Commit 12d548a0 authored Oct 02, 2024 by Pierre-Clément Tosi

cc_baremetal_defaults: Disable SVE

Prevent Clang from generating SVE instructions for compiler targets that
default to enabling the feature (such as ARMv9.2-A; see [1]) as the
baremetal environment might not have SVE available (either due to the HW
not supporting it or the SW not having enabled it).

[1]: https://reviews.llvm.org/D109517

Bug: 364383722
Test: lunch <...>  # Set TARGET_ARCH_VARIANT=armv9-2a
Test: m pvmfw      # Decompile & check for SVE instructions
Change-Id: Ic50d9dc45beb1d04d81e3accaf7fc4fc953ea703

parent d3bd6b48

Android.bp

+10 −0

Original line number	Diff line number	Diff line
		@@ -147,6 +147,16 @@ all_apex_contributions {
		// Framework guests.
		cc_defaults {
		name: "cc_baremetal_defaults",
		arch: {
		arm64: {
		cflags: [
		// Prevent the compiler from optimizing code using SVE, as the
		// baremetal environment might not have configured the hardware.
		"-Xclang -target-feature",
		"-Xclang -sve",
		],
		},
		},
		defaults_visibility: ["//visibility:public"],
		}