[PATCH] D44381: [mips] Prevent PIC to be set to level 2

[Aleksandar Beserminji via Phabricator via cfe-commits]

abeserminji updated this revision to Diff 142406.
abeserminji marked an inline comment as done.
abeserminji edited the summary of this revision.
abeserminji added a comment.

Comments resolved.


Repository:
  rC Clang

https://reviews.llvm.org/D44381

Files:
  lib/Driver/ToolChains/CommonArgs.cpp
  test/Driver/pic.c


Index: test/Driver/pic.c
===================================================================
--- test/Driver/pic.c
+++ test/Driver/pic.c
@@ -292,9 +292,9 @@
 // RUN: %clang -c %s -target mipsel-linux-android14 -### 2>&1 \
 // RUN:   | FileCheck %s --check-prefix=CHECK-PIC1
 // RUN: %clang -c %s -target mipsel-linux-android16 -### 2>&1 \
-// RUN:   | FileCheck %s --check-prefix=CHECK-PIE2
+// RUN:   | FileCheck %s --check-prefix=CHECK-PIE1
 // RUN: %clang -c %s -target mipsel-linux-android24 -### 2>&1 \
-// RUN:   | FileCheck %s --check-prefix=CHECK-PIE2
+// RUN:   | FileCheck %s --check-prefix=CHECK-PIE1
 //
 // 64-bit Android targets are always PIE.
 // RUN: %clang -c %s -target aarch64-linux-android -### 2>&1 \
Index: lib/Driver/ToolChains/CommonArgs.cpp
===================================================================
--- lib/Driver/ToolChains/CommonArgs.cpp
+++ lib/Driver/ToolChains/CommonArgs.cpp
@@ -1007,12 +1007,17 @@
   if ((ROPI || RWPI) && (PIC || PIE))
     ToolChain.getDriver().Diag(diag::err_drv_ropi_rwpi_incompatible_with_pic);
 
-  // When targettng MIPS64 with N64, the default is PIC, unless -mno-abicalls is
-  // used.
-  if ((Triple.getArch() == llvm::Triple::mips64 ||
-       Triple.getArch() == llvm::Triple::mips64el) &&
-      Args.hasArg(options::OPT_mno_abicalls))
-    return std::make_tuple(llvm::Reloc::Static, 0U, false);
+  if (Triple.getArch() == llvm::Triple::mips ||
+       Triple.getArch() == llvm::Triple::mipsel ||
+       Triple.getArch() == llvm::Triple::mips64 ||
+       Triple.getArch() == llvm::Triple::mips64el) {
+    // When targettng MIPS with -mno-abicalls, it's always static.
+    if(Args.hasArg(options::OPT_mno_abicalls))
+      return std::make_tuple(llvm::Reloc::Static, 0U, false);
+    // Unlike other architectures, MIPS, even with -fPIC/-mxgot/multigot,
+    // does not use PIC level 2 for historical reasons.
+    IsPICLevelTwo = false;
+  }
 
   if (PIC)
     return std::make_tuple(llvm::Reloc::PIC_, IsPICLevelTwo ? 2U : 1U, PIE);


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