[GlobalISel] Add Saturated Truncate Instructions (#147526)

Introduces saturated truncate instructions to Global ISel:
G_TRUNC_SSAT_S, G_TRUNC_SSAT_U, G_TRUNC_USAT_U. These were previously
introduced to SDAG to reduce redundant code.

The patch only initially introduces the instruction, a later patch will
follow to add combines and legalization for each instruction.

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/MachineVerifier.cpp b/llvm/lib/CodeGen/MachineVerifier.cpp
index 1099882..01703fe 100644
--- a/llvm/lib/CodeGen/MachineVerifier.cpp
+++ b/llvm/lib/CodeGen/MachineVerifier.cpp
@@ -1424,6 +1424,9 @@ void MachineVerifier::verifyPreISelGenericInstruction(const MachineInstr *MI) {
   case TargetOpcode::G_ZEXT:
   case TargetOpcode::G_ANYEXT:
   case TargetOpcode::G_TRUNC:
+  case TargetOpcode::G_TRUNC_SSAT_S:
+  case TargetOpcode::G_TRUNC_SSAT_U:
+  case TargetOpcode::G_TRUNC_USAT_U:
   case TargetOpcode::G_FPEXT:
   case TargetOpcode::G_FPTRUNC: {
     // Number of operands and presense of types is already checked (and
@@ -1450,6 +1453,9 @@ void MachineVerifier::verifyPreISelGenericInstruction(const MachineInstr *MI) {
         report("Generic extend has destination type no larger than source", MI);
       break;
     case TargetOpcode::G_TRUNC:
+    case TargetOpcode::G_TRUNC_SSAT_S:
+    case TargetOpcode::G_TRUNC_SSAT_U:
+    case TargetOpcode::G_TRUNC_USAT_U:
     case TargetOpcode::G_FPTRUNC:
       if (DstSize >= SrcSize)
         report("Generic truncate has destination type no smaller than source",