OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

(stupid_life_analysis): Make sure a function result reg 

is still live if it contains an argument.

From-SVN: r7301
This commit is contained in:
Doug Evans 1994-05-15 01:25:47 +00:00
parent 4d367579cc
commit 56b5e76bfb
1 changed files with 10 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
gcc/stupid.c
View File

@ -199,6 +199,13 @@ stupid_life_analysis (f, nregs, file)
if (regs_live[i])
SET_HARD_REG_BIT (*p, i);
/* Update which hard regs are currently live
and also the birth and death suids of pseudo regs
based on the pattern of this insn. */
if (GET_RTX_CLASS (GET_CODE (insn)) == 'i')
stupid_mark_refs (PATTERN (insn), insn);
/* Mark all call-clobbered regs as live after each call insn
so that a pseudo whose life span includes this insn
will not go in one of them.
@ -215,15 +222,11 @@ stupid_life_analysis (f, nregs, file)
if (call_used_regs[i])
regs_live[i] = 0;
/* It is important that this be done after processing the insn's
pattern because we want the function result register to still
be live if it's also used to pass arguments. */
stupid_mark_refs (CALL_INSN_FUNCTION_USAGE (insn), insn);
}
/* Update which hard regs are currently live
and also the birth and death suids of pseudo regs
based on the pattern of this insn. */
if (GET_RTX_CLASS (GET_CODE (insn)) == 'i')
stupid_mark_refs (PATTERN (insn), insn);
}
/* Now decide the order in which to allocate the pseudo registers. */