From: Uros Bizjak <ubizjak@gmail.com>
To: "gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>
Subject: [committed] i386: Fix ICE with -fsplit-stack -mcmodel=large [PR112686]
Date: Fri, 24 Nov 2023 17:33:50 +0100 [thread overview]
Message-ID: <CAFULd4Zc_D8r1Hhg7hdKm1dyutf1j1kwNMZUOXin03o5nMLOnw@mail.gmail.com> (raw)
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For -mcmodel=large, we have to load function address to a register.
PR target/112686
gcc/ChangeLog:
* config/i386/i386.cc (ix86_expand_split_stack_prologue): Load
function address to a register for ix86_cmodel == CM_LARGE.
gcc/testsuite/ChangeLog:
* gcc.target/i386/pr112686.c: New test.
Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.
Uros.
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diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc
index 7b922857d80..9390f525b99 100644
--- a/gcc/config/i386/i386.cc
+++ b/gcc/config/i386/i386.cc
@@ -10481,6 +10481,8 @@ ix86_expand_split_stack_prologue (void)
SYMBOL_REF_FLAGS (split_stack_fn_large) |= SYMBOL_FLAG_LOCAL;
}
+ fn = split_stack_fn_large;
+
if (ix86_cmodel == CM_LARGE_PIC)
{
rtx_code_label *label;
@@ -10494,16 +10496,15 @@ ix86_expand_split_stack_prologue (void)
emit_insn (gen_set_rip_rex64 (reg10, label));
emit_insn (gen_set_got_offset_rex64 (reg11, label));
emit_insn (gen_add2_insn (reg10, reg11));
- x = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, split_stack_fn_large),
- UNSPEC_GOT);
+ x = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, fn), UNSPEC_GOT);
x = gen_rtx_CONST (Pmode, x);
emit_move_insn (reg11, x);
x = gen_rtx_PLUS (Pmode, reg10, reg11);
x = gen_const_mem (Pmode, x);
fn = copy_to_suggested_reg (x, reg11, Pmode);
}
- else
- fn = split_stack_fn_large;
+ else if (ix86_cmodel == CM_LARGE)
+ fn = copy_to_suggested_reg (fn, reg11, Pmode);
/* When using the large model we need to load the address
into a register, and we've run out of registers. So we
diff --git a/gcc/testsuite/gcc.target/i386/pr112686.c b/gcc/testsuite/gcc.target/i386/pr112686.c
new file mode 100644
index 00000000000..858e91ba727
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr112686.c
@@ -0,0 +1,5 @@
+/* PR target/112686 */
+/* { dg-do compile { target lp64 } } */
+/* { dg-options "-fsplit-stack -mcmodel=large" } */
+
+void foo (void) {}
next reply other threads:[~2023-11-24 16:34 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-24 16:33 Uros Bizjak [this message]
2023-11-26 10:51 FX Coudert
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