The recent stack_protect_combined_set_insn and
stack_protect_combined_test_insn force recomputing of GOT base, but
need to take into account that in FDPIC mode, the PIC register is
fixed by the ABI (r9).
2019-XX-XX Christophe Lyon <christophe.l...@st.com>
* config/arm/arm.md (stack_protect_combined_set_insn): Handle
FDPIC mode.
(stack_protect_combined_test_insn): Likewise.
Change-Id: Ib243fab0791fc883ca7b1c1205af1e0893f3e8c5
diff --git a/gcc/config/arm/arm.md b/gcc/config/arm/arm.md
index 0edcb1d..5a4dd00 100644
--- a/gcc/config/arm/arm.md
+++ b/gcc/config/arm/arm.md
@@ -8869,8 +8869,19 @@
{
if (flag_pic)
{
+ rtx pic_reg;
+
+ if (TARGET_FDPIC)
+ {
+ pic_reg = gen_rtx_REG (Pmode, FDPIC_REGNUM);
+ }
+ else
+ {
+ pic_reg = operands[3];
+ }
+
/* Forces recomputing of GOT base now. */
- legitimize_pic_address (operands[1], SImode, operands[2], operands[3],
+ legitimize_pic_address (operands[1], SImode, operands[2], pic_reg,
true /*compute_now*/);
}
else
@@ -8943,8 +8954,19 @@
if (flag_pic)
{
+ rtx pic_reg;
+
+ if (TARGET_FDPIC)
+ {
+ pic_reg = gen_rtx_REG (Pmode, FDPIC_REGNUM);
+ }
+ else
+ {
+ pic_reg = operands[4];
+ }
+
/* Forces recomputing of GOT base now. */
- legitimize_pic_address (operands[1], SImode, operands[3], operands[4],
+ legitimize_pic_address (operands[1], SImode, operands[3], pic_reg,
true /*compute_now*/);
}
else
--
2.6.3
