Support LLVM 17

[chenrui333]

Looks like there is some challenge of building the latest release against LLVM 17

error build log

[ 59%] Building CXX object Enzyme/CMakeFiles/LLDEnzyme-17.dir/DifferentialUseAnalysis.cpp.o
cd /tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/build/Enzyme && /opt/homebrew/Library/Homebrew/shims/mac/super/clang++ -DENZYME_RUNPASS -DENZYME_VERSION_MAJOR=0 -DENZYME_VERSION_MINOR=0 -DENZYME_VERSION_PATCH=79 -I/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/build/include -I/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/build/Enzyme -Wall -fPIC -fno-rtti  -O2 -std=gnu++17 -arch arm64 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX13.sdk -fPIC   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -MD -MT Enzyme/CMakeFiles/LLDEnzyme-17.dir/DifferentialUseAnalysis.cpp.o -MF CMakeFiles/LLDEnzyme-17.dir/DifferentialUseAnalysis.cpp.o.d -o CMakeFiles/LLDEnzyme-17.dir/DifferentialUseAnalysis.cpp.o -c /tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/enzyme/Enzyme/DifferentialUseAnalysis.cpp
/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/enzyme/Enzyme/CApi.cpp:1315:13: warning: unused variable 'idx' [-Wunused-variable]
  for (auto idx : enzyme_srets) {
            ^
/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/enzyme/Enzyme/CApi.cpp:1489:53: warning: braces around scalar initializer [-Wbraced-scalar-init]
        offset = recur(B, B.CreateExtractElement(V, {i}), offset);
                                                    ^~~
/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/enzyme/Enzyme/CacheUtility.cpp:1389:29: warning: 'supportsTypedPointers' is deprecated: Always returns false [-Wdeprecated-declarations]
  if (tostore->getContext().supportsTypedPointers()) {
                            ^
/opt/homebrew/opt/llvm/include/llvm/IR/LLVMContext.h:323:5: note: 'supportsTypedPointers' has been explicitly marked deprecated here
  [[deprecated("Always returns false")]]
    ^
/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/enzyme/Enzyme/CacheUtility.cpp:1391:47: error: no member named 'getPointerElementType' in 'llvm::Type'; did you mean 'getArrayElementType'?
    if (tostore->getType() != loc->getType()->getPointerElementType()) {
                                              ^~~~~~~~~~~~~~~~~~~~~
                                              getArrayElementType
/opt/homebrew/opt/llvm/include/llvm/IR/Type.h:405:9: note: 'getArrayElementType' declared here
  Type *getArrayElementType() const {
        ^
/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/enzyme/Enzyme/CacheUtility.cpp:1396:50: error: no member named 'getPointerElementType' in 'llvm::Type'; did you mean 'getArrayElementType'?
    assert(tostore->getType() == loc->getType()->getPointerElementType());
                                                 ^~~~~~~~~~~~~~~~~~~~~
                                                 getArrayElementType
/Library/Developer/CommandLineTools/SDKs/MacOSX13.sdk/usr/include/assert.h:99:25: note: expanded from macro 'assert'
    (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __ASSERT_FILE_NAME, __LINE__, #e) : (void)0)
                        ^
/opt/homebrew/opt/llvm/include/llvm/IR/Type.h:405:9: note: 'getArrayElementType' declared here
  Type *getArrayElementType() const {
        ^
/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/enzyme/Enzyme/DiffeGradientUtils.cpp:179:47: warning: 'getPrefTypeAlignment' is deprecated: use getPrefTypeAlign instead [-Wdeprecated-declarations]
        oldFunc->getParent()->getDataLayout().getPrefTypeAlignment(type);
                                              ^~~~~~~~~~~~~~~~~~~~
                                              getPrefTypeAlign
/opt/homebrew/opt/llvm/include/llvm/IR/DataLayout.h:538:3: note: 'getPrefTypeAlignment' has been explicitly marked deprecated here
  LLVM_DEPRECATED("use getPrefTypeAlign instead", "getPrefTypeAlign")
  ^
/opt/homebrew/opt/llvm/include/llvm/Support/Compiler.h:155:50: note: expanded from macro 'LLVM_DEPRECATED'
#define LLVM_DEPRECATED(MSG, FIX) __attribute__((deprecated(MSG, FIX)))
                                                 ^
/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/enzyme/Enzyme/DiffeGradientUtils.cpp:186:25: warning: 'supportsTypedPointers' is deprecated: Always returns false [-Wdeprecated-declarations]
  if (val->getContext().supportsTypedPointers()) {
                        ^
/opt/homebrew/opt/llvm/include/llvm/IR/LLVMContext.h:323:5: note: 'supportsTypedPointers' has been explicitly marked deprecated here
  [[deprecated("Always returns false")]]
    ^
/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/enzyme/Enzyme/DiffeGradientUtils.cpp:188:43: error: no member named 'getPointerElementType' in 'llvm::PointerType'; did you mean 'getArrayElementType'?
    assert(differentials[val]->getType()->getPointerElementType() == type);
                                          ^~~~~~~~~~~~~~~~~~~~~
                                          getArrayElementType
/Library/Developer/CommandLineTools/SDKs/MacOSX13.sdk/usr/include/assert.h:99:25: note: expanded from macro 'assert'
    (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __ASSERT_FILE_NAME, __LINE__, #e) : (void)0)
                        ^
/opt/homebrew/opt/llvm/include/llvm/IR/Type.h:405:9: note: 'getArrayElementType' declared here
  Type *getArrayElementType() const {
        ^
/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/enzyme/Enzyme/DiffeGradientUtils.cpp:524:27: warning: 'supportsTypedPointers' is deprecated: Always returns false [-Wdeprecated-declarations]
  if (toset->getContext().supportsTypedPointers()) {
                          ^
/opt/homebrew/opt/llvm/include/llvm/IR/LLVMContext.h:323:5: note: 'supportsTypedPointers' has been explicitly marked deprecated here
  [[deprecated("Always returns false")]]
    ^
/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/enzyme/Enzyme/DiffeGradientUtils.cpp:526:49: error: no member named 'getPointerElementType' in 'llvm::Type'; did you mean 'getArrayElementType'?
    if (toset->getType() != tostore->getType()->getPointerElementType()) {
                                                ^~~~~~~~~~~~~~~~~~~~~
                                                getArrayElementType
/opt/homebrew/opt/llvm/include/llvm/IR/Type.h:405:9: note: 'getArrayElementType' declared here
  Type *getArrayElementType() const {
        ^
/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/enzyme/Enzyme/DiffeGradientUtils.cpp:530:52: error: no member named 'getPointerElementType' in 'llvm::Type'; did you mean 'getArrayElementType'?
    assert(toset->getType() == tostore->getType()->getPointerElementType());
                                                   ^~~~~~~~~~~~~~~~~~~~~
                                                   getArrayElementType
/Library/Developer/CommandLineTools/SDKs/MacOSX13.sdk/usr/include/assert.h:99:25: note: expanded from macro 'assert'
    (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __ASSERT_FILE_NAME, __LINE__, #e) : (void)0)
                        ^
/opt/homebrew/opt/llvm/include/llvm/IR/Type.h:405:9: note: 'getArrayElementType' declared here
  Type *getArrayElementType() const {
        ^
/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/enzyme/Enzyme/DiffeGradientUtils.cpp:575:33: warning: 'supportsTypedPointers' is deprecated: Always returns false [-Wdeprecated-declarations]
  if (metaforfree->getContext().supportsTypedPointers()) {
                                ^
/opt/homebrew/opt/llvm/include/llvm/IR/LLVMContext.h:323:5: note: 'supportsTypedPointers' has been explicitly marked deprecated here
  [[deprecated("Always returns false")]]
    ^
/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/enzyme/Enzyme/DiffeGradientUtils.cpp:577:33: error: no member named 'getPointerElementType' in 'llvm::Type'; did you mean 'getArrayElementType'?
    T = metaforfree->getType()->getPointerElementType();
                                ^~~~~~~~~~~~~~~~~~~~~
                                getArrayElementType
/opt/homebrew/opt/llvm/include/llvm/IR/Type.h:405:9: note: 'getArrayElementType' declared here
  Type *getArrayElementType() const {
        ^
/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/enzyme/Enzyme/DiffeGradientUtils.cpp:646:29: warning: 'supportsTypedPointers' is deprecated: Always returns false [-Wdeprecated-declarations]
  if (origptr->getContext().supportsTypedPointers()) {
                            ^
/opt/homebrew/opt/llvm/include/llvm/IR/LLVMContext.h:323:5: note: 'supportsTypedPointers' has been explicitly marked deprecated here
  [[deprecated("Always returns false")]]
    ^
/tmp/enzyme-20231012-53020-xs8iro/Enzyme-0.0.88/enzyme/Enzyme/DiffeGradientUtils.cpp:648:37: error: no member named 'getPointerElementType' in 'llvm::Type'; did you mean 'getArrayElementType'?
    needsCast = origptr->getType()->getPointerElementType() != addingType;
                                    ^~~~~~~~~~~~~~~~~~~~~
                                    getArrayElementType
/opt/homebrew/opt/llvm/include/llvm/IR/Type.h:405:9: note: 'getArrayElementType' declared here
  Type *getArrayElementType() const {
        ^
1 warning and 2 errors generated.
gmake[2]: *** [Enzyme/CMakeFiles/LLDEnzyme-17.dir/build.make:121: Enzyme/CMakeFiles/LLDEnzyme-17.dir/CacheUtility.cpp.o] Error 1

[wsmoses]

Oh yeah this should be doable now that it's out. We actually have a build succeeding which tracks LLVM head, and I guess we didn't have the >= versions checks all correct for 17.

I'll add 17 to our CI and we can fix this quickly.