diff options
Diffstat (limited to 'gcc/config/arm/arm.c')
| -rw-r--r-- | gcc/config/arm/arm.c | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index 768678d..b70e68b 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -8260,15 +8260,25 @@ output_return_instruction (rtx operand, int really_return, int reverse) return_reg = reg_names[LR_REGNUM]; if ((live_regs_mask & (1 << IP_REGNUM)) == (1 << IP_REGNUM)) - /* There are two possible reasons for the IP register being saved. - Either a stack frame was created, in which case IP contains the - old stack pointer, or an ISR routine corrupted it. If this in an - ISR routine then just restore IP, otherwise restore IP into SP. */ - if (! IS_INTERRUPT (func_type)) - { - live_regs_mask &= ~ (1 << IP_REGNUM); - live_regs_mask |= (1 << SP_REGNUM); - } + { + /* There are three possible reasons for the IP register + being saved. 1) a stack frame was created, in which case + IP contains the old stack pointer, or 2) an ISR routine + corrupted it, or 3) it was saved to align the stack on + iWMMXt. In case 1, restore IP into SP, otherwise just + restore IP. */ + if (frame_pointer_needed) + { + live_regs_mask &= ~ (1 << IP_REGNUM); + live_regs_mask |= (1 << SP_REGNUM); + } + else + { + if (! IS_INTERRUPT (func_type) + && ! TARGET_REALLY_IWMMXT) + abort (); + } + } /* On some ARM architectures it is faster to use LDR rather than LDM to load a single register. On other architectures, the |