GlobalISel: allow CodeGen to fallback on VReg type/class issues.

After instruction selection we perform some checks on each VReg just before
discarding the type information. These checks were assertions before, but that
breaks the fallback path so this patch moves the logic into the main flow and
reports a better error on failure.

llvm-svn: 286289

1 files changed, 0 insertions, 11 deletions

diff --git a/llvm/lib/CodeGen/MachineRegisterInfo.cpp b/llvm/lib/CodeGen/MachineRegisterInfo.cpp
index 1d6e10acb15..242cb0b8095 100644
--- a/llvm/lib/CodeGen/MachineRegisterInfo.cpp
+++ b/llvm/lib/CodeGen/MachineRegisterInfo.cpp
@@ -143,17 +143,6 @@ MachineRegisterInfo::createGenericVirtualRegister(LLT Ty) {
 }
 
 void MachineRegisterInfo::clearVirtRegTypes() {
-#ifndef NDEBUG
-  // Verify that the size of the now-constrained vreg is unchanged.
-  for (auto &VRegToType : getVRegToType()) {
-    auto *RC = getRegClass(VRegToType.first);
-    if (VRegToType.second.isValid() &&
-        VRegToType.second.getSizeInBits() > (RC->getSize() * 8))
-      llvm_unreachable(
-          "Virtual register has explicit size different from its class size");
-  }
-#endif
-
   getVRegToType().clear();
 }