clang driver: enable fast unaligned access for Android on RISCV64 (#8…

…5704) Android CTS test already requires fast unaligned access https://android-review.googlesource.com/c/platform/cts/+/2675633
llvm · Mar 20, 2024 · b20360a · b20360a
1 parent b754e6f
commit b20360a
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Showing 2 changed files with 8 additions and 2 deletions.
diff --git a/clang/lib/Driver/ToolChains/Arch/RISCV.cpp b/clang/lib/Driver/ToolChains/Arch/RISCV.cpp
@@ -167,6 +167,10 @@ void riscv::getRISCVTargetFeatures(const Driver &D, const llvm::Triple &Triple,
     Features.push_back("-relax");
   }
 
+  // Android requires fast unaligned access on RISCV64.
+  if (Triple.isAndroid())
+    Features.push_back("+fast-unaligned-access");
+
   // -mstrict-align is default, unless -mno-strict-align is specified.
   AddTargetFeature(Args, Features, options::OPT_mno_strict_align,
                    options::OPT_mstrict_align, "fast-unaligned-access");

diff --git a/clang/test/Driver/riscv-features.c b/clang/test/Driver/riscv-features.c
@@ -1,7 +1,9 @@
 // RUN: %clang --target=riscv32-unknown-elf -### %s -fsyntax-only 2>&1 | FileCheck %s
 // RUN: %clang --target=riscv64-unknown-elf -### %s -fsyntax-only 2>&1 | FileCheck %s
-// RUN: %clang --target=riscv64-linux-android -### %s -fsyntax-only 2>&1 | FileCheck %s -check-prefixes=ANDROID,DEFAULT
-// RUN: %clang -mabi=lp64d --target=riscv64-linux-android -### %s -fsyntax-only 2>&1 | FileCheck %s -check-prefixes=ANDROID,DEFAULT
+// RUN: %clang --target=riscv64-linux-android -### %s -fsyntax-only 2>&1 | FileCheck %s -check-prefixes=ANDROID,DEFAULT,FAST-UNALIGNED-ACCESS
+// RUN: %clang -mabi=lp64d --target=riscv64-linux-android -### %s -fsyntax-only 2>&1 | FileCheck %s -check-prefixes=ANDROID,DEFAULT,FAST-UNALIGNED-ACCESS
+// RUN: %clang -mabi=lp64d --target=riscv64-linux-android -mstrict-align -### %s -fsyntax-only 2>&1 | FileCheck %s -check-prefixes=NO-FAST-UNALIGNED-ACCESS
+
 
 // CHECK: fno-signed-char