From 179f1f339c867643cee63ddbf3b35d799c7cdfa8 Mon Sep 17 00:00:00 2001
From: Walter Bright <WalterBright@users.noreply.github.com>
Date: Thu, 11 Jul 2024 20:20:47 -0700
Subject: [PATCH] make localsize a parameter (#16681)

---
 compiler/src/dmd/backend/pdata.d     | 16 +++++++++-------
 compiler/src/dmd/backend/x86/cgcod.d |  4 ++--
 2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/compiler/src/dmd/backend/pdata.d b/compiler/src/dmd/backend/pdata.d
index a7031d4ef6db..5f9f0749812e 100644
--- a/compiler/src/dmd/backend/pdata.d
+++ b/compiler/src/dmd/backend/pdata.d
@@ -53,9 +53,10 @@ enum ALLOCA_LIMIT = 0x10000;
  *
  * Params:
  *      sf = function to generate unwind data for
+ *      localsize = offset to symbols on stack
  */
 @trusted
-public void win64_pdata(Symbol *sf)
+public void win64_pdata(Symbol *sf, targ_size_t localsize)
 {
     //printf("win64_pdata()\n");
     assert(config.exe == EX_WIN64);
@@ -71,7 +72,7 @@ public void win64_pdata(Symbol *sf)
     symbol_keep(spdata);
     symbol_debug(spdata);
 
-    Symbol *sunwind = win64_unwind(sf);
+    Symbol *sunwind = win64_unwind(sf, localsize);
 
     /* 3 pointers are emitted:
      *  1. pointer to start of function sf
@@ -96,13 +97,14 @@ private:
 
 /**************************************************
  * Unwind data symbol goes in the .xdata section.
- * Input:
- *      sf      function to generate unwind data for
+ * Params:
+ *      sf        = function to generate unwind data for
+ *      localsize = offset to symbols on stack
  * Returns:
  *      generated symbol referring to unwind data
  */
 @trusted
-private Symbol *win64_unwind(Symbol *sf)
+private Symbol *win64_unwind(Symbol *sf, targ_size_t localsize)
 {
     // Generate the unwind name, which is $unwind$funcname
     size_t sflen = strlen(sf.Sident.ptr);
@@ -115,7 +117,7 @@ private Symbol *win64_unwind(Symbol *sf)
     symbol_keep(sunwind);
     symbol_debug(sunwind);
 
-    sunwind.Sdt = unwind_data();
+    sunwind.Sdt = unwind_data(localsize);
     sunwind.Sseg = symbol_iscomdat3(sf) ? MsCoffObj_seg_xdata_comdat(sf) : MsCoffObj_seg_xdata();
     sunwind.Salignment = 1;
     outdata(sunwind);
@@ -199,7 +201,7 @@ static if (0)
 
 
 @trusted
-private dt_t *unwind_data()
+private dt_t *unwind_data(targ_size_t localsize)
 {
     UNWIND_INFO ui;
 
diff --git a/compiler/src/dmd/backend/x86/cgcod.d b/compiler/src/dmd/backend/x86/cgcod.d
index c800ee1eeef7..a83e904aa687 100644
--- a/compiler/src/dmd/backend/x86/cgcod.d
+++ b/compiler/src/dmd/backend/x86/cgcod.d
@@ -498,7 +498,7 @@ void codgen(Symbol *sfunc)
         static if (MARS)
         {
             if (config.exe == EX_WIN64)
-                win64_pdata(sfunc);
+                win64_pdata(sfunc, localsize);
         }
 
         static if (MARS)
@@ -2860,7 +2860,7 @@ void scodelem(ref CGstate cg, ref CodeBuilder cdb, elem *e,regm_t *pretregs,regm
                         touse &= ~mj;
                         cg.mfuncreg &= ~mj;
                         cg.regcon.used |= mj;
-	                assert(!(cg.regcon.used & mPSW));
+                        assert(!(cg.regcon.used & mPSW));
                         break;
                     }
                 }