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| author | Jakub Jelinek <jakub@redhat.com> | 2002-05-26 21:59:45 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2002-05-26 21:59:45 +0200 |
| commit | 9059e33cbbb601ed3a7f36d62a4dc7600b72bc60 (patch) | |
| tree | df164b1544727787f8e9ce42444baca19580849c /gcc/cse.c | |
| parent | 2960ccbf96d50fd7a05568f3e48f88622f965b4b (diff) | |
| download | gcc-9059e33cbbb601ed3a7f36d62a4dc7600b72bc60.zip gcc-9059e33cbbb601ed3a7f36d62a4dc7600b72bc60.tar.gz gcc-9059e33cbbb601ed3a7f36d62a4dc7600b72bc60.tar.bz2 | |
cse.c (fold_rtx): Don't optimize if SUBREG changes mode class.
* cse.c (fold_rtx): Don't optimize if SUBREG changes mode class.
* g++.dg/opt/cse2.C: New test.
From-SVN: r53905
Diffstat (limited to 'gcc/cse.c')
| -rw-r--r-- | gcc/cse.c | 4 |
1 files changed, 3 insertions, 1 deletions
@@ -3472,7 +3472,9 @@ fold_rtx (x, insn) && GET_CODE (elt->exp) != SIGN_EXTEND && GET_CODE (elt->exp) != ZERO_EXTEND && GET_CODE (XEXP (elt->exp, 0)) == SUBREG - && GET_MODE (SUBREG_REG (XEXP (elt->exp, 0))) == mode) + && GET_MODE (SUBREG_REG (XEXP (elt->exp, 0))) == mode + && (GET_MODE_CLASS (mode) + == GET_MODE_CLASS (GET_MODE (XEXP (elt->exp, 0))))) { rtx op0 = SUBREG_REG (XEXP (elt->exp, 0)); |