From 01dc0d5a7222470939d3eb96b1d14c27b70161ad Mon Sep 17 00:00:00 2001
From: cheme <emericchevalier.pro@gmail.com>
Date: Sun, 21 Jul 2024 07:28:22 +0000
Subject: [PATCH] Riscv32e align stack to 4 bytes (#20673)

---
 lib/std/Target.zig   | 3 ++-
 src/codegen/llvm.zig | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/std/Target.zig b/lib/std/Target.zig
index d78ceb3f12..1bf608ffb1 100644
--- a/lib/std/Target.zig
+++ b/lib/std/Target.zig
@@ -1967,7 +1967,6 @@ pub fn stackAlignment(target: Target) u16 {
         .bpfel,
         .mips64,
         .mips64el,
-        .riscv32,
         .riscv64,
         .sparc64,
         .x86_64,
@@ -1976,6 +1975,8 @@ pub fn stackAlignment(target: Target) u16 {
         .wasm64,
         .loongarch64,
         => 16,
+        .riscv32,
+        => if (Target.riscv.featureSetHas(target.cpu.features, .e)) 4 else 16,
         .powerpc64,
         .powerpc64le,
         => switch (target.os.tag) {
diff --git a/src/codegen/llvm.zig b/src/codegen/llvm.zig
index 48bf335311..f3898247f3 100644
--- a/src/codegen/llvm.zig
+++ b/src/codegen/llvm.zig
@@ -542,7 +542,8 @@ const DataLayoutBuilder = struct {
             try self.typeAlignment(.float, 64, 64, 64, true, writer);
         }
         if (stack_abi != ptr_bit_width or self.target.cpu.arch == .msp430 or
-            self.target.os.tag == .uefi or self.target.os.tag == .windows)
+            self.target.os.tag == .uefi or self.target.os.tag == .windows or
+            self.target.cpu.arch == .riscv32)
             try writer.print("-S{d}", .{stack_abi});
         switch (self.target.cpu.arch) {
             .hexagon, .ve => {