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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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compiler/symbol.go
+17 -24
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@@ -96,7 +96,7 @@ func (c *compilerContext) getFunction(fn *ssa.Function) (llvm.Type, llvm.Value)
// Add an extra parameter as the function context. This context is used in
// closures and bound methods, but should be optimized away when not used.
if !info.exported {
paramInfos = append(paramInfos, paramInfo{llvmType: c.i8ptrType, name: "context", elemSize: 0})
paramInfos = append(paramInfos, paramInfo{llvmType: c.dataPtrType, name: "context", elemSize: 0})
}
var paramTypes []llvm.Type
@@ -145,20 +145,18 @@ func (c *compilerContext) getFunction(fn *ssa.Function) (llvm.Type, llvm.Value)
for _, attrName := range []string{"noalias", "nonnull"} {
llvmFn.AddAttributeAtIndex(0, c.ctx.CreateEnumAttribute(llvm.AttributeKindID(attrName), 0))
}
if llvmutil.Major() >= 15 { // allockind etc are not available in LLVM 14
// Add attributes to signal to LLVM that this is an allocator
// function. This enables a number of optimizations.
llvmFn.AddFunctionAttr(c.ctx.CreateEnumAttribute(llvm.AttributeKindID("allockind"), allocKindAlloc|allocKindZeroed))
llvmFn.AddFunctionAttr(c.ctx.CreateStringAttribute("alloc-family", "runtime.alloc"))
// Use a special value to indicate the first parameter:
// > allocsize has two integer arguments, but because they're both 32 bits, we can
// > pack them into one 64-bit value, at the cost of making said value
// > nonsensical.
// >
// > In order to do this, we need to reserve one value of the second (optional)
// > allocsize argument to signify "not present."
llvmFn.AddFunctionAttr(c.ctx.CreateEnumAttribute(llvm.AttributeKindID("allocsize"), 0x0000_0000_ffff_ffff))
}
// Add attributes to signal to LLVM that this is an allocator function.
// This enables a number of optimizations.
llvmFn.AddFunctionAttr(c.ctx.CreateEnumAttribute(llvm.AttributeKindID("allockind"), allocKindAlloc|allocKindZeroed))
llvmFn.AddFunctionAttr(c.ctx.CreateStringAttribute("alloc-family", "runtime.alloc"))
// Use a special value to indicate the first parameter:
// > allocsize has two integer arguments, but because they're both 32 bits, we can
// > pack them into one 64-bit value, at the cost of making said value
// > nonsensical.
// >
// > In order to do this, we need to reserve one value of the second (optional)
// > allocsize argument to signify "not present."
llvmFn.AddFunctionAttr(c.ctx.CreateEnumAttribute(llvm.AttributeKindID("allocsize"), 0x0000_0000_ffff_ffff))
case "runtime.sliceAppend":
// Appending a slice will only read the to-be-appended slice, it won't
// be modified.
@@ -445,15 +443,10 @@ func (c *compilerContext) addStandardDefinedAttributes(llvmFn llvm.Value) {
llvmFn.AddFunctionAttr(c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nounwind"), 0))
if strings.Split(c.Triple, "-")[0] == "x86_64" {
// Required by the ABI.
if llvmutil.Major() < 15 {
// Needed for LLVM 14 support.
llvmFn.AddFunctionAttr(c.ctx.CreateEnumAttribute(llvm.AttributeKindID("uwtable"), 0))
} else {
// The uwtable has two possible values: sync (1) or async (2). We
// use sync because we currently don't use async unwind tables.
// For details, see: https://llvm.org/docs/LangRef.html#function-attributes
llvmFn.AddFunctionAttr(c.ctx.CreateEnumAttribute(llvm.AttributeKindID("uwtable"), 1))
}
// The uwtable has two possible values: sync (1) or async (2). We use
// sync because we currently don't use async unwind tables.
// For details, see: https://llvm.org/docs/LangRef.html#function-attributes
llvmFn.AddFunctionAttr(c.ctx.CreateEnumAttribute(llvm.AttributeKindID("uwtable"), 1))
}
}