diff options
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 41f69da..22fb7a9 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -11251,11 +11251,13 @@ change_zero_ext (rtx pat) else if (GET_CODE (x) == ZERO_EXTEND && SCALAR_INT_MODE_P (mode) && GET_CODE (XEXP (x, 0)) == SUBREG - && GET_MODE (SUBREG_REG (XEXP (x, 0))) == mode + && !paradoxical_subreg_p (XEXP (x, 0)) && subreg_lowpart_p (XEXP (x, 0))) { size = GET_MODE_PRECISION (GET_MODE (XEXP (x, 0))); x = SUBREG_REG (XEXP (x, 0)); + if (GET_MODE (x) != mode) + x = gen_lowpart_SUBREG (mode, x); } else if (GET_CODE (x) == ZERO_EXTEND && SCALAR_INT_MODE_P (mode) |