[Hexagon] New HVX target features.
This patch lets the llvm tools handle the new HVX target features that
are added by frontend (clang). The target-features are of the form
"hvx-length64b" for 64 Byte HVX mode, "hvx-length128b" for 128 Byte mode HVX.
"hvx-double" is an alias to "hvx-length128b" and is soon will be deprecated.
The hvx version target feature is upgated form "+hvx" to "+hvxv{version_number}.
Eg: "+hvxv62"
For the correct HVX code generation, the user must use the following
target features.
For 64B mode: "+hvxv62" "+hvx-length64b"
For 128B mode: "+hvxv62" "+hvx-length128b"
Clang picks a default length if none is specified. If for some reason,
no hvx-length is specified to llvm, the compilation will bail out.
There is a corresponding clang patch.
Differential Revision: https://reviews.llvm.org/D38851
llvm-svn: 316101
diff --git a/llvm/test/CodeGen/Hexagon/vselect-pseudo.ll b/llvm/test/CodeGen/Hexagon/vselect-pseudo.ll
index ef86e47..e6be3ee 100644
--- a/llvm/test/CodeGen/Hexagon/vselect-pseudo.ll
+++ b/llvm/test/CodeGen/Hexagon/vselect-pseudo.ll
@@ -1,4 +1,4 @@
-; RUN: llc -march=hexagon < %s
+; RUN: llc -march=hexagon -mattr="+hvxv60,+hvx-length64b" < %s
; REQUIRES: asserts
target triple = "hexagon"