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

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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
This commit is contained in:
Nick Desaulniers 2018-04-26 14:28:07 -07:00 • committed by Tri Vo
commit 8d921693f6
1 changed files with 3 additions and 1 deletions
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4
Makefile
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@ -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