[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

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/test/CodeGen/Hexagon/rdf-inline-asm.ll b/llvm/test/CodeGen/Hexagon/rdf-inline-asm.ll
index ae09062638d..2661f8c0d0d 100644
--- a/llvm/test/CodeGen/Hexagon/rdf-inline-asm.ll
+++ b/llvm/test/CodeGen/Hexagon/rdf-inline-asm.ll
@@ -24,7 +24,7 @@ if.end:                                           ; preds = %if.then, %entry
   ret i32 %retval1.0
 }
 
-attributes #0 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="hexagonv60" "target-features"="+hvx,-hvx-double" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #0 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="hexagonv60" "target-features"="+hvx,+hvx-length64b" "unsafe-fp-math"="false" "use-soft-float"="false" }
 attributes #1 = { nounwind }
 
 !1 = !{i32 155}