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ipa-reorder-for-locality - Adjust bootstrap-lto-locality and param to reduce compile time

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This patch turns off -fipa-reorder-for-locality for -fprofile-generate because
it's not required and contributes to the bloated time taken by bootstrap.  It
also reduces the default partition size by half; the increased number of
partitions speeds up LTRANS phase.

Bootstrapped and tested on aarch64-none-linux-gnu. OK for mainline?

Signed-off-by: Prachi Godbole <pgodbole@nvidia.com>

config/ChangeLog:

	* bootstrap-lto-locality.mk (STAGEprofile_CFLAGS): Remove
	-fipa-reorder-for-locality.
	(STAGEtrain_CFLAGS): Ditto.

gcc/ChangeLog:

	* params.opt: Change default param value.
This commit is contained in:
Prachi Godbole
2026-02-03 23:23:10 -08:00
committed by Kyrylo Tkachov
parent d77d64766a
commit 9c24b4d7df
2 changed files with 3 additions and 3 deletions
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4
config/bootstrap-lto-locality.mk
View File

@@ -2,8 +2,8 @@
STAGE2_CFLAGS += -flto=jobserver -frandom-seed=1 -fipa-reorder-for-locality
STAGE3_CFLAGS += -flto=jobserver -frandom-seed=1 -fipa-reorder-for-locality
STAGEprofile_CFLAGS += -flto=jobserver -frandom-seed=1 -fipa-reorder-for-locality
STAGEtrain_CFLAGS += -flto=jobserver -frandom-seed=1 -fipa-reorder-for-locality
STAGEprofile_CFLAGS += -flto=jobserver -frandom-seed=1
STAGEtrain_CFLAGS += -flto=jobserver -frandom-seed=1
STAGEfeedback_CFLAGS += -flto=jobserver -frandom-seed=1 -fipa-reorder-for-locality
# assumes the host supports the linker plugin

2
gcc/params.opt
View File

@@ -517,7 +517,7 @@ Common Joined UInteger Var(param_lto_locality_size) Init(1000) IntegerRange(1, 6
Size cut-off for callee including inlined calls to be cloned for a particular caller.
-param=lto-max-locality-partition=
Common Joined UInteger Var(param_max_locality_partition_size) Init(1000000) Param
Common Joined UInteger Var(param_max_locality_partition_size) Init(500000) Param
Maximal size of a locality partition for LTO (in estimated instructions). Value of 0 results in default value being used.
Enum