Add out-of-line-atomics support to GlobalISel (#74588)

This patch implement the GlobalISel counterpart to
4d7df43ffdb460dddb2877a886f75f45c3fee188.

1 files changed, 26 insertions, 15 deletions

diff --git a/llvm/lib/CodeGen/TargetLoweringBase.cpp b/llvm/lib/CodeGen/TargetLoweringBase.cpp
index 2648c16..acbbfd9 100644
--- a/llvm/lib/CodeGen/TargetLoweringBase.cpp
+++ b/llvm/lib/CodeGen/TargetLoweringBase.cpp
@@ -520,27 +520,28 @@ RTLIB::Libcall RTLIB::getFREXP(EVT RetVT) {
                       FREXP_PPCF128);
 }
 
-RTLIB::Libcall RTLIB::getOUTLINE_ATOMIC(unsigned Opc, AtomicOrdering Order,
-                                        MVT VT) {
+RTLIB::Libcall RTLIB::getOutlineAtomicHelper(const Libcall (&LC)[5][4],
+                                             AtomicOrdering Order,
+                                             uint64_t MemSize) {
   unsigned ModeN, ModelN;
-  switch (VT.SimpleTy) {
-  case MVT::i8:
+  switch (MemSize) {
+  case 1:
     ModeN = 0;
     break;
-  case MVT::i16:
+  case 2:
     ModeN = 1;
     break;
-  case MVT::i32:
+  case 4:
     ModeN = 2;
     break;
-  case MVT::i64:
+  case 8:
     ModeN = 3;
     break;
-  case MVT::i128:
+  case 16:
     ModeN = 4;
     break;
   default:
-    return UNKNOWN_LIBCALL;
+    return RTLIB::UNKNOWN_LIBCALL;
   }
 
   switch (Order) {
@@ -561,6 +562,16 @@ RTLIB::Libcall RTLIB::getOUTLINE_ATOMIC(unsigned Opc, AtomicOrdering Order,
     return UNKNOWN_LIBCALL;
   }
 
+  return LC[ModeN][ModelN];
+}
+
+RTLIB::Libcall RTLIB::getOUTLINE_ATOMIC(unsigned Opc, AtomicOrdering Order,
+                                        MVT VT) {
+  unsigned ModeN, ModelN;
+  if (!VT.isScalarInteger())
+    return UNKNOWN_LIBCALL;
+  uint64_t MemSize = VT.getScalarSizeInBits() / 8;
+
 #define LCALLS(A, B)                                                           \
   { A##B##_RELAX, A##B##_ACQ, A##B##_REL, A##B##_ACQ_REL }
 #define LCALL5(A)                                                              \
@@ -568,27 +579,27 @@ RTLIB::Libcall RTLIB::getOUTLINE_ATOMIC(unsigned Opc, AtomicOrdering Order,
   switch (Opc) {
   case ISD::ATOMIC_CMP_SWAP: {
     const Libcall LC[5][4] = {LCALL5(OUTLINE_ATOMIC_CAS)};
-    return LC[ModeN][ModelN];
+    return getOutlineAtomicHelper(LC, Order, MemSize);
   }
   case ISD::ATOMIC_SWAP: {
     const Libcall LC[5][4] = {LCALL5(OUTLINE_ATOMIC_SWP)};
-    return LC[ModeN][ModelN];
+    return getOutlineAtomicHelper(LC, Order, MemSize);
   }
   case ISD::ATOMIC_LOAD_ADD: {
     const Libcall LC[5][4] = {LCALL5(OUTLINE_ATOMIC_LDADD)};
-    return LC[ModeN][ModelN];
+    return getOutlineAtomicHelper(LC, Order, MemSize);
   }
   case ISD::ATOMIC_LOAD_OR: {
     const Libcall LC[5][4] = {LCALL5(OUTLINE_ATOMIC_LDSET)};
-    return LC[ModeN][ModelN];
+    return getOutlineAtomicHelper(LC, Order, MemSize);
   }
   case ISD::ATOMIC_LOAD_CLR: {
     const Libcall LC[5][4] = {LCALL5(OUTLINE_ATOMIC_LDCLR)};
-    return LC[ModeN][ModelN];
+    return getOutlineAtomicHelper(LC, Order, MemSize);
   }
   case ISD::ATOMIC_LOAD_XOR: {
     const Libcall LC[5][4] = {LCALL5(OUTLINE_ATOMIC_LDEOR)};
-    return LC[ModeN][ModelN];
+    return getOutlineAtomicHelper(LC, Order, MemSize);
   }
   default:
     return UNKNOWN_LIBCALL;