This changes it from bytes to kB since its value is limited to
2147483648.
Bootstrap running on x86_64-unknown-linux-gnu, will push to trunk
(but only there).
2021-01-29 Richard Biener <rguent...@suse.de>
* doc/invoke.texi (--param max-gcse-memory): Document unit
of size.
* gcse.c (gcse_or_cprop_is_too_expensive): Adjust.
* params.opt (--param max-gcse-memory): Adjust default and
document unit of size.
---
gcc/doc/invoke.texi | 2 +-
gcc/gcse.c | 4 ++--
gcc/params.opt | 4 ++--
3 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index d9e49c4a0da..a89d3859d6d 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -13075,7 +13075,7 @@ should be removed when the delay slot code is rewritten
to maintain the
control-flow graph.
@item max-gcse-memory
-The approximate maximum amount of memory that can be allocated in
+The approximate maximum amount of memory in @code{kB} that can be allocated in
order to perform the global common subexpression elimination
optimization. If more memory than specified is required, the
optimization is not done.
diff --git a/gcc/gcse.c b/gcc/gcse.c
index 29c9f900a8c..2c81fe41336 100644
--- a/gcc/gcse.c
+++ b/gcc/gcse.c
@@ -4007,14 +4007,14 @@ gcse_or_cprop_is_too_expensive (const char *pass)
/* If allocating memory for the dataflow bitmaps would take up too much
storage it's better just to disable the optimization. */
- if (memory_request > (unsigned HOST_WIDE_INT)param_max_gcse_memory)
+ if (memory_request / 1024 > (unsigned HOST_WIDE_INT)param_max_gcse_memory)
{
warning (OPT_Wdisabled_optimization,
"%s: %d basic blocks and %d registers; "
"increase %<--param max-gcse-memory%> above "
HOST_WIDE_INT_PRINT_UNSIGNED,
pass, n_basic_blocks_for_fn (cfun), max_reg_num (),
- memory_request);
+ memory_request / 1024);
return true;
}
diff --git a/gcc/params.opt b/gcc/params.opt
index cfed980a4d2..dff8a331f82 100644
--- a/gcc/params.opt
+++ b/gcc/params.opt
@@ -514,8 +514,8 @@ Common Joined UInteger Var(param_max_gcse_insertion_ratio)
Init(20) Param Optimi
The maximum ratio of insertions to deletions of expressions in GCSE.
-param=max-gcse-memory=
-Common Joined UInteger Var(param_max_gcse_memory) Init(134217728) Param
Optimization
-The maximum amount of memory to be allocated by GCSE.
+Common Joined UInteger Var(param_max_gcse_memory) Init(131072) Param
Optimization
+The maximum amount of memory to be allocated by GCSE, in kilobytes.
-param=max-goto-duplication-insns=
Common Joined UInteger Var(param_max_goto_duplication_insns) Init(8) Param
Optimization
--
2.26.2
