Fix --spill-pointers #6294
Fix --spill-pointers #6294
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This fixes --spill-pointers.
src/abi/stack.h
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| WASM_UNREACHABLE("unhandled pointerType"); | ||
| } | ||
| block->list.push_back(builder.makeGlobalSet(stackPointer->name, added)); | ||
| block->list.push_back(builder.makeLocalSet(local, added)); |
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This is the cause of the error on CI, I think - the added node is reused here, but each node is only allowed to appear once in the IR.
The sub operation could be stored in another local but maybe there is a nicer way.
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This is the cause of the error on CI, I think - the
addednode is reused here, but each node is only allowed to appear once in the IR.
i didn't know that. thank you. fixed.
The sub operation could be stored in another local but maybe there is a nicer way.
i guess it can be something like:
global.get $sp
i32.const xxx
i32.sub
local.tee yyy
global.set $sp
but i'm not sure how it can be done with binaryen IR builder API.
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You can use builder.makeLocalTee to replace the makeLocalSet/Get pair here. That is, something like makeGlobalSet(makeLocalTee(..)).
The LLVM wasm backend grows the stack downwards, and this pass did not fully account for that before.
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