Make LLVM emit assembly comments with -Z asm-comments.

Fixes #35741.
2018-08-12 17:59:18 +00:00
parent 0aa8d03202
commit 66fd1ebfae
3 changed files with 9 additions and 2 deletions
--- a/src/rustllvm/PassWrapper.cpp
+++ b/src/rustllvm/PassWrapper.cpp
@@ -366,7 +366,8 @@ extern "C" LLVMTargetMachineRef LLVMRustCreateTargetMachine(
    bool PositionIndependentExecutable, bool FunctionSections,
    bool DataSections,
    bool TrapUnreachable,
-    bool Singlethread) {
+    bool Singlethread,
+    bool AsmComments) {

  auto OptLevel = fromRust(RustOptLevel);
  auto RM = fromRust(RustReloc);
@@ -393,6 +394,8 @@ extern "C" LLVMTargetMachineRef LLVMRustCreateTargetMachine(
  }
  Options.DataSections = DataSections;
  Options.FunctionSections = FunctionSections;
+  Options.MCOptions.AsmVerbose = AsmComments;
+  Options.MCOptions.PreserveAsmComments = AsmComments;

  if (TrapUnreachable) {
    // Tell LLVM to codegen `unreachable` into an explicit trap instruction.