On 18/04/16 15:33, Claudiu Zissulescu wrote:
The combine pass may conclude umulhisi3_imm pattern can accept also sign
extended 16-bit constants. This patch prohibits the combine in considering
this pattern as suitable.
OK to apply?
Claudiu
gcc/
2016-04-18 Claudiu Zissulescu <claz...@synopsys.com>
* config/arc/arc.md (umulhisi3_imm): Avoid unwanted match for sign
extend 16-bit constants.
...
* testsuite/gcc.target/arc/umulsihi3_z.c: New file.
- (match_operand:HI 2 "short_const_int_operand" " L,
L,I,C16,C16")))]
+ (match_operand:HI 2 "short_const_int_operand" " L,
L,I,C16,C16")))
+ (use (match_dup 2))]
That's not the way to fix it. Get the predicates and constraints right.
