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all: remove LLVM 14 support

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This is a big change: apart from removing LLVM 14 it also removes typed
pointer support (which was only fully supported in LLVM up to version
14). This removes about 200 lines of code, but more importantly removes
a ton of special cases for LLVM 14.
This commit is contained in:
Ayke van Laethem
2023-09-18 17:54:29 +02:00
committed by Ayke
parent c9721197d5
commit 1da1abe314
33 changed files with 247 additions and 467 deletions
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transform/allocs.go
+4 -5
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@@ -37,7 +37,7 @@ func OptimizeAllocs(mod llvm.Module, printAllocs *regexp.Regexp, logger func(tok
targetData := llvm.NewTargetData(mod.DataLayout())
defer targetData.Dispose()
i8ptrType := llvm.PointerType(mod.Context().Int8Type(), 0)
ptrType := llvm.PointerType(mod.Context().Int8Type(), 0)
builder := mod.Context().NewBuilder()
defer builder.Dispose()
@@ -110,7 +110,7 @@ func OptimizeAllocs(mod llvm.Module, printAllocs *regexp.Regexp, logger func(tok
} else {
alignment = 8
}
if pointerAlignment := targetData.ABITypeAlignment(i8ptrType); pointerAlignment < alignment {
if pointerAlignment := targetData.ABITypeAlignment(ptrType); pointerAlignment < alignment {
// Use min(alignment, alignof(void*)) as the alignment.
alignment = pointerAlignment
}
@@ -120,7 +120,7 @@ func OptimizeAllocs(mod llvm.Module, printAllocs *regexp.Regexp, logger func(tok
fn := bitcast.InstructionParent().Parent()
builder.SetInsertPointBefore(fn.EntryBasicBlock().FirstInstruction())
allocaType := llvm.ArrayType(mod.Context().Int8Type(), int(size))
alloca := builder.CreateAlloca(allocaType, "stackalloc.alloca")
alloca := builder.CreateAlloca(allocaType, "stackalloc")
alloca.SetAlignment(alignment)
// Zero the allocation inside the block where the value was originally allocated.
@@ -130,8 +130,7 @@ func OptimizeAllocs(mod llvm.Module, printAllocs *regexp.Regexp, logger func(tok
store.SetAlignment(alignment)
// Replace heap alloc bitcast with stack alloc bitcast.
stackalloc := builder.CreateBitCast(alloca, bitcast.Type(), "stackalloc")
bitcast.ReplaceAllUsesWith(stackalloc)
bitcast.ReplaceAllUsesWith(alloca)
if heapalloc != bitcast {
bitcast.EraseFromParentAsInstruction()
}