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| author | Jeffrey A Law <law@cygnus.com> | 1998-07-08 23:37:50 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1998-07-08 17:37:50 -0600 |
| commit | 752e74f910cfe9bacbca383e5ea87e7f39c0e00f (patch) | |
| tree | 5bd953a50a849d4e66717c40dff62db5fd8aaedd /gcc | |
| parent | a550815273219b4b9281b2ec9fd79e2bb6dc1cca (diff) | |
| download | gcc-752e74f910cfe9bacbca383e5ea87e7f39c0e00f.zip gcc-752e74f910cfe9bacbca383e5ea87e7f39c0e00f.tar.gz gcc-752e74f910cfe9bacbca383e5ea87e7f39c0e00f.tar.bz2 | |
jump.c (duplicate_loop_exit_test): Do not duplicate the loop exit test if the exit code has an insn with ASM_OPERANDS.
* jump.c (duplicate_loop_exit_test): Do not duplicate the loop exit
test if the exit code has an insn with ASM_OPERANDS.
From-SVN: r21017
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 3 | ||||
| -rw-r--r-- | gcc/jump.c | 8 |
2 files changed, 10 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5675c37..31ed342 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,8 @@ Wed Jul 8 21:43:14 1998 Jeffrey A Law (law@cygnus.com) + * jump.c (duplicate_loop_exit_test): Do not duplicate the loop exit + test if the exit code has an insn with ASM_OPERANDS. + * i386/cygwin32.h (STDIO_PROTO): Fix typo. * m32r.h (STDIO_PROTO): Fix typo. @@ -2380,6 +2380,11 @@ duplicate_loop_exit_test (loop_start) is a NOTE_INSN_LOOP_BEG because this means we have a nested loop is a NOTE_INSN_BLOCK_{BEG,END} because duplicating these notes are not valid + + + We also do not do this if we find an insn with ASM_OPERANDS. While + this restriction should not be necessary, copying an insn with + ASM_OPERANDS can confuse asm_noperands in some cases. Also, don't do this if the exit code is more than 20 insns. */ @@ -2422,7 +2427,8 @@ duplicate_loop_exit_test (loop_start) case INSN: if (++num_insns > 20 || find_reg_note (insn, REG_RETVAL, NULL_RTX) - || find_reg_note (insn, REG_LIBCALL, NULL_RTX)) + || find_reg_note (insn, REG_LIBCALL, NULL_RTX) + || asm_noperands (PATTERN (insn))) return 0; break; default: |