riscv64: Let dex2oat run in verification mode (disable compilation).

There is no compiler support for RISC-V yet, but dex2oat can perform
verification and compile boot images and app images as though it was
running with compiler filter "verify". This allows us to re-enable
dexpreopt and speed up the first boot, as there is no need to verify
all the apps on device.

The change is done purely in ART by adding a workaround to turn off
compilation completely on RISC-V, as opposed to setting compiler filter
"verify" in the build system (e.g, we still keep compiler filter
"speed-profile" for boot images in RISC-V). This approach is chosen so
that fewer modifications are needed when adding compiler support.

Bug: b/271573990
Test: `lunch aosp_riscv64-userdebug && m`
      (with cherry-picked https://r.android.com/2511036)
Change-Id: If5dd798d043edc0c0ed321ad2ef5b841e68efe0f

1 files changed, 3 insertions, 1 deletions

diff --git a/compiler/driver/compiler_options.h b/compiler/driver/compiler_options.h
index 74d081d29e..c8a41ce24b 100644
--- a/compiler/driver/compiler_options.h
+++ b/compiler/driver/compiler_options.h
@@ -115,7 +115,9 @@ class CompilerOptions final {
   }
 
   bool IsAnyCompilationEnabled() const {
-    return CompilerFilter::IsAnyCompilationEnabled(compiler_filter_);
+    return CompilerFilter::IsAnyCompilationEnabled(compiler_filter_) &&
+           // TODO(riscv64): remove this when we have compiler support for RISC-V
+           GetInstructionSet() != InstructionSet::kRiscv64;
   }
 
   size_t GetHugeMethodThreshold() const {