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transform: fix poison value in heap-to-stack transform

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In https://github.com/tinygo-org/tinygo/issues/2777, a poison value
ended up in `runtime.alloc`. This shouldn't happen, especially not for
well written code. So I'm not sure why it happens. But here is a fix
anyway.
This commit is contained in:
Ayke van Laethem
2022-04-14 22:30:41 +02:00
committed by Ron Evans
parent 2dc46a851b
commit ef3b3c0d6a
1 changed files with 1 additions and 1 deletions
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transform/allocs.go
+1 -1
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@@ -41,7 +41,7 @@ func OptimizeAllocs(mod llvm.Module, printAllocs *regexp.Regexp, logger func(tok
for _, heapalloc := range getUses(allocator) { for _, heapalloc := range getUses(allocator) {
logAllocs := printAllocs != nil && printAllocs.MatchString(heapalloc.InstructionParent().Parent().Name()) logAllocs := printAllocs != nil && printAllocs.MatchString(heapalloc.InstructionParent().Parent().Name())
if heapalloc.Operand(0).IsAConstant().IsNil() { if heapalloc.Operand(0).IsAConstantInt().IsNil() {
// Do not allocate variable length arrays on the stack. // Do not allocate variable length arrays on the stack.
if logAllocs { if logAllocs {
logAlloc(logger, heapalloc, "size is not constant") logAlloc(logger, heapalloc, "size is not constant")