AsmPrinter: Do not use report_fatal_error for unhandled ConstantExpr (llvm#145275)

Author: arsenm

llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp

@@ -3608,10 +3608,11 @@ const MCExpr *AsmPrinter::lowerConstant(const Constant *CV,
   // Otherwise report the problem to the user.
   std::string S;
   raw_string_ostream OS(S);
-  OS << "Unsupported expression in static initializer: ";
+  OS << "unsupported expression in static initializer: ";
   CE->printAsOperand(OS, /*PrintType=*/false,
                      !MF ? nullptr : MF->getFunction().getParent());
-  report_fatal_error(Twine(S));
+  CE->getContext().emitError(S);
+  return MCConstantExpr::create(0, Ctx);
 }
 
 static void emitGlobalConstantImpl(const DataLayout &DL, const Constant *C,

llvm/test/CodeGen/AMDGPU/addrspacecast-initializer-unsupported.ll

@@ -1,6 +1,12 @@
-; RUN: not --crash llc -mtriple=amdgcn -verify-machineinstrs -amdgpu-enable-lower-module-lds=false < %s 2>&1 | FileCheck -check-prefix=ERROR %s
+; RUN: not llc -mtriple=amdgcn -verify-machineinstrs -amdgpu-enable-lower-module-lds=false < %s 2> %t.err | FileCheck %s
+; RUN: FileCheck -check-prefix=ERROR %s < %t.err
+
+; ERROR: error: unsupported expression in static initializer: addrspacecast (ptr addrspace(3) @lds.arr to ptr addrspace(4))
+
+; CHECK: gv_flatptr_from_lds:
+; CHECK-NEXT: .quad 0+32
+; CHECK-NEXT: .size gv_flatptr_from_lds, 8
 
-; ERROR: LLVM ERROR: Unsupported expression in static initializer: addrspacecast (ptr addrspace(3) @lds.arr to ptr addrspace(4))
 
 @lds.arr = unnamed_addr addrspace(3) global [256 x i32] poison, align 4
 

llvm/test/CodeGen/X86/ptrtoint-constexpr-invalid.ll

@@ -1,10 +1,10 @@
-; RUN: not --crash llc < %s -mtriple=i386-linux 2>&1 | FileCheck %s
+; RUN: not llc < %s -mtriple=i386-linux 2>&1 | FileCheck %s
 
 ; ptrtoint expressions that cast to a wider integer type are not supported.
 ; A frontend can achieve a similar result by casting to the correct integer
 ; type and explicitly zeroing any additional bytes.
 ; { i32, i32 } { i32 ptrtoint (ptr @r to i32), i32 0 }
 
-; CHECK: LLVM ERROR: Unsupported expression in static initializer: ptrtoint (ptr @r to i64)
+; CHECK: error: unsupported expression in static initializer: ptrtoint (ptr @r to i64)
 
 @r = global i64 ptrtoint (ptr @r to i64)