[PATCH] D159145: [RISCV] Don't add -unaligned-scalar-mem to target features by default.

[Craig Topper via Phabricator via cfe-commits]

craig.topper updated this revision to Diff 554561.
craig.topper added a comment.

Remove change to sifive-x280.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D159145/new/

https://reviews.llvm.org/D159145

Files:
  clang/lib/Driver/ToolChains/Arch/RISCV.cpp
  clang/test/Driver/riscv-default-features.c
  clang/test/Driver/riscv-features.c


Index: clang/test/Driver/riscv-features.c
===================================================================
--- clang/test/Driver/riscv-features.c
+++ clang/test/Driver/riscv-features.c
@@ -39,8 +39,6 @@
 // NO-UNALIGNED-SCALAR-MEM: "-target-feature" "-unaligned-scalar-mem"
 // UNALIGNED-VECTOR-MEM: "-target-feature" "+unaligned-vector-mem"
 // NO-UNALIGNED-VECTOR-MEM: "-target-feature" "-unaligned-vector-mem"
-// DEFAULT: "-target-feature" "-unaligned-scalar-mem"
-// DEFAULT-NOT: "-target-feature" "+unaligned-scalar-mem"
 
 // RUN: %clang --target=riscv32-linux -### %s -fsyntax-only 2>&1 \
 // RUN:   | FileCheck %s -check-prefix=DEFAULT-LINUX
Index: clang/test/Driver/riscv-default-features.c
===================================================================
--- clang/test/Driver/riscv-default-features.c
+++ clang/test/Driver/riscv-default-features.c
@@ -3,10 +3,8 @@
 
 // RV32: "target-features"="+32bit,+a,+c,+m,+relax,
 // RV32-SAME: -save-restore
-// RV32-SAME: -unaligned-scalar-mem
 // RV64: "target-features"="+64bit,+a,+c,+m,+relax,
 // RV64-SAME: -save-restore
-// RV64-SAME: -unaligned-scalar-mem
 
 // Dummy function
 int foo(void){
Index: clang/lib/Driver/ToolChains/Arch/RISCV.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Arch/RISCV.cpp
+++ clang/lib/Driver/ToolChains/Arch/RISCV.cpp
@@ -169,15 +169,17 @@
 
   // -mno-unaligned-access is default, unless -munaligned-access is specified.
   bool HasV = llvm::is_contained(Features, "+zve32x");
-  if (Args.hasFlag(options::OPT_munaligned_access,
-                   options::OPT_mno_unaligned_access, false)) {
-    Features.push_back("+unaligned-scalar-mem");
-    if (HasV)
-      Features.push_back("+unaligned-vector-mem");
-  } else {
-    Features.push_back("-unaligned-scalar-mem");
-    if (HasV)
-      Features.push_back("-unaligned-vector-mem");
+  if (const Arg *A = Args.getLastArg(options::OPT_munaligned_access,
+                                     options::OPT_mno_unaligned_access)) {
+    if (A->getOption().matches(options::OPT_munaligned_access)) {
+      Features.push_back("+unaligned-scalar-mem");
+      if (HasV)
+        Features.push_back("+unaligned-vector-mem");
+    } else {
+      Features.push_back("-unaligned-scalar-mem");
+      if (HasV)
+        Features.push_back("-unaligned-vector-mem");
+    }
   }
 
   // Now add any that the user explicitly requested on the command line,


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