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windows: alignstack=16 on every function

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See #302
This commit is contained in:
Andrew Kelley
2017-10-02 09:55:18 -04:00
parent 0a4283b38b
commit ec40542c44
3 changed files with 29 additions and 6 deletions
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19
src/codegen.cpp
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@@ -290,6 +290,15 @@ static void addLLVMAttrStr(LLVMValueRef val, LLVMAttributeIndex attr_index,
LLVMAddAttributeAtIndex(val, attr_index, llvm_attr);
}
static void addLLVMAttrInt(LLVMValueRef val, LLVMAttributeIndex attr_index,
const char *attr_name, uint64_t attr_val)
{
unsigned kind_id = LLVMGetEnumAttributeKindForName(attr_name, strlen(attr_name));
assert(kind_id != 0);
LLVMAttributeRef llvm_attr = LLVMCreateEnumAttribute(LLVMGetGlobalContext(), kind_id, attr_val);
LLVMAddAttributeAtIndex(val, attr_index, llvm_attr);
}
static void addLLVMFnAttr(LLVMValueRef fn_val, const char *attr_name) {
return addLLVMAttr(fn_val, -1, attr_name);
}
@@ -298,6 +307,10 @@ static void addLLVMFnAttrStr(LLVMValueRef fn_val, const char *attr_name, const c
return addLLVMAttrStr(fn_val, -1, attr_name, attr_val);
}
static void addLLVMFnAttrInt(LLVMValueRef fn_val, const char *attr_name, uint64_t attr_val) {
return addLLVMAttrInt(fn_val, -1, attr_name, attr_val);
}
static void addLLVMArgAttr(LLVMValueRef arg_val, unsigned param_index, const char *attr_name) {
return addLLVMAttr(arg_val, param_index + 1, attr_name);
}
@@ -439,6 +452,12 @@ static LLVMValueRef fn_llvm_value(CodeGen *g, FnTableEntry *fn_table_entry) {
}
}
if (g->zig_target.os == ZigLLVM_Win32 && g->zig_target.arch.arch == ZigLLVM_x86_64 &&
fn_type->data.fn.fn_type_id.cc != CallingConventionNaked)
{
addLLVMFnAttrInt(fn_table_entry->llvm_value, "alignstack", 16);
}
addLLVMFnAttr(fn_table_entry->llvm_value, "nounwind");
addLLVMFnAttr(fn_table_entry->llvm_value, "nobuiltin");
if (g->build_mode == BuildModeDebug && fn_table_entry->fn_inline != FnInlineAlways) {