contrib/gcc/ifcvt.c

73 /* # of IF-THEN or IF-THEN-ELSE blocks we looked at  */
76 /* # of IF-THEN or IF-THEN-ELSE blocks were converted to conditional
472      blocks after the first block containing the test.  */
538   /* For IF-THEN-ELSE blocks, we don't allow modifications of the test
542   /* Go through the THEN and ELSE blocks converting the insns if possible
578   /* Merge the blocks!  */
2385      may have been modified by gcse to be shared across basic blocks.  */
2401   /* Merge the blocks!  */
2509   /* Make sure the blocks are suitable.  */
2514   /* Make sure the blocks can be used together.  If the same register
2515      is set in both blocks, and is not set to a constant in both
2516      cases, then both blocks must set it to the same register.  We
2519      the number of registers set in only one of the blocks.  */
2545      anything left in the else blocks.  */
2680 /* Merge the blocks and mark for local life update.  */
2695   /* Merge any basic blocks to handle && and || subtests.  Each of
2696      the blocks are on the fallthru path from the predecessor block.  */
2753          blocks taking us to our final destination.  */
2763      Since we've already merged the TEST, THEN and ELSE blocks, we should
2988 	  int blocks = 0;
2997 	      blocks++;
3007 	  ce_info->num_multiple_test_blocks = blocks;
3011 	    ce_info->num_and_and_blocks = blocks;
3013 	    ce_info->num_or_or_blocks = blocks;
3018      other than any || blocks which jump to the THEN block.  */
3022   /* The edges of the THEN and ELSE blocks cannot have complex edges.  */
3129   /* Make sure IF, THEN, and ELSE, blocks are adjacent.  Actually, we get the
3131      fallthru edge from IF to THEN.  Likewise for the && and || blocks, since
3363   /* If we are partitioning hot/cold basic blocks, we don't want to
3368      be optimizable (or blocks that appear to be mergeable), but which really
3469   /* If we are partitioning hot/cold basic blocks, we don't want to
3474      be optimizable (or blocks that appear to be mergeable), but which really
3835       /* ??? Can't merge blocks here, as then_bb is still in use.
3879   /* Go through each of the basic blocks looking for things to convert.  If we
3881      IF-THEN{-ELSE} blocks within other IF-THEN{-ELSE} blocks.  */
3919   /* Rebuild life info for basic blocks that require it.  */
3937 	       "\n%d possible IF blocks searched.\n",
3940 	       "%d IF blocks converted.\n",