From 8521b555ae3e956fd76d9de14c59f64ac13bc9a2 Mon Sep 17 00:00:00 2001
From: Lukas Larsson <lukas@erlang.org>
Date: Tue, 26 Sep 2017 10:46:53 +0200
Subject: erts: Add makefile target to check emu register allocation

---
 erts/emulator/Makefile.in | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

(limited to 'erts/emulator/Makefile.in')

diff --git a/erts/emulator/Makefile.in b/erts/emulator/Makefile.in
index 02a9a9a93b..0cf8fee15d 100644
--- a/erts/emulator/Makefile.in
+++ b/erts/emulator/Makefile.in
@@ -499,7 +499,6 @@ ifeq ($(TARGET),win32)
 RELEASE_INCLUDES += sys/$(ERLANG_OSTYPE)/erl_win_dyn_driver.h
 endif
 
-
 .PHONY: release_spec
 ifdef VOID_EMULATOR
 release_spec:
@@ -711,16 +710,27 @@ $(OBJDIR)/beams.$(RES_EXT): $(TARGET)/beams.rc
 
 endif
 
+# We disable the implicit rule of .S -> .o so that the verbose asm
+# generate is not used for compiling erts. This is only a problem on
+# old solaris make
+%.o : %.S
+
 # Usually the same as the default rule, but certain platforms (e.g. win32) mix
 # different compilers
 $(OBJDIR)/beam_emu.o: beam/beam_emu.c
 	$(V_EMU_CC) $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) $(INCLUDES) -c $< -o $@
 
+$(OBJDIR)/beam_emu.S: beam/beam_emu.c
+	$(V_EMU_CC) -S -fverbose-asm $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) $(INCLUDES) -c $< -o $@
+
 $(OBJDIR)/%_pg.o: beam/%.c
 	$(V_CC) $(PROFILE_GENERATE) $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) $(INCLUDES) -c $< -o $@
 $(OBJDIR)/%_pu.o: beam/%.c $(PROFILE_USE_DEPS)
 	$(V_CC) $(PROFILE_USE) $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) $(INCLUDES) -c $< -o $@
 
+$(OBJDIR)/%_pu.S: beam/%.c $(PROFILE_USE_DEPS)
+	$(V_CC) -S -fverbose-asm $(PROFILE_USE) $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) $(INCLUDES) -c $< -o $@
+
 $(OBJDIR)/PROFILE: $(BINDIR)/$(PROFILE_EXECUTABLE)
 	$(V_at)echo " PROFILE ${PROFILE_EXECUTABLE}"
 	$(V_at)rm -f $(OBJDIR)/erl*.profraw
@@ -732,6 +742,8 @@ $(OBJDIR)/PROFILE: $(BINDIR)/$(PROFILE_EXECUTABLE)
 	  -noshell -s estone_SUITE pgo -s init stop >> $(OBJDIR)/PROFILE_LOG
 	$(V_at)touch $@
 
+.SECONDARY: $(patsubst %.o,%_pu.gcda,$(PROFILE_OBJS))
+
 $(OBJDIR)/%_pu.gcda: $(OBJDIR)/PROFILE
 	$(V_at)mv $(OBJDIR)/$*_pg.gcda $@
 	$(V_at)touch $@
@@ -1167,6 +1179,10 @@ DEP_FLAGS=-MM $(MG_FLAG) $(CFLAGS) $(INCLUDES) -Inifs/common -Idrivers/common -I
 SYS_SRC=$(ALL_SYS_SRC)
 endif
 
+.PHONY: check_emu_registers
+check_emu_registers: $(OBJDIR)/beam_emu$(PROFILE_MARKER).S
+	utils/beam_emu_vars -vars 'c_p E HTOP FCALLS I reg' $^
+
 .PHONY: $(TARGET)/gen_git_version.mk
 $(TARGET)/gen_git_version.mk:
 # We touch beam/erl_bif.info.c if we regenerated the git version to force a
-- 
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