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[backend]引入了栈上的20字节安全区

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Lixuanwang
2025-07-22 21:36:22 +08:00
parent 20a5c5cbfb
commit b20bda2f52
1 changed files with 2 additions and 1 deletions
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src/RISCv64RegAlloc.cpp
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@@ -27,7 +27,8 @@ void RISCv64RegAlloc::run() {
void RISCv64RegAlloc::eliminateFrameIndices() { void RISCv64RegAlloc::eliminateFrameIndices() {
StackFrameInfo& frame_info = MFunc->getFrameInfo(); StackFrameInfo& frame_info = MFunc->getFrameInfo();
int current_offset = 0; int current_offset = 20; // 这里写20是为了在$s0和第一个变量之间留出20字节的安全区，
// 以防止一些函数调用方面的恶性bug。
Function* F = MFunc->getFunc(); Function* F = MFunc->getFunc();
RISCv64ISel* isel = MFunc->getISel(); RISCv64ISel* isel = MFunc->getISel();