge.target);
},
[&](const ir::Loop* l) {
Indent() << "%" << GetIdForNode(l) << " = loop" << std::endl;
Indent() << "%bb" << GetIdForNode(l) << " = loop" << std::endl;
{
ScopedStopNode loop_scope(&stop_nodes_, l->merge.target);
ScopedIndent loop_indent(&indent_size_);
{
ScopedStopNode inner_scope(&stop_nodes_, l->continuing.target);
Indent() << "loop start" << std::endl;
Indent() << "# loop start" << std::endl;
Walk(l->start.target);
}
Indent() << "loop continuing" << std::endl;
Indent() << "# loop continuing" << std::endl;
ScopedIndent continuing_indent(&indent_size_);
Walk(l->continuing.target);
}
Indent() << "loop merge" << std::endl;
Indent() << "# loop merge" << std::endl;
Walk(l->merge.target);
},
[&](const ir::Terminator*) { Indent() << "Function end" << std::endl; });
[&](const ir::Terminator*) { Indent() << "FunctionEnd" << std::endl
<< std::endl; });
}
std::string Disassembler::Disassemble() {

4
src/tint/ir/switch.h
View File

@ -15,9 +15,9 @@
#ifndef SRC_TINT_IR_SWITCH_H_
#define SRC_TINT_IR_SWITCH_H_
#include "src/tint/constant/value.h"
#include "src/tint/ir/block.h"
#include "src/tint/ir/branch.h"
#include "src/tint/ir/constant.h"
#include "src/tint/ir/flow_node.h"
#include "src/tint/ir/value.h"
@ -32,7 +32,7 @@ class Switch : public Castable<Switch, FlowNode> {
bool IsDefault() const { return val == nullptr; }
/// The selector value, or nullptr if this is the default selector
constant::Value* val = nullptr;
Constant* val = nullptr;
};
/// A case label in the struct