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Add --param max-unrolled-insns=<n> support

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From-SVN: r50787
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Michael Meissner 2002-03-14 23:31:50 +00:00 committed by Michael Meissner
parent 1224938570
commit 03e9dbc91c
6 changed files with 31 additions and 8 deletions
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15
gcc/ChangeLog
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@ -1,3 +1,18 @@
2002-03-14 Michael Meissner <meissner@redhat.com>
* params.def (PARAM_MAX_UNROLLED_INSNS): New macro, default to
100, allowing MAX_UNROLLED_INSNS to be overridden.
* params.h (MAX_UNROLLED_INSNS): Define so it can be overridden by
--param.
* unroll.c (params.h): Include.
(MAX_UNROLLED_INSNS): Delete, now in params.h.
* doc/invoke.texi (--param max-unroll-insns): Document.
* Makefile.in (unroll.o): Add $(PARAMS_H) dependency.
2002-03-14 Richard Earnshaw <rearnsha@arm.com>
* arm.md: Fix warnings about constraints in peepholes and splits.

2
gcc/Makefile.in
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@ -1483,7 +1483,7 @@ doloop.o : doloop.c $(CONFIG_H) $(SYSTEM_H) $(RTL_H) flags.h $(LOOP_H) \
$(EXPR_H) hard-reg-set.h $(BASIC_BLOCK_H) $(TM_P_H) toplev.h
unroll.o : unroll.c $(CONFIG_H) $(SYSTEM_H) $(RTL_H) insn-config.h function.h \
$(INTEGRATE_H) $(REGS_H) $(RECOG_H) flags.h $(EXPR_H) $(LOOP_H) toplev.h \
hard-reg-set.h varray.h $(BASIC_BLOCK_H) $(TM_P_H) $(PREDICT_H)
hard-reg-set.h varray.h $(BASIC_BLOCK_H) $(TM_P_H) $(PREDICT_H) $(PARAMS_H)
flow.o : flow.c $(CONFIG_H) $(SYSTEM_H) $(RTL_H) $(TREE_H) flags.h insn-config.h \
$(BASIC_BLOCK_H) $(REGS_H) hard-reg-set.h output.h toplev.h $(RECOG_H) \
function.h except.h $(EXPR_H) ssa.h $(GGC_H) $(TM_P_H)

5
gcc/doc/invoke.texi
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@ -3851,6 +3851,11 @@ If an function contains more than this many instructions, it
will not be inlined. This option is precisely equivalent to
@option{-finline-limit}.
@item max-unrolled-insns
The maximum number of instructions that a loop should have if that loop
is unrolled, and if the loop is unrolled, it determines how many times
the loop code is unrolled.
@end table
@end table

7
gcc/params.def
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@ -89,6 +89,13 @@ DEFPARAM(PARAM_MAX_GCSE_PASSES,
"max-gcse-passes",
"The maximum number of passes to make when doing GCSE",
1)
/* This parameter limits the number of insns in a loop that will be unrolled,
and by how much the loop is unrolled. */
DEFPARAM(PARAM_MAX_UNROLLED_INSNS,
"max-unrolled-insns",
"The maximum number of instructions to consider to unroll in a loop",
100)
/*
Local variables:
mode:c

2
gcc/params.h
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@ -96,4 +96,6 @@ typedef enum compiler_param
((size_t) PARAM_VALUE (PARAM_MAX_GCSE_MEMORY))
#define MAX_GCSE_PASSES \
PARAM_VALUE (PARAM_MAX_GCSE_PASSES)
#define MAX_UNROLLED_INSNS \
PARAM_VALUE (PARAM_MAX_UNROLLED_INSNS)
#endif /* ! GCC_PARAMS_H */

8
gcc/unroll.c
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@ -147,6 +147,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
#include "hard-reg-set.h"
#include "basic-block.h"
#include "predict.h"
#include "params.h"
/* The prime factors looked for when trying to unroll a loop by some
number which is modulo the total number of iterations. Just checking
@ -169,13 +170,6 @@ enum unroll_types
UNROLL_NAIVE
};
/* This controls which loops are unrolled, and by how much we unroll
them. */
#ifndef MAX_UNROLLED_INSNS
#define MAX_UNROLLED_INSNS 100
#endif
/* Indexed by register number, if non-zero, then it contains a pointer
to a struct induction for a DEST_REG giv which has been combined with
one of more address givs. This is needed because whenever such a DEST_REG