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| author | Jaden Weiss <[email protected]> | 2019-11-13 10:05:01 -0500 |
|---|---|---|
| committer | Ayke <[email protected]> | 2019-11-13 16:45:09 +0100 |
| commit | 93961f9d411d28c7acae5f556ffdabc4b3b6871e (patch) | |
| tree | 49dfc743a91463b32b7c38dc2ac8efb38e3dca9b /transform/allocs.go | |
| parent | acdaaa17d8232989d310292a512e70fccdb288a5 (diff) | |
| download | tinygo-93961f9d411d28c7acae5f556ffdabc4b3b6871e.tar.gz tinygo-93961f9d411d28c7acae5f556ffdabc4b3b6871e.zip | |
fix incorrect starting value for optimized allocations in a loop
Diffstat (limited to 'transform/allocs.go')
| -rw-r--r-- | transform/allocs.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/transform/allocs.go b/transform/allocs.go index 4f006c3a9..f21dde123 100644 --- a/transform/allocs.go +++ b/transform/allocs.go @@ -69,8 +69,13 @@ func OptimizeAllocs(mod llvm.Module) { sizeInWords := (size + uint64(alignment) - 1) / uint64(alignment) allocaType := llvm.ArrayType(mod.Context().IntType(alignment*8), int(sizeInWords)) alloca := builder.CreateAlloca(allocaType, "stackalloc.alloca") + + // Zero the allocation inside the block where the value was originally allocated. zero := llvm.ConstNull(alloca.Type().ElementType()) + builder.SetInsertPointBefore(bitcast) builder.CreateStore(zero, alloca) + + // Replace heap alloc bitcast with stack alloc bitcast. stackalloc := builder.CreateBitCast(alloca, bitcast.Type(), "stackalloc") bitcast.ReplaceAllUsesWith(stackalloc) if heapalloc != bitcast { |