From a84b56771371cf1cd03812baff69164e7192115a Mon Sep 17 00:00:00 2001
From: Tobias Grosser <grosser@fim.uni-passau.de>
Date: Wed, 10 Nov 2010 16:31:34 +0000
Subject: [PATCH] Detect if llvm-gcc is built on dragonegg.

Store the flags needed to disable optimizations and to emit LLVM-IR depending on
the version of llvm-gcc used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118684 91177308-0d34-0410-b5e6-96231b3b80d8
---
 Makefile.config.in    |  5 +++
 autoconf/configure.ac | 30 +++++++++++++-
 configure             | 93 ++++++++++++++++++++++++++++++++++++++++---
 3 files changed, 121 insertions(+), 7 deletions(-)

diff --git a/Makefile.config.in b/Makefile.config.in
index 662e57f5148..9c2f4e6f202 100644
--- a/Makefile.config.in
+++ b/Makefile.config.in
@@ -195,6 +195,8 @@ LLVMGXX  := @LLVMGXX@
 LLVMCC1  := @LLVMCC1@
 LLVMCC1PLUS := @LLVMCC1PLUS@
 LLVMGCC_LANGS := @LLVMGCC_LANGS@
+LLVMGCC_DRAGONEGG := @LLVMGCC_DRAGONEGG@
+LLVMGCC_DISABLEOPT_FLAGS := @LLVMGCC_DISABLEOPT_FLAGS@
 
 # Information on Clang, if configured.
 CLANGPATH := @CLANGPATH@
@@ -204,6 +206,9 @@ ENABLE_BUILT_CLANG := @ENABLE_BUILT_CLANG@
 # The LLVM capable compiler to use.
 LLVMCC_OPTION := @LLVMCC_OPTION@
 
+# The flag used to emit LLVM IR.
+LLVMCC_EMITIR_FLAG = @LLVMCC_EMITIR_FLAG@
+
 # Path to directory where object files should be stored during a build.
 # Set OBJ_ROOT to "." if you do not want to use a separate place for
 # object files.
diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 5fa85d0ab5d..1d5fa154fc4 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -1414,12 +1414,37 @@ fi
 dnl Check, whether __dso_handle is present
 AC_CHECK_FUNCS([__dso_handle])
 
+dnl Check wether llvm-gcc is based on dragonegg
+AC_CACHE_CHECK([whether llvm-gcc is dragonegg],[llvm_cv_llvmgcc_dragonegg],
+[llvm_cv_llvmgcc_dragonegg="no"
+if test -x "$LLVMGCC" ; then
+  cp /dev/null conftest.c
+  "$LLVMGCC" -fplugin-arg-dragonegg-emit-ir -S -o - conftest.c | \
+  grep 'target datalayout =' > /dev/null 2>&1
+  if test $? -eq 0 ; then
+    llvm_cv_llvmgcc_dragonegg="yes"
+  fi
+  rm conftest.c
+fi])
+
+dnl Set the flags needed to emit LLVM IR and to disable optimizations
+dnl in llvmgcc
+if test "$llvm_cv_llvmgcc_dragonegg" = "yes" ; then
+  LLVMCC_EMITIR_FLAG="-fplugin-arg-dragonegg-emit-ir"
+  LLVMGCC_DISABLEOPT_FLAGS="-fplugin-arg-dragonegg-disable-llvm-optzns"
+else
+  LLVMCC_EMITIR_FLAG="-emit-llvm"
+  LLVMGCC_DISABLEOPT_FLAGS="-mllvm -disable-llvm-optzns"
+fi
+
+AC_SUBST(LLVMCC_EMITIR_FLAG)
+
 dnl See if the llvm-gcc executable can compile to LLVM assembly
 AC_CACHE_CHECK([whether llvm-gcc is sane],[llvm_cv_llvmgcc_sanity],
 [llvm_cv_llvmgcc_sanity="no"
 if test -x "$LLVMGCC" ; then
   cp /dev/null conftest.c
-  "$LLVMGCC" -emit-llvm -S -o - conftest.c | \
+  "$LLVMGCC" "$LLVMCC_EMITIR_FLAG" -S -o - conftest.c | \
       grep 'target datalayout =' > /dev/null 2>&1
   if test $? -eq 0 ; then
     llvm_cv_llvmgcc_sanity="yes"
@@ -1428,6 +1453,7 @@ if test -x "$LLVMGCC" ; then
 fi])
 
 dnl Since we have a sane llvm-gcc, identify it and its sub-tools
+dnl Furthermore, add some information about the tools
 if test "$llvm_cv_llvmgcc_sanity" = "yes" ; then
   AC_MSG_CHECKING([llvm-gcc component support])
   llvmcc1path=`"$LLVMGCC" --print-prog-name=cc1`
@@ -1438,6 +1464,8 @@ if test "$llvm_cv_llvmgcc_sanity" = "yes" ; then
   AC_SUBST(LLVMGCCDIR,$llvmgccdir)
   llvmgcclangs=[`"$LLVMGCC" -v --help 2>&1 | grep '^Configured with:' | sed 's/^.*--enable-languages=\([^ ]*\).*/\1/'`]
   AC_SUBST(LLVMGCC_LANGS,$llvmgcclangs)
+  AC_SUBST(LLVMGCC_DRAGONEGG,$llvm_cv_llvmgcc_dragonegg)
+  AC_SUBST(LLVMGCC_DISABLEOPT_FLAGS)
   AC_MSG_RESULT([ok])
 fi
 
diff --git a/configure b/configure
index e9945224b5c..9c807946d87 100755
--- a/configure
+++ b/configure
@@ -771,10 +771,13 @@ USE_OPROFILE
 HAVE_PTHREAD
 HUGE_VAL_SANITY
 MMAP_FILE
+LLVMCC_EMITIR_FLAG
 LLVMCC1
 LLVMCC1PLUS
 LLVMGCCDIR
 LLVMGCC_LANGS
+LLVMGCC_DRAGONEGG
+LLVMGCC_DISABLEOPT_FLAGS
 SHLIBEXT
 SHLIBPATH_VAR
 LLVM_PREFIX
@@ -11498,7 +11501,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 11501 "configure"
+#line 11504 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -20560,6 +20563,35 @@ fi
 done
 
 
+{ echo "$as_me:$LINENO: checking whether llvm-gcc is dragonegg" >&5
+echo $ECHO_N "checking whether llvm-gcc is dragonegg... $ECHO_C" >&6; }
+if test "${llvm_cv_llvmgcc_dragonegg+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  llvm_cv_llvmgcc_dragonegg="no"
+if test -x "$LLVMGCC" ; then
+  cp /dev/null conftest.c
+  "$LLVMGCC" -fplugin-arg-dragonegg-emit-ir -S -o - conftest.c | \
+  grep 'target datalayout =' > /dev/null 2>&1
+  if test $? -eq 0 ; then
+    llvm_cv_llvmgcc_dragonegg="yes"
+  fi
+  rm conftest.c
+fi
+fi
+{ echo "$as_me:$LINENO: result: $llvm_cv_llvmgcc_dragonegg" >&5
+echo "${ECHO_T}$llvm_cv_llvmgcc_dragonegg" >&6; }
+
+if test "$llvm_cv_llvmgcc_dragonegg" = "yes" ; then
+  LLVMCC_EMITIR_FLAG="-fplugin-arg-dragonegg-emit-ir"
+  LLVMGCC_DISABLEOPT_FLAGS="-fplugin-arg-dragonegg-disable-llvm-optzns"
+else
+  LLVMCC_EMITIR_FLAG="-emit-llvm"
+  LLVMGCC_DISABLEOPT_FLAGS="-mllvm -disable-llvm-optzns"
+fi
+
+
+
 { echo "$as_me:$LINENO: checking whether llvm-gcc is sane" >&5
 echo $ECHO_N "checking whether llvm-gcc is sane... $ECHO_C" >&6; }
 if test "${llvm_cv_llvmgcc_sanity+set}" = set; then
@@ -20568,7 +20600,7 @@ else
   llvm_cv_llvmgcc_sanity="no"
 if test -x "$LLVMGCC" ; then
   cp /dev/null conftest.c
-  "$LLVMGCC" -emit-llvm -S -o - conftest.c | \
+  "$LLVMGCC" "$LLVMCC_EMITIR_FLAG" -S -o - conftest.c | \
       grep 'target datalayout =' > /dev/null 2>&1
   if test $? -eq 0 ; then
     llvm_cv_llvmgcc_sanity="yes"
@@ -20594,6 +20626,9 @@ echo $ECHO_N "checking llvm-gcc component support... $ECHO_C" >&6; }
   llvmgcclangs=`"$LLVMGCC" -v --help 2>&1 | grep '^Configured with:' | sed 's/^.*--enable-languages=\([^ ]*\).*/\1/'`
   LLVMGCC_LANGS=$llvmgcclangs
 
+  LLVMGCC_DRAGONEGG=$llvm_cv_llvmgcc_dragonegg
+
+
   { echo "$as_me:$LINENO: result: ok" >&5
 echo "${ECHO_T}ok" >&6; }
 fi
@@ -21786,10 +21821,13 @@ USE_OPROFILE!$USE_OPROFILE$ac_delim
 HAVE_PTHREAD!$HAVE_PTHREAD$ac_delim
 HUGE_VAL_SANITY!$HUGE_VAL_SANITY$ac_delim
 MMAP_FILE!$MMAP_FILE$ac_delim
+LLVMCC_EMITIR_FLAG!$LLVMCC_EMITIR_FLAG$ac_delim
 LLVMCC1!$LLVMCC1$ac_delim
 LLVMCC1PLUS!$LLVMCC1PLUS$ac_delim
 LLVMGCCDIR!$LLVMGCCDIR$ac_delim
 LLVMGCC_LANGS!$LLVMGCC_LANGS$ac_delim
+LLVMGCC_DRAGONEGG!$LLVMGCC_DRAGONEGG$ac_delim
+LLVMGCC_DISABLEOPT_FLAGS!$LLVMGCC_DISABLEOPT_FLAGS$ac_delim
 SHLIBEXT!$SHLIBEXT$ac_delim
 SHLIBPATH_VAR!$SHLIBPATH_VAR$ac_delim
 LLVM_PREFIX!$LLVM_PREFIX$ac_delim
@@ -21808,11 +21846,9 @@ OCAML_LIBDIR!$OCAML_LIBDIR$ac_delim
 ENABLE_VISIBILITY_INLINES_HIDDEN!$ENABLE_VISIBILITY_INLINES_HIDDEN$ac_delim
 RPATH!$RPATH$ac_delim
 RDYNAMIC!$RDYNAMIC$ac_delim
-LIBOBJS!$LIBOBJS$ac_delim
-LTLIBOBJS!$LTLIBOBJS$ac_delim
 _ACEOF
 
-  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 96; then
+  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 97; then
     break
   elif $ac_last_try; then
     { { echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5
@@ -21848,6 +21884,51 @@ CEOF$ac_eof
 _ACEOF
 
 
+ac_delim='%!_!# '
+for ac_last_try in false false false false false :; do
+  cat >conf$$subs.sed <<_ACEOF
+LIBOBJS!$LIBOBJS$ac_delim
+LTLIBOBJS!$LTLIBOBJS$ac_delim
+_ACEOF
+
+  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 2; then
+    break
+  elif $ac_last_try; then
+    { { echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5
+echo "$as_me: error: could not make $CONFIG_STATUS" >&2;}
+   { (exit 1); exit 1; }; }
+  else
+    ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
+  fi
+done
+
+ac_eof=`sed -n '/^CEOF[0-9]*$/s/CEOF/0/p' conf$$subs.sed`
+if test -n "$ac_eof"; then
+  ac_eof=`echo "$ac_eof" | sort -nru | sed 1q`
+  ac_eof=`expr $ac_eof + 1`
+fi
+
+cat >>$CONFIG_STATUS <<_ACEOF
+cat >"\$tmp/subs-3.sed" <<\CEOF$ac_eof
+/@[a-zA-Z_][a-zA-Z_0-9]*@/!b end
+_ACEOF
+sed '
+s/[,\\&]/\\&/g; s/@/@|#_!!_#|/g
+s/^/s,@/; s/!/@,|#_!!_#|/
+:n
+t n
+s/'"$ac_delim"'$/,g/; t
+s/$/\\/; p
+N; s/^.*\n//; s/[,\\&]/\\&/g; s/@/@|#_!!_#|/g; b n
+' >>$CONFIG_STATUS <conf$$subs.sed
+rm -f conf$$subs.sed
+cat >>$CONFIG_STATUS <<_ACEOF
+:end
+s/|#_!!_#|//g
+CEOF$ac_eof
+_ACEOF
+
+
 # VPATH may cause trouble with some makes, so we remove $(srcdir),
 # ${srcdir} and @srcdir@ from VPATH if srcdir is ".", strip leading and
 # trailing colons and then remove the whole line if VPATH becomes empty
@@ -22091,7 +22172,7 @@ s&@abs_builddir@&$ac_abs_builddir&;t t
 s&@abs_top_builddir@&$ac_abs_top_builddir&;t t
 s&@INSTALL@&$ac_INSTALL&;t t
 $ac_datarootdir_hack
-" $ac_file_inputs | sed -f "$tmp/subs-1.sed" | sed -f "$tmp/subs-2.sed" | sed 's/|#_!!_#|//g' >$tmp/out
+" $ac_file_inputs | sed -f "$tmp/subs-1.sed" | sed -f "$tmp/subs-2.sed" | sed -f "$tmp/subs-3.sed" >$tmp/out
 
 test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
   { ac_out=`sed -n '/\${datarootdir}/p' "$tmp/out"`; test -n "$ac_out"; } &&
-- 
2.34.1