[gcc r13-6392] gcc: Remove size limit of PCH for *-*-mingw32 hosts

[Jonathan Yong <jyong@gcc.gnu.org>]

https://gcc.gnu.org/g:f769d22ab685671095525d09ef29eeeed0ae3cee

commit r13-6392-gf769d22ab685671095525d09ef29eeeed0ae3cee
Author: LIU Hao <lh_mouse@126.com>
Date:   Tue May 10 13:19:07 2022 +0800

    gcc: Remove size limit of PCH for *-*-mingw32 hosts
    
    PCHs can now be relocated, so the size limit makes no sense any more.
    
    This patch was submited to MSYS2 9 months ago for GCC 12. No issue has been reported so far.
    
    Reference: https://github.com/msys2/MINGW-packages/blob/717d5a5a09e2370e3bd7e12b393a26dbfbe48921/mingw-w64-gcc/0010-Fix-using-large-PCH.patch
    Signed-off-by: LIU Hao <lh_mouse@126.com>
    
    gcc/ChangeLog:
    
            PR pch/14940
            * config/i386/host-mingw32.cc (mingw32_gt_pch_get_address):
            Remove the size limit `pch_VA_max_size`
    
    Signed-off-by: Jonathan Yong <10walls@gmail.com>

Diff:
---
 gcc/config/i386/host-mingw32.cc | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/gcc/config/i386/host-mingw32.cc b/gcc/config/i386/host-mingw32.cc
index aeee956ed11..acff6138d63 100644
--- a/gcc/config/i386/host-mingw32.cc
+++ b/gcc/config/i386/host-mingw32.cc
@@ -44,9 +44,6 @@ static size_t mingw32_gt_pch_alloc_granularity (void);
 
 static inline void w32_error(const char*, const char*, int, const char*);
 
-/* FIXME: Is this big enough?  */
-static const size_t pch_VA_max_size  = 128 * 1024 * 1024;
-
 /* Granularity for reserving address space.  */
 static size_t va_granularity = 0x10000;
 
@@ -88,9 +85,6 @@ static void *
 mingw32_gt_pch_get_address (size_t size, int)
 {
   void* res;
-  size = (size + va_granularity - 1) & ~(va_granularity - 1);
-  if (size > pch_VA_max_size)
-    return NULL;
 
   /* FIXME: We let system determine base by setting first arg to NULL.
      Allocating at top of available address space avoids unnecessary
@@ -100,7 +94,7 @@ mingw32_gt_pch_get_address (size_t size, int)
      If we allocate at bottom we need to reserve the address as early
      as possible and at the same point in each invocation. */
  
-  res = VirtualAlloc (NULL, pch_VA_max_size,
+  res = VirtualAlloc (NULL, size,
 		      MEM_RESERVE | MEM_TOP_DOWN,
 		      PAGE_NOACCESS);
   if (!res)
@@ -150,7 +144,7 @@ mingw32_gt_pch_use_address (void *&addr, size_t size, int fd,
 
   /* Offset must be also be a multiple of allocation granularity for
      this to work.  We can't change the offset. */ 
-  if ((offset & (va_granularity - 1)) != 0 || size > pch_VA_max_size)
+  if ((offset & (va_granularity - 1)) != 0)
     return -1;