re PR middle-end/7153 (bad operands for 'movsbl' error)

        PR optimization/7153
        * regmove.c (optimize_reg_copy_3): Don't optimize if the register
        dies in more than one insn.

From-SVN: r55473

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c17493d255b9880f342638a3b00f64708551b37c..4aa0fc7bfe0171313c7bd122e14caff915a79572 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2002-07-15  Eric Botcazou  <ebotcazou@multimania.com>
+
+       PR optimization/7153
+       * regmove.c (optimize_reg_copy_3): Don't optimize if the register
+       dies in more than one insn.
+
 2002-07-15  Jason Thorpe  <thorpej@wasabisystems.com>
 
        * config/sparc/netbsd-elf.h (TRANSFER_FROM_TRAMPOLINE): Remove.

diff --git a/gcc/regmove.c b/gcc/regmove.c
index 59b1005137ae895d4d90631231e3b7d757409fb1..048cfb60ba22f4c624f836e571b0e0fe0dbdd09f 100644 (file)
--- a/gcc/regmove.c
+++ b/gcc/regmove.c
@@ -664,6 +664,7 @@ optimize_reg_copy_3 (insn, dest, src)
   if (src_no < FIRST_PSEUDO_REGISTER
       || dst_no < FIRST_PSEUDO_REGISTER
       || ! find_reg_note (insn, REG_DEAD, src_reg)
+      || REG_N_DEATHS (src_no) != 1
       || REG_N_SETS (src_no) != 1)
     return;
   for (p = PREV_INSN (insn); p && ! reg_set_p (src_reg, p); p = PREV_INSN (p))