public inbox for gcc-cvs@sourceware.org
help / color / mirror / Atom feed
* [gcc r10-10444] i386: Force inputs to a register to avoid lowpart_subreg failure [PR104458]
@ 2022-02-09 22:43 Uros Bizjak
0 siblings, 0 replies; only message in thread
From: Uros Bizjak @ 2022-02-09 22:43 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:983b7bcdd048650b193aad6018042b21626b89eb
commit r10-10444-g983b7bcdd048650b193aad6018042b21626b89eb
Author: Uros Bizjak <ubizjak@gmail.com>
Date: Wed Feb 9 23:40:55 2022 +0100
i386: Force inputs to a register to avoid lowpart_subreg failure [PR104458]
Input operands can be in the form of:
(subreg:DI (reg:V2SF 96) 0)
which chokes lowpart_subreg. Force inputs to a register, which is
preferable even when the input operand is from memory.
2022-02-09 Uroš Bizjak <ubizjak@gmail.com>
gcc/ChangeLog:
PR target/104458
* config/i386/i386-expand.c (ix86_split_idivmod):
Force operands[2] and operands[3] into a register..
gcc/testsuite/ChangeLog:
PR target/104458
* gcc.target/i386/pr104458.c: New test.
Diff:
---
gcc/config/i386/i386-expand.c | 3 +++
gcc/testsuite/gcc.target/i386/pr104458.c | 13 +++++++++++++
2 files changed, 16 insertions(+)
diff --git a/gcc/config/i386/i386-expand.c b/gcc/config/i386/i386-expand.c
index 47d52550e5e..d690d5b9bc1 100644
--- a/gcc/config/i386/i386-expand.c
+++ b/gcc/config/i386/i386-expand.c
@@ -1140,6 +1140,9 @@ ix86_split_idivmod (machine_mode mode, rtx operands[],
rtx scratch, tmp0, tmp1, tmp2;
rtx (*gen_divmod4_1) (rtx, rtx, rtx, rtx);
+ operands[2] = force_reg (mode, operands[2]);
+ operands[3] = force_reg (mode, operands[3]);
+
switch (mode)
{
case E_SImode:
diff --git a/gcc/testsuite/gcc.target/i386/pr104458.c b/gcc/testsuite/gcc.target/i386/pr104458.c
new file mode 100644
index 00000000000..d1d28c13118
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr104458.c
@@ -0,0 +1,13 @@
+/* PR target/104458 */
+/* { dg-do compile { target { ! ia32 } } } */
+/* { dg-options "-O1 -m8bit-idiv" } */
+
+typedef float __attribute__((__vector_size__ (8))) F;
+
+int i;
+
+void
+foo (F f)
+{
+ i += i % (long) f;
+}
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2022-02-09 22:43 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-02-09 22:43 [gcc r10-10444] i386: Force inputs to a register to avoid lowpart_subreg failure [PR104458] Uros Bizjak
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).