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| author | Christophe Lyon <christophe.lyon@st.com> | 2019-09-10 09:49:20 +0200 |
|---|---|---|
| committer | Christophe Lyon <clyon@gcc.gnu.org> | 2019-09-10 09:49:20 +0200 |
| commit | 4997c9aed45b4439474005c4c71fac65151d1719 (patch) | |
| tree | 15890a51cbc79b3ea6f3535c8a36b6a91707994e | |
| parent | 5d727a4b20257275df59182b00f3bf240772cd0d (diff) | |
| download | gcc-4997c9aed45b4439474005c4c71fac65151d1719.zip gcc-4997c9aed45b4439474005c4c71fac65151d1719.tar.gz gcc-4997c9aed45b4439474005c4c71fac65151d1719.tar.bz2 | |
[ARM/FDPIC v6 07/24] [ARM] FDPIC: Avoid saving/restoring r9 on stack since it is read-only
2019-09-10 Christophe Lyon <christophe.lyon@st.com>
Mickaël Guêné <mickael.guene@st.com>
gcc/
* config/arm/arm.h (PIC_REGISTER_MAY_NEED_SAVING): New helper.
* config/arm/arm.c (arm_compute_save_reg0_reg12_mask): Handle
FDPIC.
Co-Authored-By: Mickaël Guêné <mickael.guene@st.com>
From-SVN: r275569
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/config/arm/arm.c | 8 | ||||
| -rw-r--r-- | gcc/config/arm/arm.h | 7 |
3 files changed, 16 insertions, 6 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index a212eb3..7b061d1 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,6 +1,13 @@ 2019-09-10 Christophe Lyon <christophe.lyon@st.com> Mickaël Guêné <mickael.guene@st.com> + * config/arm/arm.h (PIC_REGISTER_MAY_NEED_SAVING): New helper. + * config/arm/arm.c (arm_compute_save_reg0_reg12_mask): Handle + FDPIC. + +2019-09-10 Christophe Lyon <christophe.lyon@st.com> + Mickaël Guêné <mickael.guene@st.com> + * ginclude/unwind-arm-common.h (unwinder_cache): Add reserved5 field. diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index c34aab8..6ff3001 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -19571,9 +19571,7 @@ arm_compute_save_reg0_reg12_mask (void) save_reg_mask |= (1 << reg); /* Also save the pic base register if necessary. */ - if (flag_pic - && !TARGET_SINGLE_PIC_BASE - && arm_pic_register != INVALID_REGNUM + if (PIC_REGISTER_MAY_NEED_SAVING && crtl->uses_pic_offset_table) save_reg_mask |= 1 << PIC_OFFSET_TABLE_REGNUM; } @@ -19605,9 +19603,7 @@ arm_compute_save_reg0_reg12_mask (void) /* If we aren't loading the PIC register, don't stack it even though it may be live. */ - if (flag_pic - && !TARGET_SINGLE_PIC_BASE - && arm_pic_register != INVALID_REGNUM + if (PIC_REGISTER_MAY_NEED_SAVING && (df_regs_ever_live_p (PIC_OFFSET_TABLE_REGNUM) || crtl->uses_pic_offset_table)) save_reg_mask |= 1 << PIC_OFFSET_TABLE_REGNUM; diff --git a/gcc/config/arm/arm.h b/gcc/config/arm/arm.h index e404e2c..490d22d 100644 --- a/gcc/config/arm/arm.h +++ b/gcc/config/arm/arm.h @@ -1960,6 +1960,13 @@ extern unsigned arm_pic_register; || label_mentioned_p (get_pool_constant (X))))) \ || tls_mentioned_p (X)) +/* We may want to save the PIC register if it is a dedicated one. */ +#define PIC_REGISTER_MAY_NEED_SAVING \ + (flag_pic \ + && !TARGET_SINGLE_PIC_BASE \ + && !TARGET_FDPIC \ + && arm_pic_register != INVALID_REGNUM) + /* We need to know when we are making a constant pool; this determines whether data needs to be in the GOT or can be referenced via a GOT offset. */ |