Commit 8d921693 authored Apr 26, 2018 by Nick Desaulniers Committed by Tri Vo May 23, 2019

BACKPORT: kbuild: gcov: enable -fno-tree-loop-im if supported



Clang does not recognize this compiler option.

Reported-by: Prasad Sodagudi <psodagud@codeaurora.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
(cherry picked from commit c64ba044ed57ea72cc1c7b14a8dcfb6ded5a759c)
Bug: 122733725
Test: defconfig + CONFIG_GCOV_KERNEL records coverage

Change-Id: I334ebf83a9209d1e4a3e29ee12279f36f7afecdd

parent 8e2c08d1

Makefile

+3 −1

Original line number	Diff line number	Diff line
		@@ -636,7 +636,9 @@ all: vmlinux

		KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
		KBUILD_AFLAGS += $(call cc-option,-fno-PIE)
		CFLAGS_GCOV := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,)
		CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \
		$(call cc-option,-fno-tree-loop-im) \
		$(call cc-disable-warning,maybe-uninitialized,)
		CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,)
		export CFLAGS_GCOV CFLAGS_KCOV