From de907943a5e2c5c869c6af7cf7578e52172bc733 Mon Sep 17 00:00:00 2001 From: Richard Sandiford Date: Thu, 17 Apr 2008 20:20:13 +0000 Subject: [PATCH] re PR rtl-optimization/35838 (FAIL: 22_locale/num_get/get/char/16.cc execution test, and 76 others) gcc/ PR rtl-optimization/35838 * dse.c (find_shift_sequence): Use subreg_lowpart_offset to work out the byte offset of the first subreg. From-SVN: r134411 --- gcc/ChangeLog | 6 ++++++ gcc/dse.c | 5 +++-- 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 89983b940d3..9e5fcfa4f81 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2008-04-17 Richard Sandiford + + PR rtl-optimization/35838 + * dse.c (find_shift_sequence): Use subreg_lowpart_offset to work + out the byte offset of the first subreg. + 2008-04-17 Uros Bizjak * config/i386/i386.md (addti3 splitter): Pass arrays of 3 operands diff --git a/gcc/dse.c b/gcc/dse.c index 9dab6259c17..9d19b7071ee 100644 --- a/gcc/dse.c +++ b/gcc/dse.c @@ -1446,7 +1446,7 @@ find_shift_sequence (int access_size, new_mode = GET_MODE_WIDER_MODE (new_mode)) { rtx target, new_reg, shift_seq, insn, new_lhs; - int cost; + int cost, offset; /* Try a wider mode if truncating the store mode to NEW_MODE requires a real instruction. */ @@ -1460,8 +1460,9 @@ find_shift_sequence (int access_size, if (!CONSTANT_P (store_info->rhs) && !MODES_TIEABLE_P (new_mode, store_mode)) continue; + offset = subreg_lowpart_offset (new_mode, store_mode); new_lhs = simplify_gen_subreg (new_mode, copy_rtx (store_info->rhs), - store_mode, 0); + store_mode, offset); if (new_lhs == NULL_RTX) continue; -- 2.30.2