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| author | Dale Johannesen <dalej@apple.com> | 2002-09-05 20:41:11 +0000 |
|---|---|---|
| committer | Dale Johannesen <dalej@gcc.gnu.org> | 2002-09-05 20:41:11 +0000 |
| commit | 41e34bab133b719c014844f0d74248aa14d82394 (patch) | |
| tree | 938f0913c28143dde7571a87afe922d2145e69fc /gcc/reload1.c | |
| parent | dc0ba55a5b813f1f91ca6d472d70de3021e8be9e (diff) | |
| download | gcc-41e34bab133b719c014844f0d74248aa14d82394.zip gcc-41e34bab133b719c014844f0d74248aa14d82394.tar.gz gcc-41e34bab133b719c014844f0d74248aa14d82394.tar.bz2 | |
In reload, retain only those clobbers added for variable-array handling.
From-SVN: r56863
Diffstat (limited to 'gcc/reload1.c')
| -rw-r--r-- | gcc/reload1.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/gcc/reload1.c b/gcc/reload1.c index c00426c..a85d250 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -1180,9 +1180,9 @@ reload (first, global) /* Make a pass over all the insns and delete all USEs which we inserted only to tag a REG_EQUAL note on them. Remove all REG_DEAD and REG_UNUSED - notes. Delete all CLOBBER insns that don't refer to the return value - or to memory (mem:BLK CLOBBERs must be retained to prevent the scheduler - from misarranging variable-array code) and simplify (subreg (reg)) + notes. Delete all CLOBBER insns, except those that refer to the return + value and the special mem:BLK CLOBBERs added to prevent the scheduler + from misarranging variable-array code, and simplify (subreg (reg)) operands. Also remove all REG_RETVAL and REG_LIBCALL notes since they are no longer useful or accurate. Strip and regenerate REG_INC notes that may have been moved around. */ @@ -1203,7 +1203,10 @@ reload (first, global) || find_reg_note (insn, REG_EQUAL, NULL_RTX))) || (GET_CODE (PATTERN (insn)) == CLOBBER && (GET_CODE (XEXP (PATTERN (insn), 0)) != MEM - || GET_MODE (XEXP (PATTERN (insn), 0)) != BLKmode) + || GET_MODE (XEXP (PATTERN (insn), 0)) != BLKmode + || (GET_CODE (XEXP (XEXP (PATTERN (insn), 0), 0)) != SCRATCH + && XEXP (XEXP (PATTERN (insn), 0), 0) + != stack_pointer_rtx)) && (GET_CODE (XEXP (PATTERN (insn), 0)) != REG || ! REG_FUNCTION_VALUE_P (XEXP (PATTERN (insn), 0))))) { |