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* mips.c (mips_expand_prologue) Add REG_MAYBE_DEAD to

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structure shift insns.

From-SVN: r39848
This commit is contained in:
Richard Henderson
2001-02-18 12:44:44 -08:00
parent 69a59a49f6
commit 71641c15a6
2 changed files with 18 additions and 4 deletions
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7
gcc/ChangeLog
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@@ -1,4 +1,9 @@
2001-02-17 Mark Mitchell <mark@codesourcery.com>
2001-02-18 Shane Nay <shane@agendacomputing.com>
* mips.c (mips_expand_prologue) Add REG_MAYBE_DEAD to
structure shift insns.
2001-02-18 Mark Mitchell <mark@codesourcery.com>
* invoke.texi (-fsquangle): Remove documentation.
(-fname-mangling-version): Likewise.

15
gcc/config/mips/mips.c
View File

@@ -7115,13 +7115,22 @@ mips_expand_prologue ()
for (i = 0; i < num; i++)
{
rtx pattern = RTVEC_ELT (adjust, i);
rtx insn, pattern;
pattern = RTVEC_ELT (adjust, i);
if (GET_CODE (pattern) != SET
|| GET_CODE (SET_SRC (pattern)) != ASHIFT)
abort_with_insn (pattern, "Insn is not a shift");
PUT_CODE (SET_SRC (pattern), ASHIFTRT);
emit_insn (pattern);
insn = emit_insn (pattern);
/* Global life information isn't valid at this point, so we
can't check whether these shifts are actually used. Mark
them MAYBE_DEAD so that flow2 will remove them, and not
complain about dead code in the prologue. */
REG_NOTES(insn) = gen_rtx_EXPR_LIST (REG_MAYBE_DEAD, NULL_RTX,
REG_NOTES (insn));
}
}