public inbox for gcc-cvs@sourceware.org
help / color / mirror / Atom feed
* [gcc r12-7183] middle-end: updating the reg use in exit block for -fzero-call-used-regs [PR100775]
@ 2022-02-10 16:40 Qing Zhao
0 siblings, 0 replies; only message in thread
From: Qing Zhao @ 2022-02-10 16:40 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:b32305b41dcafc5fb6974c0da3ce2f62251afdbf
commit r12-7183-gb32305b41dcafc5fb6974c0da3ce2f62251afdbf
Author: Qing Zhao <qing.zhao@oracle.com>
Date: Thu Feb 10 16:40:39 2022 +0000
middle-end: updating the reg use in exit block for -fzero-call-used-regs [PR100775]
In the pass_zero_call_used_regs, when updating dataflow info after adding
the register zeroing sequence in the epilogue of the function, we should
call "df_update_exit_block_uses" to update the register use information in
the exit block to include all the registers that have been zeroed.
2022-02-10 Qing Zhao <qing.zhao@oracle.com>
gcc/ChangeLog:
PR middle-end/100775
* function.cc (gen_call_used_regs_seq): Call
df_update_exit_block_uses when updating df.
gcc/testsuite/ChangeLog:
PR middle-end/100775
* gcc.target/arm/pr100775.c: New test.
Diff:
---
gcc/function.cc | 2 +-
gcc/testsuite/gcc.target/arm/pr100775.c | 9 +++++++++
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/gcc/function.cc b/gcc/function.cc
index e1d2565f8d9..d5ed51a6a66 100644
--- a/gcc/function.cc
+++ b/gcc/function.cc
@@ -5941,7 +5941,7 @@ gen_call_used_regs_seq (rtx_insn *ret, unsigned int zero_regs_type)
/* Update the data flow information. */
crtl->must_be_zero_on_return |= zeroed_hardregs;
- df_set_bb_dirty (EXIT_BLOCK_PTR_FOR_FN (cfun));
+ df_update_exit_block_uses ();
}
}
diff --git a/gcc/testsuite/gcc.target/arm/pr100775.c b/gcc/testsuite/gcc.target/arm/pr100775.c
new file mode 100644
index 00000000000..c648cd5e8f7
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/pr100775.c
@@ -0,0 +1,9 @@
+/* { dg-do compile } */
+/* { dg-skip-if "" { ! { arm_thumb1_ok || arm_thumb2_ok } } } */
+/* { dg-options "-mthumb -fzero-call-used-regs=used" } */
+
+int
+foo (int x)
+{
+ return x;
+}
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2022-02-10 16:40 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-02-10 16:40 [gcc r12-7183] middle-end: updating the reg use in exit block for -fzero-call-used-regs [PR100775] Qing Zhao
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).