From cda572fd596f22cbdd34d4a0b6c9c4ddc36559d9 Mon Sep 17 00:00:00 2001
From: visualfc <visualfc@gmail.com>
Date: Sun, 19 May 2024 19:33:41 +0800
Subject: [PATCH] ssa: builtin copy

---
 cl/_testrt/builtin/in.go          |   5 +++
 cl/_testrt/builtin/out.ll         |  63 ++++++++++++++++++++++++++++++
 internal/runtime/c/c.go           |   3 ++
 internal/runtime/llgo_autogen.lla | Bin 6810 -> 6918 bytes
 internal/runtime/z_slice.go       |  12 ++++++
 ssa/expr.go                       |  15 +++++++
 6 files changed, 98 insertions(+)

diff --git a/cl/_testrt/builtin/in.go b/cl/_testrt/builtin/in.go
index cb936a02..25582553 100644
--- a/cl/_testrt/builtin/in.go
+++ b/cl/_testrt/builtin/in.go
@@ -26,4 +26,9 @@ func main() {
 	println(data)
 	var i any = 100
 	println(true, 100, -100, uint(255), int32(-100), 100.5, i, &i, uintptr(unsafe.Pointer(&i)))
+	var dst [3]byte
+	n := copy(dst[:], data)
+	println(n, dst[0], dst[1], dst[2])
+	n = copy(dst[1:], "ABCD")
+	println(n, dst[0], dst[1], dst[2])
 }
diff --git a/cl/_testrt/builtin/out.ll b/cl/_testrt/builtin/out.ll
index 493d2cb0..2af18d2b 100644
--- a/cl/_testrt/builtin/out.ll
+++ b/cl/_testrt/builtin/out.ll
@@ -55,6 +55,15 @@ source_filename = "main"
 @41 = private unnamed_addr constant [2 x i8] c" \00", align 1
 @42 = private unnamed_addr constant [2 x i8] c" \00", align 1
 @43 = private unnamed_addr constant [2 x i8] c"\0A\00", align 1
+@44 = private unnamed_addr constant [2 x i8] c" \00", align 1
+@45 = private unnamed_addr constant [2 x i8] c" \00", align 1
+@46 = private unnamed_addr constant [2 x i8] c" \00", align 1
+@47 = private unnamed_addr constant [2 x i8] c"\0A\00", align 1
+@48 = private unnamed_addr constant [5 x i8] c"ABCD\00", align 1
+@49 = private unnamed_addr constant [2 x i8] c" \00", align 1
+@50 = private unnamed_addr constant [2 x i8] c" \00", align 1
+@51 = private unnamed_addr constant [2 x i8] c" \00", align 1
+@52 = private unnamed_addr constant [2 x i8] c"\0A\00", align 1
 
 define void @main.init() {
 _llgo_0:
@@ -310,6 +319,58 @@ _llgo_0:
   call void @"github.com/goplus/llgo/internal/runtime.PrintUint"(i64 %126)
   %135 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewString"(ptr @43, i64 1)
   call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %135)
+  %136 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 3)
+  %137 = call %"github.com/goplus/llgo/internal/runtime.Slice" @"github.com/goplus/llgo/internal/runtime.NewSlice3"(ptr %136, i64 1, i64 3, i64 0, i64 3, i64 3)
+  %138 = extractvalue %"github.com/goplus/llgo/internal/runtime.Slice" %120, 0
+  %139 = extractvalue %"github.com/goplus/llgo/internal/runtime.Slice" %120, 1
+  %140 = call i64 @"github.com/goplus/llgo/internal/runtime.SliceCopy"(%"github.com/goplus/llgo/internal/runtime.Slice" %137, ptr %138, i64 %139, i64 1)
+  %141 = getelementptr inbounds i8, ptr %136, i64 0
+  %142 = load i8, ptr %141, align 1
+  %143 = getelementptr inbounds i8, ptr %136, i64 1
+  %144 = load i8, ptr %143, align 1
+  %145 = getelementptr inbounds i8, ptr %136, i64 2
+  %146 = load i8, ptr %145, align 1
+  call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %140)
+  %147 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewString"(ptr @44, i64 1)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %147)
+  %148 = zext i8 %142 to i64
+  call void @"github.com/goplus/llgo/internal/runtime.PrintUint"(i64 %148)
+  %149 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewString"(ptr @45, i64 1)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %149)
+  %150 = zext i8 %144 to i64
+  call void @"github.com/goplus/llgo/internal/runtime.PrintUint"(i64 %150)
+  %151 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewString"(ptr @46, i64 1)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %151)
+  %152 = zext i8 %146 to i64
+  call void @"github.com/goplus/llgo/internal/runtime.PrintUint"(i64 %152)
+  %153 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewString"(ptr @47, i64 1)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %153)
+  %154 = call %"github.com/goplus/llgo/internal/runtime.Slice" @"github.com/goplus/llgo/internal/runtime.NewSlice3"(ptr %136, i64 1, i64 3, i64 1, i64 3, i64 3)
+  %155 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewString"(ptr @48, i64 4)
+  %156 = extractvalue %"github.com/goplus/llgo/internal/runtime.String" %155, 0
+  %157 = extractvalue %"github.com/goplus/llgo/internal/runtime.String" %155, 1
+  %158 = call i64 @"github.com/goplus/llgo/internal/runtime.SliceCopy"(%"github.com/goplus/llgo/internal/runtime.Slice" %154, ptr %156, i64 %157, i64 1)
+  %159 = getelementptr inbounds i8, ptr %136, i64 0
+  %160 = load i8, ptr %159, align 1
+  %161 = getelementptr inbounds i8, ptr %136, i64 1
+  %162 = load i8, ptr %161, align 1
+  %163 = getelementptr inbounds i8, ptr %136, i64 2
+  %164 = load i8, ptr %163, align 1
+  call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %158)
+  %165 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewString"(ptr @49, i64 1)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %165)
+  %166 = zext i8 %160 to i64
+  call void @"github.com/goplus/llgo/internal/runtime.PrintUint"(i64 %166)
+  %167 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewString"(ptr @50, i64 1)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %167)
+  %168 = zext i8 %162 to i64
+  call void @"github.com/goplus/llgo/internal/runtime.PrintUint"(i64 %168)
+  %169 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewString"(ptr @51, i64 1)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %169)
+  %170 = zext i8 %164 to i64
+  call void @"github.com/goplus/llgo/internal/runtime.PrintUint"(i64 %170)
+  %171 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewString"(ptr @52, i64 1)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %171)
   ret i32 0
 }
 
@@ -344,3 +405,5 @@ declare void @"github.com/goplus/llgo/internal/runtime.PrintFloat"(double)
 declare void @"github.com/goplus/llgo/internal/runtime.PrintIface"(%"github.com/goplus/llgo/internal/runtime.iface")
 
 declare void @"github.com/goplus/llgo/internal/runtime.PrintPointer"(ptr)
+
+declare i64 @"github.com/goplus/llgo/internal/runtime.SliceCopy"(%"github.com/goplus/llgo/internal/runtime.Slice", ptr, i64, i64)
diff --git a/internal/runtime/c/c.go b/internal/runtime/c/c.go
index ac88b11a..c26c8748 100644
--- a/internal/runtime/c/c.go
+++ b/internal/runtime/c/c.go
@@ -63,6 +63,9 @@ func Malloc(size uintptr) Pointer
 //go:linkname Memcpy C.memcpy
 func Memcpy(dst, src Pointer, n uintptr) Pointer
 
+//go:linkname Memmove C.memmove
+func Memmove(dst, src Pointer, n uintptr) Pointer
+
 //go:linkname Memset C.memset
 func Memset(s Pointer, c Int, n uintptr) Pointer
 
diff --git a/internal/runtime/llgo_autogen.lla b/internal/runtime/llgo_autogen.lla
index fe0aad96088e82ff5316f40108e1ada92fd9ab77..6257d02dcf6df798f320d4ec2621762c94edb2e5 100644
GIT binary patch
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diff --git a/internal/runtime/z_slice.go b/internal/runtime/z_slice.go
index e6f9845c..444d2b45 100644
--- a/internal/runtime/z_slice.go
+++ b/internal/runtime/z_slice.go
@@ -91,4 +91,16 @@ func SliceAppend(src Slice, data unsafe.Pointer, num, etSize int) Slice {
 	return src
 }
 
+// SliceCopy copy data to slice and returns a slice.
+func SliceCopy(dst Slice, data unsafe.Pointer, num int, etSize int) int {
+	n := dst.len
+	if n > num {
+		n = num
+	}
+	if n > 0 {
+		c.Memmove(dst.data, data, uintptr(n*etSize))
+	}
+	return n
+}
+
 // -----------------------------------------------------------------------------
diff --git a/ssa/expr.go b/ssa/expr.go
index 0ff74112..722060a7 100644
--- a/ssa/expr.go
+++ b/ssa/expr.go
@@ -1022,6 +1022,21 @@ func (b Builder) BuiltinCall(fn string, args ...Expr) (ret Expr) {
 			b.InlineCall(b.Pkg.rtFunc("PrintString"), b.Str("\n"))
 		}
 		return
+	case "copy":
+		if len(args) == 2 {
+			dst := args[0]
+			if dst.kind == vkSlice {
+				src := args[1]
+				prog := b.Prog
+				etSize := prog.Val(int(prog.SizeOf(prog.Elem(dst.Type))))
+				switch src.kind {
+				case vkSlice:
+					return b.InlineCall(b.Pkg.rtFunc("SliceCopy"), dst, b.SliceData(src), b.SliceLen(src), etSize)
+				case vkString:
+					return b.InlineCall(b.Pkg.rtFunc("SliceCopy"), dst, b.StringData(src), b.StringLen(src), etSize)
+				}
+			}
+		}
 	}
 	panic("todo")
 }