LLD: Add -mllvm flag to the MinGW driver.

martell · martell · commit 0d17638b8929 · 2017-09-11T21:36:37.000Z
This adds support for passing LTO flags to the MINGW driver in GNU LD style i.e. -mllvm flag -> /mllvm:flag Reviewers: ruiu, mstorsjo Differential Revision: https://reviews.llvm.org/D37712 llvm-svn: 312956
diff --git a/lld/MinGW/Driver.cpp b/lld/MinGW/Driver.cpp
@@ -160,6 +160,9 @@ bool link(ArrayRef<const char *> ArgsArr, raw_ostream &Diag) {
       error("unknown parameter: -m" + S);
   }
 
+  for (auto *A : Args.filtered(OPT_mllvm))
+    Add("-mllvm:" + StringRef(A->getValue()));
+
   if (Args.getLastArgValue(OPT_m) == "i386pe")
     Add("-alternatename:__image_base__=___ImageBase");
   else
diff --git a/lld/MinGW/Options.td b/lld/MinGW/Options.td
@@ -11,6 +11,7 @@ def entry: S<"entry">, MetaVarName<"<entry>">,
 def l: JoinedOrSeparate<["-"], "l">, MetaVarName<"<libName>">,
   HelpText<"Root name of library to use">;
 def m: JoinedOrSeparate<["-"], "m">, HelpText<"Set target emulation">;
+def mllvm: S<"mllvm">;
 def o: JoinedOrSeparate<["-"], "o">, MetaVarName<"<path>">,
   HelpText<"Path to file to write output">;
 def out_implib: Separate<["--"], "out-implib">, HelpText<"Import library name">;
diff --git a/lld/test/MinGW/lto-debug-pass-arguments.ll b/lld/test/MinGW/lto-debug-pass-arguments.ll
@@ -0,0 +1,16 @@
+; REQUIRES: x86
+; RUN: llvm-as %s -o %t.obj
+; RUN: ld.lld -m i386pep -shared -o %t.dll %t.obj -mllvm -debug-pass=Arguments 2>&1 | FileCheck %s
+
+target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-pc-windows-gnu"
+
+define void @dummy() {
+  ret void
+}
+
+define void @_DllMainCRTStartup() {
+  ret void
+}
+
+; CHECK: Pass Arguments:

Original file line number	Diff line number	Diff line change
`@@ -160,6 +160,9 @@ bool link(ArrayRef<const char *> ArgsArr, raw_ostream &Diag) {`
`160`	`160`	`error("unknown parameter: -m" + S);`
`161`	`161`	`}`
`162`	`162`
	`163`	`+ for (auto *A : Args.filtered(OPT_mllvm))`
	`164`	`+ Add("-mllvm:" + StringRef(A->getValue()));`
	`165`	`+`
`163`	`166`	`if (Args.getLastArgValue(OPT_m) == "i386pe")`
`164`	`167`	`Add("-alternatename:__image_base__=___ImageBase");`
`165`	`168`	`else`