[PowerPC][Altivec][Clang] Check compile-time constant for vec_dst*
Summary:
This is follow up of https://reviews.llvm.org/D66699.
We might get ISEL ICE if we call vec_dss with non const 3rd arg.
```
Cannot select: intrinsic %llvm.ppc.altivec.dst
```
We should check the constraints in clang and generate better error
messages.
Reviewers: nemanjai, hfinkel, echristo, #powerpc, wuzish
Reviewed By: #powerpc, wuzish
Subscribers: wuzish, kbarton, MaskRay, shchenz, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D66748
llvm-svn: 370912
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index bb06517..b060ec7 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -3231,6 +3231,11 @@
case PPC::BI__builtin_tabortdci:
return SemaBuiltinConstantArgRange(TheCall, 0, 0, 31) ||
SemaBuiltinConstantArgRange(TheCall, 2, 0, 31);
+ case PPC::BI__builtin_altivec_dst:
+ case PPC::BI__builtin_altivec_dstt:
+ case PPC::BI__builtin_altivec_dstst:
+ case PPC::BI__builtin_altivec_dststt:
+ return SemaBuiltinConstantArgRange(TheCall, 2, 0, 3);
case PPC::BI__builtin_vsx_xxpermdi:
case PPC::BI__builtin_vsx_xxsldwi:
return SemaBuiltinVSX(TheCall);