diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/combine.c | 3 |
2 files changed, 7 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 46b023e..1cd2404 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2016-11-23 Segher Boessenkool <segher@kernel.crashing.org> + + * combine.c (change_zero_ext): Only change the mode of a hard register + destination if can_change_dest_mode holds for that. + 2016-11-23 Jeff Law <law@redhat.com> * varasm.c (assemble_name): Increase buffer size for name. diff --git a/gcc/combine.c b/gcc/combine.c index ae25ef3..ce6cfde 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -11230,7 +11230,8 @@ change_zero_ext (rtx pat) else if (GET_CODE (x) == ZERO_EXTEND && SCALAR_INT_MODE_P (mode) && REG_P (XEXP (x, 0)) - && HARD_REGISTER_P (XEXP (x, 0))) + && HARD_REGISTER_P (XEXP (x, 0)) + && can_change_dest_mode (XEXP (x, 0), 0, mode)) { size = GET_MODE_PRECISION (GET_MODE (XEXP (x, 0))); x = gen_rtx_REG (mode, REGNO (XEXP (x, 0))); |