diff options
Diffstat (limited to '4.4.5/gentoo/30_all_gcc-4.4-ppc-msingle-pic-base.patch')
| -rw-r--r-- | 4.4.5/gentoo/30_all_gcc-4.4-ppc-msingle-pic-base.patch | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/4.4.5/gentoo/30_all_gcc-4.4-ppc-msingle-pic-base.patch b/4.4.5/gentoo/30_all_gcc-4.4-ppc-msingle-pic-base.patch new file mode 100644 index 0000000..59b62e4 --- /dev/null +++ b/4.4.5/gentoo/30_all_gcc-4.4-ppc-msingle-pic-base.patch @@ -0,0 +1,93 @@ +https://bugs.gentoo.org/347281 + +backported from gcc-4.6 + +From a9321d3549b5d29024c4bb011bf6e75903aef4e9 Mon Sep 17 00:00:00 2001 +From: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> +Date: Sat, 9 Oct 2010 12:45:39 +0200 +Subject: [PATCHv3] PowerPC: Add msingle-pic-base option. + +Do not generate fPIC/fpic prologue nor save +and restore PIC register. + +Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> +--- + v2: Use Var instead of Mask and add some docs per + Michael Meissner <meissner@linux.vnet.ibm.com> + v3: Make order in if statement consistent. + + gcc/config/rs6000/rs6000.c | 5 +++++ + gcc/config/rs6000/rs6000.opt | 4 ++++ + gcc/doc/invoke.texi | 9 ++++++++- + 3 files changed, 17 insertions(+), 1 deletions(-) + +diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c +index 63f8ef9..310d28b 100644 +--- a/gcc/config/rs6000/rs6000.c ++++ b/gcc/config/rs6000/rs6000.c +@@ -16036,8 +16036,10 @@ rs6000_reg_live_or_pic_offset_p (int reg) + return ((df_regs_ever_live_p (reg) + && (!call_used_regs[reg] + || (reg == RS6000_PIC_OFFSET_TABLE_REGNUM ++ && !TARGET_SINGLE_PIC_BASE + && TARGET_TOC && TARGET_MINIMAL_TOC))) + || (reg == RS6000_PIC_OFFSET_TABLE_REGNUM ++ && !TARGET_SINGLE_PIC_BASE + && ((DEFAULT_ABI == ABI_V4 && flag_pic != 0) + || (DEFAULT_ABI == ABI_DARWIN && flag_pic)))); + } +@@ -16737,6 +16739,9 @@ rs6000_emit_prologue (void) + insn = emit_insn (generate_set_vrsave (reg, info, 0)); + } + ++ if (TARGET_SINGLE_PIC_BASE) ++ return; /* Do not set PIC register */ ++ + /* If we are using RS6000_PIC_OFFSET_TABLE_REGNUM, we need to set it up. */ + if ((TARGET_TOC && TARGET_MINIMAL_TOC && get_pool_size () != 0) + || (DEFAULT_ABI == ABI_V4 +diff --git a/gcc/config/rs6000/rs6000.opt b/gcc/config/rs6000/rs6000.opt +index 8a62352..2adb6dd 100644 +--- a/gcc/config/rs6000/rs6000.opt ++++ b/gcc/config/rs6000/rs6000.opt +@@ -119,6 +119,10 @@ mupdate + Target Report RejectNegative InverseMask(NO_UPDATE, UPDATE) + Generate load/store with update instructions + ++msingle-pic-base ++Target Report Var(TARGET_SINGLE_PIC_BASE) Init(0) ++Do not load the PIC register in function prologues ++ + mavoid-indexed-addresses + Target Report Var(TARGET_AVOID_XFORM) Init(-1) + Avoid generation of indexed load/store instructions when possible +diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi +index 393e418..fc30537 100644 +--- a/gcc/doc/invoke.texi ++++ b/gcc/doc/invoke.texi +@@ -728,7 +728,7 @@ See RS/6000 and PowerPC Options. + -mstrict-align -mno-strict-align -mrelocatable @gol + -mno-relocatable -mrelocatable-lib -mno-relocatable-lib @gol + -mtoc -mno-toc -mlittle -mlittle-endian -mbig -mbig-endian @gol +--mdynamic-no-pic -maltivec -mswdiv @gol ++-mdynamic-no-pic -maltivec -mswdiv -msingle-pic-base @gol + -mprioritize-restricted-insns=@var{priority} @gol + -msched-costly-dep=@var{dependence_type} @gol + -minsert-sched-nops=@var{scheme} @gol +@@ -14129,6 +14129,13 @@ relocatable, but that its external references are relocatable. The + resulting code is suitable for applications, but not shared + libraries. + ++@item -msingle-pic-base ++@opindex msingle-pic-base ++Treat the register used for PIC addressing as read-only, rather than ++loading it in the prologue for each function. The run-time system is ++responsible for initializing this register with an appropriate value ++before execution begins. ++ + @item -mprioritize-restricted-insns=@var{priority} + @opindex mprioritize-restricted-insns + This option controls the priority that is assigned to +-- +1.7.2.2 + |