Revert "Reapply "[OpenMP][OMPX] Add shfl_down_sync (llvm#93311)""

This reverts commit 7b48655.

Author: shiltian

offload/DeviceRTL/include/Utils.h

@@ -25,8 +25,6 @@ int32_t shuffle(uint64_t Mask, int32_t Var, int32_t SrcLane);
 
 int32_t shuffleDown(uint64_t Mask, int32_t Var, uint32_t Delta, int32_t Width);
 
-int64_t shuffleDown(uint64_t Mask, int64_t Var, uint32_t Delta, int32_t Width);
-
 uint64_t ballotSync(uint64_t Mask, int32_t Pred);
 
 /// Return \p LowBits and \p HighBits packed into a single 64 bit value.

offload/DeviceRTL/src/Mapping.cpp

@@ -364,30 +364,8 @@ _TGT_KERNEL_LANGUAGE(block_id, getBlockIdInKernel)
 _TGT_KERNEL_LANGUAGE(block_dim, getNumberOfThreadsInBlock)
 _TGT_KERNEL_LANGUAGE(grid_dim, getNumberOfBlocksInKernel)
 
-extern "C" {
-uint64_t ompx_ballot_sync(uint64_t mask, int pred) {
+extern "C" uint64_t ompx_ballot_sync(uint64_t mask, int pred) {
   return utils::ballotSync(mask, pred);
 }
 
-int ompx_shfl_down_sync_i(uint64_t mask, int var, unsigned delta, int width) {
-  return utils::shuffleDown(mask, var, delta, width);
-}
-
-float ompx_shfl_down_sync_f(uint64_t mask, float var, unsigned delta,
-                            int width) {
-  return utils::convertViaPun<float>(utils::shuffleDown(
-      mask, utils::convertViaPun<int32_t>(var), delta, width));
-}
-
-long ompx_shfl_down_sync_l(uint64_t mask, long var, unsigned delta, int width) {
-  return utils::shuffleDown(mask, var, delta, width);
-}
-
-double ompx_shfl_down_sync_d(uint64_t mask, double var, unsigned delta,
-                             int width) {
-  return utils::convertViaPun<double>(utils::shuffleDown(
-      mask, utils::convertViaPun<int64_t>(var), delta, width));
-}
-}
-
 #pragma omp end declare target

offload/DeviceRTL/src/Utils.cpp

@@ -113,15 +113,6 @@ int32_t utils::shuffleDown(uint64_t Mask, int32_t Var, uint32_t Delta,
   return impl::shuffleDown(Mask, Var, Delta, Width);
 }
 
-int64_t utils::shuffleDown(uint64_t Mask, int64_t Var, uint32_t Delta,
-                           int32_t Width) {
-  uint32_t Lo, Hi;
-  utils::unpack(Var, Lo, Hi);
-  Hi = impl::shuffleDown(Mask, Hi, Delta, Width);
-  Lo = impl::shuffleDown(Mask, Lo, Delta, Width);
-  return utils::pack(Lo, Hi);
-}
-
 uint64_t utils::ballotSync(uint64_t Mask, int32_t Pred) {
   return impl::ballotSync(Mask, Pred);
 }
@@ -134,7 +125,11 @@ int32_t __kmpc_shuffle_int32(int32_t Val, int16_t Delta, int16_t SrcLane) {
 }
 
 int64_t __kmpc_shuffle_int64(int64_t Val, int16_t Delta, int16_t Width) {
-  return utils::shuffleDown(lanes::All, Val, Delta, Width);
+  uint32_t lo, hi;
+  utils::unpack(Val, lo, hi);
+  hi = impl::shuffleDown(lanes::All, hi, Delta, Width);
+  lo = impl::shuffleDown(lanes::All, lo, Delta, Width);
+  return utils::pack(lo, hi);
 }
 }
 

offload/test/offloading/ompx_bare_shfl_down_sync.cpp

@@ -9,12 +9,6 @@
 #ifndef __OMPX_H
 #define __OMPX_H
 
-#ifdef __AMDGCN_WAVEFRONT_SIZE
-#define __WARP_SIZE __AMDGCN_WAVEFRONT_SIZE
-#else
-#define __WARP_SIZE 32
-#endif
-
 typedef unsigned long uint64_t;
 
 #ifdef __cplusplus
@@ -81,44 +75,28 @@ _TGT_KERNEL_LANGUAGE_HOST_IMPL_GRID_C(grid_dim, 1)
   static inline RETTY ompx_##NAME(ARGS) { BODY; }
 
 _TGT_KERNEL_LANGUAGE_HOST_IMPL_SYNC_C(void, sync_block, int Ordering,
-                                      _Pragma("omp barrier"))
+                                      _Pragma("omp barrier"));
 _TGT_KERNEL_LANGUAGE_HOST_IMPL_SYNC_C(void, sync_block_acq_rel, void,
-                                      ompx_sync_block(ompx_acq_rel))
+                                      ompx_sync_block(ompx_acq_rel));
 _TGT_KERNEL_LANGUAGE_HOST_IMPL_SYNC_C(void, sync_block_divergent, int Ordering,
-                                      ompx_sync_block(Ordering))
+                                      ompx_sync_block(Ordering));
 #undef _TGT_KERNEL_LANGUAGE_HOST_IMPL_SYNC_C
 ///}
 
 static inline uint64_t ompx_ballot_sync(uint64_t mask, int pred) {
   __builtin_trap();
 }
 
-/// ompx_shfl_down_sync_{i,f,l,d}
-///{
-#define _TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC_HOST_IMPL(TYPE, TY)                \
-  static inline TYPE ompx_shfl_down_sync_##TY(uint64_t mask, TYPE var,         \
-                                              unsigned delta, int width) {     \
-    __builtin_trap();                                                          \
-  }
-
-_TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC_HOST_IMPL(int, i)
-_TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC_HOST_IMPL(float, f)
-_TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC_HOST_IMPL(long, l)
-_TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC_HOST_IMPL(double, d)
-
-#undef _TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC_HOST_IMPL
-///}
-
 #pragma omp end declare variant
 
 /// ompx_{sync_block}_{,divergent}
 ///{
 #define _TGT_KERNEL_LANGUAGE_DECL_SYNC_C(RETTY, NAME, ARGS)         \
   RETTY ompx_##NAME(ARGS);
 
-_TGT_KERNEL_LANGUAGE_DECL_SYNC_C(void, sync_block, int Ordering)
-_TGT_KERNEL_LANGUAGE_DECL_SYNC_C(void, sync_block_acq_rel, void)
-_TGT_KERNEL_LANGUAGE_DECL_SYNC_C(void, sync_block_divergent, int Ordering)
+_TGT_KERNEL_LANGUAGE_DECL_SYNC_C(void, sync_block, int Ordering);
+_TGT_KERNEL_LANGUAGE_DECL_SYNC_C(void, sync_block_acq_rel, void);
+_TGT_KERNEL_LANGUAGE_DECL_SYNC_C(void, sync_block_divergent, int Ordering);
 #undef _TGT_KERNEL_LANGUAGE_DECL_SYNC_C
 ///}
 
@@ -139,20 +117,6 @@ _TGT_KERNEL_LANGUAGE_DECL_GRID_C(grid_dim)
 
 uint64_t ompx_ballot_sync(uint64_t mask, int pred);
 
-/// ompx_shfl_down_sync_{i,f,l,d}
-///{
-#define _TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC(TYPE, TY)                          \
-  TYPE ompx_shfl_down_sync_##TY(uint64_t mask, TYPE var, unsigned delta,       \
-                                int width);
-
-_TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC(int, i)
-_TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC(float, f)
-_TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC(long, l)
-_TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC(double, d)
-
-#undef _TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC
-///}
-
 #ifdef __cplusplus
 }
 #endif
@@ -198,32 +162,16 @@ _TGT_KERNEL_LANGUAGE_HOST_IMPL_GRID_CXX(grid_dim)
   }
 
 _TGT_KERNEL_LANGUAGE_HOST_IMPL_SYNC_CXX(void, sync_block, int Ordering = acc_rel,
-                                        Ordering)
+                                        Ordering);
 _TGT_KERNEL_LANGUAGE_HOST_IMPL_SYNC_CXX(void, sync_block_divergent,
-                                        int Ordering = acc_rel, Ordering)
+                                        int Ordering = acc_rel, Ordering);
 #undef _TGT_KERNEL_LANGUAGE_HOST_IMPL_SYNC_CXX
 ///}
 
 static inline uint64_t ballot_sync(uint64_t mask, int pred) {
   return ompx_ballot_sync(mask, pred);
 }
 
-/// shfl_down_sync
-///{
-#define _TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC(TYPE, TY)                          \
-  static inline TYPE shfl_down_sync(uint64_t mask, TYPE var, unsigned delta,   \
-                                    int width = __WARP_SIZE) {                 \
-    return ompx_shfl_down_sync_##TY(mask, var, delta, width);                  \
-  }
-
-_TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC(int, i)
-_TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC(float, f)
-_TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC(long, l)
-_TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC(double, d)
-
-#undef _TGT_KERNEL_LANGUAGE_SHFL_DOWN_SYNC
-///}
-
 } // namespace ompx
 #endif