From 7b0d23f91ff18cb022f5107a7c4527e4809c9a49 Mon Sep 17 00:00:00 2001
From: xushiwei <x@goplus.org>
Date: Sat, 15 Jun 2024 08:21:27 +0800
Subject: [PATCH] internal/abi.Map: IndirectKey/IndirectElem

---
 c/c.go               |  5 ++++-
 internal/abi/type.go | 18 ++++++++++++++++++
 py/README.md         |  4 ++--
 3 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/c/c.go b/c/c.go
index 4c5f4e13..a38958ed 100644
--- a/c/c.go
+++ b/c/c.go
@@ -46,7 +46,7 @@ type integer interface {
 func Str(string) *Char
 
 // llgo:link Advance llgo.advance
-func Advance[PtrT any](ptr PtrT, offset int) PtrT { return ptr }
+func Advance[PtrT any, I integer](ptr PtrT, offset I) PtrT { return ptr }
 
 // llgo:link Index llgo.index
 func Index[T any, I integer](ptr *T, offset I) T { return *ptr }
@@ -66,6 +66,9 @@ func Free(ptr 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/abi/type.go b/internal/abi/type.go
index c3f0f9ed..3e7250b9 100644
--- a/internal/abi/type.go
+++ b/internal/abi/type.go
@@ -170,6 +170,24 @@ type MapType struct {
 	Flags      uint32
 }
 
+// Note: flag values must match those used in the TMAP case
+// in ../cmd/compile/internal/reflectdata/reflect.go:writeType.
+func (mt *MapType) IndirectKey() bool { // store ptr to key instead of key itself
+	return mt.Flags&1 != 0
+}
+func (mt *MapType) IndirectElem() bool { // store ptr to elem instead of elem itself
+	return mt.Flags&2 != 0
+}
+func (mt *MapType) ReflexiveKey() bool { // true if k==k for all keys
+	return mt.Flags&4 != 0
+}
+func (mt *MapType) NeedKeyUpdate() bool { // true if we need to update key on an overwrite
+	return mt.Flags&8 != 0
+}
+func (mt *MapType) HashMightPanic() bool { // true if hash function might panic
+	return mt.Flags&16 != 0
+}
+
 type PtrType struct {
 	Type
 	Elem *Type // pointer element (pointed at) type
diff --git a/py/README.md b/py/README.md
index 16d3bbc3..32479857 100644
--- a/py/README.md
+++ b/py/README.md
@@ -19,10 +19,10 @@ To run the demos in directory `_demo`, you need to set the `LLGO_LIB_PYTHON` env
 export LLGO_LIB_PYTHON=/foo/bar/python3.12
 ```
 
-For example, `/opt/homebrew/Frameworks/Python.framework/Versions/3.12/libpython3.12.dylib` is a typical python lib location under macOS. So we should set it like this:
+For example, `/opt/homebrew/Frameworks/Python.framework/Versions/3.12/lib/libpython3.12.dylib` is a typical python lib location under macOS. So we should set it like this:
 
 ```sh
-export LLGO_LIB_PYTHON=/opt/homebrew/Frameworks/Python.framework/Versions/3.12/python3.12
+export LLGO_LIB_PYTHON=/opt/homebrew/Frameworks/Python.framework/Versions/3.12/lib/python3.12
 ```
 
 Then you can run the demos in directory `_demo`: