This one line fix/tweak is the back-end specific change for a fix for
PR target/104489, that allows the ISA for GCC's nvptx backend to be bumped
to sm_53. The machine-independent middle-end pieces were posted here:
https://gcc.gnu.org/pipermail/gcc-patches/2022-February/590139.html
This patch has been tested on nvptx-none hosted on x86_64-pc-linux-gnu,
together with the above middle-end patch and changes identical to those
described by Tom de Vries in the PR, with make and make -k check, where
the build now completes, and there are no regressions in the testsuite.
Ok for mainline?
2022-02-11 Roger Sayle <ro...@nextmovesoftware.com>
gcc/ChangeLog
PR target/104489
* config/nvptx/nvptx.md (*movhf_insn): Add subregs_ok attribute.
Thanks in advance,
Roger
--
diff --git a/gcc/config/nvptx/nvptx.md b/gcc/config/nvptx/nvptx.md
index 92768dd..3f1a4a6 100644
--- a/gcc/config/nvptx/nvptx.md
+++ b/gcc/config/nvptx/nvptx.md
@@ -285,7 +285,8 @@
"@
%.\\tmov.b16\\t%0, %1;
%.\\tld.b16\\t%0, %1;
- %.\\tst.b16\\t%0, %1;")
+ %.\\tst.b16\\t%0, %1;"
+ [(set_attr "subregs_ok" "true")])
(define_expand "movhf"
[(set (match_operand:HF 0 "nonimmediate_operand" "")
