Revert patch that disabled exporting of global ranges.

Andrew's last set of changes fixes the bootstrap problem on i686 when
global ranges are exported from evrp.  The specific patch that fixes the
problem is 715914d3:

	Author: Andrew MacLeod <amacleod@redhat.com>
	Date:   Mon May 31 12:13:50 2021 -0400

	    Do not calculate new values when evaluating a debug statement.

	    Add a flag to enable/disable immediately improving poor values found during
	    cache propagation. Then disable it when processing debug statements.

This patch reverts commit 2364b58 now that exporting of global ranges works.

Tested on x86-64 Linux with default flags, and on i686 with the flags in
the PR: --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-languages=c,c++ --enable-cet i686-linux --enable-bootstrap --with-fpmath=sse --disable-libcc1 --disable-libcilkrts --disable-libsanitizer

gcc/ChangeLog:

	* gimple-ssa-evrp.c: Enable exporting of global ranges.

gcc/testsuite/ChangeLog:

	* gcc.dg/Wstringop-overflow-55.c: Adjust for global ranges changes.
	* gcc.dg/pr80776-1.c: Same.

3 files changed, 7 insertions, 11 deletions

diff --git a/gcc/gimple-ssa-evrp.c b/gcc/gimple-ssa-evrp.c
index f1eea20..118d103 100644
--- a/gcc/gimple-ssa-evrp.c
+++ b/gcc/gimple-ssa-evrp.c
@@ -127,8 +127,7 @@ public:
     if (dump_file && (dump_flags & TDF_DETAILS))
       m_ranger->dump (dump_file);
 
-    // FIXME: Do not export ranges until PR100787 is fixed.
-    //m_ranger->export_global_ranges ();
+    m_ranger->export_global_ranges ();
     disable_ranger (cfun);
   }
 
@@ -194,8 +193,7 @@ public:
     if (dump_file && (dump_flags & TDF_DETAILS))
       m_ranger->dump (dump_file);
 
-    // FIXME: Do not export ranges until PR100787 is fixed.
-    //m_ranger->export_global_ranges ();
+    m_ranger->export_global_ranges ();
     disable_ranger (cfun);
   }
 
diff --git a/gcc/testsuite/gcc.dg/Wstringop-overflow-55.c b/gcc/testsuite/gcc.dg/Wstringop-overflow-55.c
index 5f83af7..c3c2dbe 100644
--- a/gcc/testsuite/gcc.dg/Wstringop-overflow-55.c
+++ b/gcc/testsuite/gcc.dg/Wstringop-overflow-55.c
@@ -66,7 +66,7 @@ void warn_ptrdiff_anti_range_add (ptrdiff_t i)
 {
   i |= 1;
 
-  char ca5[5];              // { dg-message "at offset \\\[1, 5]" "pr?????" { xfail *-*-* } }
+  char ca5[5];              // { dg-message "at offset \\\[1, 5]" "pr?????" }
   char *p0 = ca5;           // offset
   char *p1 = p0 + i;        //  1-5
   char *p2 = p1 + i;        //  2-5
@@ -74,7 +74,7 @@ void warn_ptrdiff_anti_range_add (ptrdiff_t i)
   char *p4 = p3 + i;        //  4-5
   char *p5 = p4 + i;        //   5
 
-  memset (p5, 0, 5);        // { dg-warning "writing 5 bytes into a region of size 0" "pr?????" { xfail *-*-* } }
+  memset (p5, 0, 5);        // { dg-warning "writing 5 bytes into a region of size" "pr?????" }
 
   sink (p0, p1, p2, p3, p4, p5);
 }
@@ -83,7 +83,7 @@ void warn_int_anti_range (int i)
 {
   i |= 1;
 
-  char ca5[5];              // { dg-message "at offset \\\[1, 5]" "pr?????" { xfail *-*-* } }
+  char ca5[5];              // { dg-message "at offset \\\[1, 5]" "pr?????" }
   char *p0 = ca5;           // offset
   char *p1 = p0 + i;        //  1-5
   char *p2 = p1 + i;        //  2-5
@@ -91,7 +91,7 @@ void warn_int_anti_range (int i)
   char *p4 = p3 + i;        //  4-5
   char *p5 = p4 + i;        //   5
 
-  memset (p5, 0, 5);        // { dg-warning "writing 5 bytes into a region of size 0" "pr?????" { xfail *-*-* } }
+  memset (p5, 0, 5);        // { dg-warning "writing 5 bytes into a region of size" "pr?????" }
 
   sink (p0, p1, p2, p3, p4, p5);
 }
diff --git a/gcc/testsuite/gcc.dg/pr80776-1.c b/gcc/testsuite/gcc.dg/pr80776-1.c
index af41c0c..f3a120b 100644
--- a/gcc/testsuite/gcc.dg/pr80776-1.c
+++ b/gcc/testsuite/gcc.dg/pr80776-1.c
@@ -17,7 +17,5 @@ Foo (void)
     __builtin_unreachable ();
   if (! (0 <= i && i <= 999999))
     __builtin_unreachable ();
-  /* The correctness bits for [E]VRP cannot handle chained conditionals
-     when deciding to ignore a unreachable branch for setting SSA range info. */
-  sprintf (number, "%d", i); /* { dg-bogus "writing" "" { xfail *-*-* } } */
+  sprintf (number, "%d", i); /* { dg-bogus "writing" "" } */
 }