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| author | Richard Earnshaw <rearnsha@arm.com> | 1999-03-13 11:40:25 +0000 |
|---|---|---|
| committer | Richard Earnshaw <rearnsha@gcc.gnu.org> | 1999-03-13 11:40:25 +0000 |
| commit | 4b632bf12c35664476b2445ed6f0295ee19e6b56 (patch) | |
| tree | 3fae1b7f4220dfa1a76d91b29c2f6290a9a06aaf | |
| parent | 4995028c823a83c92c43d5fbdde25be8c7ed2e6b (diff) | |
| download | gcc-4b632bf12c35664476b2445ed6f0295ee19e6b56.zip gcc-4b632bf12c35664476b2445ed6f0295ee19e6b56.tar.gz gcc-4b632bf12c35664476b2445ed6f0295ee19e6b56.tar.bz2 | |
arm.c (arm_split_constant): Don't try to force a constant to memory after arm_reorg has run.
* arm.c (arm_split_constant): Don't try to force a constant to
memory after arm_reorg has run.
(after_arm_reorg): New static variable.
(arm_reorg): Set it.
(output_func_epilogue): Clear it.
From-SVN: r25742
| -rw-r--r-- | gcc/ChangeLog | 8 | ||||
| -rw-r--r-- | gcc/config/arm/arm.c | 17 |
2 files changed, 23 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index fb4c7c0..5e2ec7a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +Sat Mar 13 11:36:16 1999 Richard Earnshaw (rearnsha@arm.com) + + * arm.c (arm_split_constant): Don't try to force a constant to + memory after arm_reorg has run. + (after_arm_reorg): New static variable. + (arm_reorg): Set it. + (output_func_epilogue): Clear it. + Fri Mar 12 20:26:32 1999 David Edelsohn <edelsohn@mhpcc.edu> * configure.in ({rs6000,powerpc}-ibm-aix*): Set float_format to none. diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index 478c2a0..4a393c9 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -128,6 +128,8 @@ int lr_save_eliminated; static int return_used_this_function; +static int after_arm_reorg = 0; + static int arm_constant_limit = 3; /* For an explanation of these variables, see final_prescan_insn below. */ @@ -604,8 +606,15 @@ arm_split_constant (code, mode, val, target, source, subtargets) || (GET_CODE (target) == REG && GET_CODE (source) == REG && REGNO (target) != REGNO (source))) { - if (arm_gen_constant (code, mode, val, target, source, 1, 0) - > arm_constant_limit + (code != SET)) + /* After arm_reorg has been called, we can't fix up expensive + constants by pushing them into memory so we must synthesise + them in-line, regardless of the cost. This is only likely to + be more costly on chips that have load delay slots and we are + compiling without running the scheduler (so no splitting + occurred before the final instruction emission. */ + if (! after_arm_reorg + && (arm_gen_constant (code, mode, val, target, source, 1, 0) + > arm_constant_limit + (code != SET))) { if (code == SET) { @@ -4022,6 +4031,8 @@ arm_reorg (first) insn = scan; } } + + after_arm_reorg = 1; } @@ -5378,7 +5389,9 @@ output_func_epilogue (f, frame_size) epilogue_done: + /* Reset the ARM-specific per-function variables. */ current_function_anonymous_args = 0; + after_arm_reorg = 0; } static void |