Add copy_rtx call to RTL loop unroller
Richard Sandiford
richard.sandiford@linaro.org
Wed Sep 20 12:27:00 GMT 2017
This is needed if the step is an unshared constant, like many
(const ...)s are. Without this patch, libgfortran would fail
to build for SVE.
Tested on aarch64-linux-gnu, x86_64-linux-gnu and powerpc64le-linus-gnu.
OK to install?
Richard
2017-09-20 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
gcc/
* loop-unroll.c (split_iv): Call copy_rtx on the step.
Index: gcc/loop-unroll.c
===================================================================
--- gcc/loop-unroll.c 2017-08-30 12:13:52.715828832 +0100
+++ gcc/loop-unroll.c 2017-09-20 13:26:14.451718893 +0100
@@ -1731,7 +1731,8 @@ split_iv (struct iv_to_split *ivts, rtx_
else
{
incr = simplify_gen_binary (MULT, mode,
- ivts->step, gen_int_mode (delta, mode));
+ copy_rtx (ivts->step),
+ gen_int_mode (delta, mode));
expr = simplify_gen_binary (PLUS, GET_MODE (ivts->base_var),
ivts->base_var, incr);
}
More information about the Gcc-patches
mailing list