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Add optimizations for dead code removal #1444

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Add optimizations for dead code removal #1444

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a3b88c8
Simplify top-level Makefile.
bbannier May 5, 2023
84556c3
Add optimizer pass to remove dead stores.
bbannier May 5, 2023
210c11d
Implement short-circuiting of logical OR and AND in optimizer.
bbannier May 5, 2023
da1bba0
Constant-fold some expressions involving variables.
bbannier May 5, 2023
06970d4
Add optimizer pass removing dead code.
bbannier May 10, 2023
39e67fe
Add setter for Function attributes.
bbannier May 25, 2023
68c8fc2
Add optimizer pass detecting pure functions and if possible elide calls.
bbannier May 11, 2023
1b3842b
Functions with locals of structs with lifecycle hooks are not pure.
bbannier May 16, 2023
70c3502
Take parameter kind into account when deciding function purity.
bbannier May 24, 2023
234b156
Mark runtime functions `&pure` were possible.
bbannier May 24, 2023
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6 changes: 2 additions & 4 deletions Makefile
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Expand Up @@ -5,12 +5,10 @@ all: build
.PHONY: build doc

build:
@if [ -e build/Makefile ]; then $(MAKE) -C build; else true; fi
@if [ -e build/build.ninja ]; then ninja -C build; else true; fi
cmake --build build/

install:
@if [ -e build/Makefile ]; then $(MAKE) -C build install; else true; fi
@if [ -e build/build.ninja ]; then ninja -C build install; else true; fi
cmake --build build/ --target install

doc:
$(MAKE) -C doc
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6 changes: 3 additions & 3 deletions hilti/lib/hilti.hlt
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Expand Up @@ -24,8 +24,8 @@ declare public void debug(string dbg_stream, any obj) &cxxname="hilti::rt::debug
declare public void debugIndent(string dbg_stream) &cxxname="hilti::rt::debug::indent" &have_prototype;
declare public void debugDedent(string dbg_stream) &cxxname="hilti::rt::debug::dedent" &have_prototype;

declare public time current_time() &cxxname="hilti::rt::time::current_time" &have_prototype;
declare public time mktime(uint<64> y, uint<64> m, uint<64> d, uint<64> H, uint<64> M, uint<64> S) &cxxname="hilti::rt::time::mktime" &have_prototype;
declare public time current_time() &cxxname="hilti::rt::time::current_time" &have_prototype &pure;
declare public time mktime(uint<64> y, uint<64> m, uint<64> d, uint<64> H, uint<64> M, uint<64> S) &cxxname="hilti::rt::time::mktime" &have_prototype &pure;

declare public void abort() &cxxname="hilti::rt::abort_with_backtrace" &have_prototype;

Expand All @@ -49,5 +49,5 @@ public type RecoverableFailure = exception &cxxname="hilti::rt::RecoverableFailu
public type MissingData = exception &cxxname="hilti::rt::MissingData";

# Returns the message associated with an exception.
declare public string exception_what(SystemException excpt) &cxxname="hilti::rt::exception::what" &have_prototype;
declare public string exception_what(SystemException excpt) &cxxname="hilti::rt::exception::what" &have_prototype &pure;
}
1 change: 1 addition & 0 deletions hilti/toolchain/include/ast/function.h
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Expand Up @@ -64,6 +64,7 @@ class Function : public NodeBase {
attributes() == other.attributes() && callingConvention() == other.callingConvention();
}

void setAttributes(const std::optional<AttributeSet>& attributes) { children()[3] = attributes; }
void setBody(const Statement& b) { children()[2] = b; }
void setID(const ID& id) { children()[0] = id; }
void setFunctionType(const type::Function& ftype) { children()[1] = ftype; }
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