[clang] cc14de8 - [CUDA] Fix order of memcpy arguments in __shfl_*(<64-bit type>).

[Artem Belevich via cfe-commits]

Author: Artem Belevich
Date: 2020-01-23T13:17:52-08:00
New Revision: cc14de88da27a8178976972bdc8211c31f7ca9ae

URL: https://github.com/llvm/llvm-project/commit/cc14de88da27a8178976972bdc8211c31f7ca9ae
DIFF: https://github.com/llvm/llvm-project/commit/cc14de88da27a8178976972bdc8211c31f7ca9ae.diff

LOG: [CUDA] Fix order of memcpy arguments in __shfl_*(<64-bit type>).

Wrong argument order resulted in broken shfl ops for 64-bit types.

Added: 
    

Modified: 
    clang/lib/Headers/__clang_cuda_intrinsics.h

Removed: 
    


################################################################################
diff  --git a/clang/lib/Headers/__clang_cuda_intrinsics.h b/clang/lib/Headers/__clang_cuda_intrinsics.h
index b67461a146fc..c7bff6a9d8fe 100644
--- a/clang/lib/Headers/__clang_cuda_intrinsics.h
+++ b/clang/lib/Headers/__clang_cuda_intrinsics.h
@@ -45,7 +45,7 @@
     _Static_assert(sizeof(__val) == sizeof(__Bits));                           \
     _Static_assert(sizeof(__Bits) == 2 * sizeof(int));                         \
     __Bits __tmp;                                                              \
-    memcpy(&__val, &__tmp, sizeof(__val));                                     \
+    memcpy(&__tmp, &__val, sizeof(__val));                                \
     __tmp.__a = ::__FnName(__tmp.__a, __offset, __width);                      \
     __tmp.__b = ::__FnName(__tmp.__b, __offset, __width);                      \
     long long __ret;                                                           \
@@ -129,7 +129,7 @@ __MAKE_SHUFFLES(__shfl_xor, __nvvm_shfl_bfly_i32, __nvvm_shfl_bfly_f32, 0x1f,
     _Static_assert(sizeof(__val) == sizeof(__Bits));                           \
     _Static_assert(sizeof(__Bits) == 2 * sizeof(int));                         \
     __Bits __tmp;                                                              \
-    memcpy(&__val, &__tmp, sizeof(__val));                                     \
+    memcpy(&__tmp, &__val, sizeof(__val));                                     \
     __tmp.__a = ::__FnName(__mask, __tmp.__a, __offset, __width);              \
     __tmp.__b = ::__FnName(__mask, __tmp.__b, __offset, __width);              \
     long long __ret;                                                           \