Commit 47a4d43e41b07b939b840fbf8230b89e27694093 | zig

author	Timon Kruiper <timonkruiper@gmail.com> 2020-12-29 20:18:17+01:00
committer	Timon Kruiper <timonkruiper@gmail.com> 2021-01-03 17:23:30+01:00
log	47a4d43e41b07b939b840fbf8230b89e27694093
tree	2699734285adc39084e664da773e997e672e422d
parent	19cfd310b0d5ba7d9542d50db281035b15daad35

stage2: Add code generation for Load instruction in LLVM backend

The following now works:
```
export fn _start() noreturn {
    var x: bool = true;
    var y: bool = x;
    exit();
}

fn exit() noreturn {
    unreachable;
}
```

2 files changed, 9 insertions(+), 0 deletions(-)

src
- llvm_backend.zig
- llvm_bindings.zig

src/llvm_backend.zig+6

 @@ -312,6 +312,7 @@ pub const LLVMIRModule = struct {
                         .arg => try self.genArg(inst.castTag(.arg).?),
                         .alloc => try self.genAlloc(inst.castTag(.alloc).?),
                         .store => try self.genStore(inst.castTag(.store).?),
+                        .load => try self.genLoad(inst.castTag(.load).?),
                         .dbg_stmt => blk: {
                             // TODO: implement debug info
                             break :blk null;
 @@ -396,6 +397,11 @@ pub const LLVMIRModule = struct {
         return null;
     }
+    fn genLoad(self: *LLVMIRModule, inst: *Inst.UnOp) !?*const llvm.ValueRef {
+        const ptr_val = try self.resolveInst(inst.operand);
+        return self.builder.buildLoad(ptr_val, "");
+    }
     fn genBreakpoint(self: *LLVMIRModule, inst: *Inst.NoOp) !?*const llvm.ValueRef {
         // TODO: Store this function somewhere such that we dont have to add it again
         const fn_type = llvm.TypeRef.functionType(llvm.voidType(), null, 0, false);

src/llvm_bindings.zig+3

...	@@ -125,6 +125,9 @@ pub const BuilderRef = opaque {	...	@@ -125,6 +125,9 @@ pub const BuilderRef = opaque {
125		125
126	pub const buildStore = LLVMBuildStore;	126	pub const buildStore = LLVMBuildStore;
127	extern fn LLVMBuildStore(const BuilderRef, Val: const ValueRef, Ptr: const ValueRef) const ValueRef;	127	extern fn LLVMBuildStore(const BuilderRef, Val: const ValueRef, Ptr: const ValueRef) const ValueRef;
		128
		129	pub const buildLoad = LLVMBuildLoad;
		130	extern fn LLVMBuildLoad(const BuilderRef, PointerVal: const ValueRef, Name: [:0]const u8) const ValueRef;
128	};	131	};
129		132
130	pub const BasicBlockRef = opaque {	133	pub const BasicBlockRef = opaque {