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| author | Ian Lance Taylor <ian@gcc.gnu.org> | 1996-12-13 01:00:49 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 1996-12-13 01:00:49 +0000 |
| commit | f95182a4a947cb4edc01f282c7dbfe81502a7914 (patch) | |
| tree | caede46b00bcf364b560a6857aad030dd987eaad /gcc/function.c | |
| parent | 6b9300aa7077c95105d86f66826e33ced678a1c0 (diff) | |
| download | gcc-f95182a4a947cb4edc01f282c7dbfe81502a7914.zip gcc-f95182a4a947cb4edc01f282c7dbfe81502a7914.tar.gz gcc-f95182a4a947cb4edc01f282c7dbfe81502a7914.tar.bz2 | |
Check SMALL_REGISTER_CLASSES at runtime
From-SVN: r13302
Diffstat (limited to 'gcc/function.c')
| -rw-r--r-- | gcc/function.c | 45 |
1 files changed, 25 insertions, 20 deletions
diff --git a/gcc/function.c b/gcc/function.c index 77a7566..d488be1 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -1578,27 +1578,30 @@ fixup_var_refs_insns (var, promoted_mode, unsignedp, insn, toplevel) of the CALL_INSN and see if the next insn uses both that and VAR. */ - if (call_dest != 0 && GET_CODE (insn) == INSN - && reg_mentioned_p (var, PATTERN (insn)) - && reg_mentioned_p (call_dest, PATTERN (insn))) + if (SMALL_REGISTER_CLASSES) { - rtx temp = gen_reg_rtx (GET_MODE (call_dest)); + if (call_dest != 0 && GET_CODE (insn) == INSN + && reg_mentioned_p (var, PATTERN (insn)) + && reg_mentioned_p (call_dest, PATTERN (insn))) + { + rtx temp = gen_reg_rtx (GET_MODE (call_dest)); - emit_insn_before (gen_move_insn (temp, call_dest), insn); + emit_insn_before (gen_move_insn (temp, call_dest), insn); - PATTERN (insn) = replace_rtx (PATTERN (insn), - call_dest, temp); - } + PATTERN (insn) = replace_rtx (PATTERN (insn), + call_dest, temp); + } - if (GET_CODE (insn) == CALL_INSN - && GET_CODE (PATTERN (insn)) == SET) - call_dest = SET_DEST (PATTERN (insn)); - else if (GET_CODE (insn) == CALL_INSN - && GET_CODE (PATTERN (insn)) == PARALLEL - && GET_CODE (XVECEXP (PATTERN (insn), 0, 0)) == SET) - call_dest = SET_DEST (XVECEXP (PATTERN (insn), 0, 0)); - else - call_dest = 0; + if (GET_CODE (insn) == CALL_INSN + && GET_CODE (PATTERN (insn)) == SET) + call_dest = SET_DEST (PATTERN (insn)); + else if (GET_CODE (insn) == CALL_INSN + && GET_CODE (PATTERN (insn)) == PARALLEL + && GET_CODE (XVECEXP (PATTERN (insn), 0, 0)) == SET) + call_dest = SET_DEST (XVECEXP (PATTERN (insn), 0, 0)); + else + call_dest = 0; + } #endif /* See if we have to do anything to INSN now that VAR is in @@ -5163,7 +5166,8 @@ expand_function_start (subr, parms_have_cleanups) #ifdef SMALL_REGISTER_CLASSES /* Delay copying static chain if it is not a register to avoid conflicts with regs used for parameters. */ - if (GET_CODE (static_chain_incoming_rtx) == REG) + if (! SMALL_REGISTER_CLASSES + || GET_CODE (static_chain_incoming_rtx) == REG) #endif emit_move_insn (last_ptr, static_chain_incoming_rtx); } @@ -5277,7 +5281,7 @@ expand_function_start (subr, parms_have_cleanups) /* Copy the static chain now if it wasn't a register. The delay is to avoid conflicts with the parameter passing registers. */ - if (current_function_needs_context) + if (SMALL_REGISTER_CLASSES && current_function_needs_context) if (GET_CODE (static_chain_incoming_rtx) != REG) emit_move_insn (last_ptr, static_chain_incoming_rtx); #endif @@ -5319,7 +5323,8 @@ expand_function_start (subr, parms_have_cleanups) /* If the static chain originally came in a register, put it back there, then move it out in the next insn. The reason for this peculiar code is to satisfy function integration. */ - if (GET_CODE (static_chain_incoming_rtx) == REG) + if (SMALL_REGISTER_CLASSES + && GET_CODE (static_chain_incoming_rtx) == REG) emit_move_insn (static_chain_incoming_rtx, last_ptr); #endif |