diff options
Diffstat (limited to 'gcc/config/arm/arm.c')
| -rw-r--r-- | gcc/config/arm/arm.c | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index 4bffcb5..db27913 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -938,6 +938,10 @@ use_return_insn (iscond) consideration. */ if (func_type & (ARM_FT_VOLATILE | ARM_FT_NAKED)) return 0; + + /* So do interrupt functions that use the frame pointer. */ + if (IS_INTERRUPT (func_type) && frame_pointer_needed) + return 0; /* As do variadic functions. */ if (current_function_pretend_args_size @@ -7092,7 +7096,7 @@ output_move_double (operands) { if (GET_CODE (otherops[2]) == CONST_INT) { - switch (INTVAL (otherops[2])) + switch ((int) INTVAL (otherops[2])) { case -8: output_asm_insn ("ldm%?db\t%1, %M0", otherops); @@ -7168,7 +7172,7 @@ output_move_double (operands) case PLUS: if (GET_CODE (XEXP (XEXP (operands[0], 0), 1)) == CONST_INT) { - switch (INTVAL (XEXP (XEXP (operands[0], 0), 1))) + switch ((int) INTVAL (XEXP (XEXP (operands[0], 0), 1))) { case -8: output_asm_insn ("stm%?db\t%m0, %M1", operands); @@ -8813,18 +8817,19 @@ arm_expand_prologue () RTX_FRAME_RELATED_P (insn) = 1; } - /* If this is an interrupt service routine, and the link register is - going to be pushed, subtracting four now will mean that the - function return can be done with a single instruction. */ + /* If this is an interrupt service routine, and the link register + is going to be pushed, and we are not creating a stack frame, + (which would involve an extra push of IP and a pop in the epilogue) + subtracting four from LR now will mean that the function return + can be done with a single instruction. */ if ((func_type == ARM_FT_ISR || func_type == ARM_FT_FIQ) - && (live_regs_mask & (1 << LR_REGNUM)) != 0) - { - emit_insn (gen_rtx_SET (SImode, - gen_rtx_REG (SImode, LR_REGNUM), - gen_rtx_PLUS (SImode, - gen_rtx_REG (SImode, LR_REGNUM), - GEN_INT (-4)))); - } + && (live_regs_mask & (1 << LR_REGNUM)) != 0 + && ! frame_pointer_needed) + emit_insn (gen_rtx_SET (SImode, + gen_rtx_REG (SImode, LR_REGNUM), + gen_rtx_PLUS (SImode, + gen_rtx_REG (SImode, LR_REGNUM), + GEN_INT (-4)))); if (live_regs_mask) { |