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core/intrinsics: Add mem_zero_volatile

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Yawning Angel
2021-10-31 21:37:22 +00:00
parent ff36bd3d85
commit 796a0c3968
5 changed files with 19 additions and 4 deletions
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core/intrinsics/intrinsics.odin
+1
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@@ -39,6 +39,7 @@ sqrt :: proc(x: $T) -> T where type_is_float(T) ---
mem_copy :: proc(dst, src: rawptr, len: int) ---
mem_copy_non_overlapping :: proc(dst, src: rawptr, len: int) ---
mem_zero :: proc(ptr: rawptr, len: int) ---
mem_zero_volatile :: proc(ptr: rawptr, len: int) ---
fixed_point_mul :: proc(lhs, rhs: $T, #const scale: uint) -> T where type_is_integer(T) ---
src/check_builtin.cpp
+1
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@@ -2598,6 +2598,7 @@ bool check_builtin_procedure(CheckerContext *c, Operand *operand, Ast *call, i32
break;
case BuiltinProc_mem_zero:
case BuiltinProc_mem_zero_volatile:
{
operand->mode = Addressing_NoValue;
operand->type = t_invalid;
src/checker_builtin_procs.hpp
+2
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@@ -70,6 +70,7 @@ enum BuiltinProcId {
BuiltinProc_mem_copy,
BuiltinProc_mem_copy_non_overlapping,
BuiltinProc_mem_zero,
BuiltinProc_mem_zero_volatile,
BuiltinProc_ptr_offset,
BuiltinProc_ptr_sub,
@@ -322,6 +323,7 @@ gb_global BuiltinProc builtin_procs[BuiltinProc_COUNT] = {
{STR_LIT("mem_copy"), 3, false, Expr_Stmt, BuiltinProcPkg_intrinsics},
{STR_LIT("mem_copy_non_overlapping"), 3, false, Expr_Stmt, BuiltinProcPkg_intrinsics},
{STR_LIT("mem_zero"), 2, false, Expr_Stmt, BuiltinProcPkg_intrinsics},
{STR_LIT("mem_zero_volatile"), 2, false, Expr_Stmt, BuiltinProcPkg_intrinsics},
{STR_LIT("ptr_offset"), 2, false, Expr_Expr, BuiltinProcPkg_intrinsics},
{STR_LIT("ptr_sub"), 2, false, Expr_Expr, BuiltinProcPkg_intrinsics},
src/llvm_backend_proc.cpp
+12 -1
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@@ -1560,7 +1560,18 @@ lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValue const &tv,
len = lb_emit_conv(p, len, t_int);
unsigned alignment = 1;
lb_mem_zero_ptr_internal(p, ptr.value, len.value, alignment);
lb_mem_zero_ptr_internal(p, ptr.value, len.value, alignment, false);
return {};
}
case BuiltinProc_mem_zero_volatile:
{
lbValue ptr = lb_build_expr(p, ce->args[0]);
lbValue len = lb_build_expr(p, ce->args[1]);
ptr = lb_emit_conv(p, ptr, t_rawptr);
len = lb_emit_conv(p, len, t_int);
unsigned alignment = 1;
lb_mem_zero_ptr_internal(p, ptr.value, len.value, alignment, true);
return {};
}
src/llvm_backend_utility.cpp
+3 -3
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@@ -48,7 +48,7 @@ lbValue lb_correct_endianness(lbProcedure *p, lbValue value) {
return value;
}
void lb_mem_zero_ptr_internal(lbProcedure *p, LLVMValueRef ptr, LLVMValueRef len, unsigned alignment) {
void lb_mem_zero_ptr_internal(lbProcedure *p, LLVMValueRef ptr, LLVMValueRef len, unsigned alignment, bool is_volatile) {
bool is_inlinable = false;
i64 const_len = 0;
@@ -77,7 +77,7 @@ void lb_mem_zero_ptr_internal(lbProcedure *p, LLVMValueRef ptr, LLVMValueRef len
args[0] = LLVMBuildPointerCast(p->builder, ptr, types[0], "");
args[1] = LLVMConstInt(LLVMInt8TypeInContext(p->module->ctx), 0, false);
args[2] = LLVMBuildIntCast2(p->builder, len, types[1], /*signed*/false, "");
args[3] = LLVMConstInt(LLVMInt1TypeInContext(p->module->ctx), 0, false); // is_volatile parameter
args[3] = LLVMConstInt(LLVMInt1TypeInContext(p->module->ctx), is_volatile, false);
LLVMBuildCall(p->builder, ip, args, gb_count_of(args), "");
}
@@ -93,7 +93,7 @@ void lb_mem_zero_ptr(lbProcedure *p, LLVMValueRef ptr, Type *type, unsigned alig
{
// NOTE(bill): Enforce zeroing through memset to make sure padding is zeroed too
i32 sz = cast(i32)type_size_of(type);
lb_mem_zero_ptr_internal(p, ptr, lb_const_int(p->module, t_int, sz).value, alignment);
lb_mem_zero_ptr_internal(p, ptr, lb_const_int(p->module, t_int, sz).value, alignment, false);
}
break;
default: