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* [gcc r9-9096] i386: Fix up ix86_md_asm_adjust for TImode [PR98086]
@ 2020-12-03 18:54 Uros Bizjak
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From: Uros Bizjak @ 2020-12-03 18:54 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:521c839fad4e4a30cdadda254fb3f07706285033
commit r9-9096-g521c839fad4e4a30cdadda254fb3f07706285033
Author: Uros Bizjak <ubizjak@gmail.com>
Date: Thu Dec 3 19:08:23 2020 +0100
i386: Fix up ix86_md_asm_adjust for TImode [PR98086]
ix86_md_asm_adjust assumes that dest_mode can be only [QHSD]Imode
and nothing else. The patch rewrites zero-extension part to use
convert_to_mode to handle TImode and hypothetically even wider modes.
2020-12-03 Uroš Bizjak <ubizjak@gmail.com>
Jakub Jelinek <jakub@redhat.com>
gcc/
PR target/98086
* config/i386/i386.c (ix86_md_asm_adjustmd): Rewrite
zero-extension part to use convert_to_mode.
gcc/testsuite/
PR target/98086
* gcc.target/i386/pr98086.c: New test.
Diff:
---
gcc/config/i386/i386.c | 38 +++++++--------------------------
gcc/testsuite/gcc.target/i386/pr98086.c | 17 +++++++++++++++
2 files changed, 25 insertions(+), 30 deletions(-)
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index bd61be61fdf..e8982c507e4 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -44424,40 +44424,18 @@ ix86_md_asm_adjust (vec<rtx> &outputs, vec<rtx> &/*inputs*/,
continue;
}
- if (dest_mode == DImode && !TARGET_64BIT)
- dest_mode = SImode;
-
- if (dest_mode != QImode)
- {
- rtx destqi = gen_reg_rtx (QImode);
- emit_insn (gen_rtx_SET (destqi, x));
-
- if (TARGET_ZERO_EXTEND_WITH_AND
- && optimize_function_for_speed_p (cfun))
- {
- x = force_reg (dest_mode, const0_rtx);
-
- emit_insn (gen_movstrictqi (gen_lowpart (QImode, x), destqi));
- }
- else
- {
- x = gen_rtx_ZERO_EXTEND (dest_mode, destqi);
- if (dest_mode == GET_MODE (dest)
- && !register_operand (dest, GET_MODE (dest)))
- x = force_reg (dest_mode, x);
- }
- }
-
- if (dest_mode != GET_MODE (dest))
+ if (dest_mode == QImode)
+ emit_insn (gen_rtx_SET (dest, x));
+ else
{
- rtx tmp = gen_reg_rtx (SImode);
+ rtx reg = gen_reg_rtx (QImode);
+ emit_insn (gen_rtx_SET (reg, x));
- emit_insn (gen_rtx_SET (tmp, x));
- emit_insn (gen_zero_extendsidi2 (dest, tmp));
+ reg = convert_to_mode (dest_mode, reg, 1);
+ emit_move_insn (dest, reg);
}
- else
- emit_insn (gen_rtx_SET (dest, x));
}
+
rtx_insn *seq = get_insns ();
end_sequence ();
diff --git a/gcc/testsuite/gcc.target/i386/pr98086.c b/gcc/testsuite/gcc.target/i386/pr98086.c
new file mode 100644
index 00000000000..254a3b9bef6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr98086.c
@@ -0,0 +1,17 @@
+/* PR target/98086 */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+#ifdef __x86_64__
+typedef __int128 T;
+#else
+typedef long long T;
+#endif
+
+T x;
+
+void
+foo (void)
+{
+ __asm ("" : "=@ccc" (x));
+}
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