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factor out alloca generation into a helper

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This commit is contained in:
Henry Dooley
2021-12-25 16:27:52 -06:00
parent 6f370fdbf2
commit 516065d7c2
3 changed files with 16 additions and 10 deletions
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2
src/llvm_backend.hpp
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@@ -459,6 +459,8 @@ void lb_set_entity_from_other_modules_linkage_correctly(lbModule *other_module,
lbValue lb_expr_untyped_const_to_typed(lbModule *m, Ast *expr, Type *t);
bool lb_is_expr_untyped_const(Ast *expr);
LLVMValueRef llvm_alloca(lbProcedure *p, LLVMTypeRef llvm_type, isize alignment);
void lb_mem_zero_ptr(lbProcedure *p, LLVMValueRef ptr, Type *type, unsigned alignment);
void lb_emit_init_context(lbProcedure *p, lbAddr addr);

6
src/llvm_backend_const.cpp
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@@ -413,9 +413,9 @@ lbValue lb_const_value(lbModule *m, Type *type, ExactValue value, bool allow_loc
LLVMPositionBuilderAtEnd(p->builder, p->decl_block->block);
LLVMTypeRef llvm_type = lb_type(m, t);
array_data = LLVMBuildAlloca(p->builder, llvm_type, "");
LLVMSetAlignment(array_data, 16); // TODO(bill): Make this configurable
LLVMPositionBuilderAtEnd(p->builder, p->curr_block->block);
array_data = llvm_alloca(p, llvm_type, 16);
LLVMBuildStore(p->builder, backing_array.value, array_data);
{

18
src/llvm_backend_general.cpp
View File

@@ -216,6 +216,14 @@ LLVMValueRef llvm_one(lbModule *m) {
return LLVMConstInt(lb_type(m, t_i32), 1, false);
}
LLVMValueRef llvm_alloca(lbProcedure *p, LLVMTypeRef llvm_type, isize alignment) {
LLVMValueRef val = LLVMBuildAlloca(p->builder, llvm_type, "");
LLVMSetAlignment(val, alignment);
LLVMPositionBuilderAtEnd(p->builder, p->curr_block->block);
return val;
}
lbValue lb_zero(lbModule *m, Type *t) {
lbValue v = {};
v.value = LLVMConstInt(lb_type(m, t), 0, false);
@@ -2267,11 +2275,10 @@ general_end:;
GB_ASSERT(p->decl_block != p->curr_block);
LLVMPositionBuilderAtEnd(p->builder, p->decl_block->block);
LLVMValueRef ptr = LLVMBuildAlloca(p->builder, dst_type, "");
LLVMPositionBuilderAtEnd(p->builder, p->curr_block->block);
i64 max_align = gb_max(lb_alignof(src_type), lb_alignof(dst_type));
max_align = gb_max(max_align, 4);
LLVMSetAlignment(ptr, cast(unsigned)max_align);
LLVMValueRef ptr = llvm_alloca(p, dst_type, max_align);
LLVMValueRef nptr = LLVMBuildPointerCast(p->builder, ptr, LLVMPointerType(src_type, 0), "");
LLVMBuildStore(p->builder, val, nptr);
@@ -2642,16 +2649,13 @@ lbAddr lb_add_local(lbProcedure *p, Type *type, Entity *e, bool zero_init, i32 p
}
LLVMTypeRef llvm_type = lb_type(p->module, type);
LLVMValueRef ptr = LLVMBuildAlloca(p->builder, llvm_type, name);
unsigned alignment = cast(unsigned)gb_max(type_align_of(type), lb_alignof(llvm_type));
if (is_type_matrix(type)) {
alignment *= 2; // NOTE(bill): Just in case
}
LLVMSetAlignment(ptr, alignment);
LLVMPositionBuilderAtEnd(p->builder, p->curr_block->block);
LLVMValueRef ptr = llvm_alloca(p, llvm_type, alignment);
if (!zero_init && !force_no_init) {
// If there is any padding of any kind, just zero init regardless of zero_init parameter