Merging r198290:

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r198290 | aschwaighofer | 2014-01-01 22:31:36 -0500 (Wed, 01 Jan 2014) | 23 lines

BasicAA: Fix value equality and phi cycles

When there are cycles in the value graph we have to be careful interpreting
"Value*" identity as "value" equivalence. We interpret the value of a phi node
as the value of its operands.
When we check for value equivalence now we make sure that the "Value*" dominates
all cycles (phis).

%0 = phi [%noaliasval, %addr2]
%l = load %ptr
%addr1 = gep @a, 0, %l
%addr2 = gep @a, 0, (%l + 1)
store %ptr ...

Before this patch we would return NoAlias for (%0, %addr1) which is wrong
because the value of the load is from different iterations of the loop.

Tested on x86_64 -mavx at O3 and O3 -flto with no performance or compile time
regressions.

PR18068
radar://15653794

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_34@206051 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 33 insertions, 2 deletions

diff --git a/utils/release/test-release.sh b/utils/release/test-release.sh
index 91dac4ca78..90c5f1ab2d 100755
--- a/utils/release/test-release.sh
+++ b/utils/release/test-release.sh
@@ -26,6 +26,7 @@ Base_url="http://llvm.org/svn/llvm-project"
 Release=""
 Release_no_dot=""
 RC=""
+DOT=""
 Triple=""
 use_gzip="no"
 do_checkout="yes"
@@ -45,6 +46,7 @@ function usage() {
     echo ""
     echo " -release X.Y      The release number to test."
     echo " -rc NUM           The pre-release candidate number."
+    echo " -dot NUM          The dot release to test e.g. X.Y.DOT_NUM [default: 0]"
     echo " -final            The final release candidate."
     echo " -triple TRIPLE    The target triple for this machine."
     echo " -j NUM            Number of compile jobs to run. [default: 3]"
@@ -76,6 +78,13 @@ while [ $# -gt 0 ]; do
         -final | --final )
             RC=final
             ;;
+        -dot | --dot )
+            shift
+            DOT="$1"
+            if [ $DOT -eq 0 ]; then
+                DOT=""
+            fi
+            ;;
         -triple | --triple )
             shift
             Triple="$1"
@@ -137,6 +146,10 @@ while [ $# -gt 0 ]; do
     shift
 done
 
+if [ -n "$DOT" ]; then
+    Release="$Release.$DOT"
+fi
+
 # Check required arguments.
 if [ -z "$Release" ]; then
     echo "error: no release number specified"
@@ -217,12 +230,29 @@ if [ `uname -s` != "Darwin" ]; then
   check_program_exists 'objdump'
 fi
 
+function get_svn_tag() {
+    case $1 in
+        # llvm and clang are the only projects currently doing dot releases.
+        llvm | cfe)
+            if [ -z $DOT ]; then
+                SvnTag="$RC"
+            else
+                SvnTag="dot$DOT-$RC"
+            fi
+            ;;
+        *)
+            SvnTag="$RC"
+            ;;
+    esac
+}
+
 # Make sure that the URLs are valid.
 function check_valid_urls() {
     for proj in $projects ; do
         echo "# Validating $proj SVN URL"
 
-        if ! svn ls $Base_url/$proj/tags/RELEASE_$Release_no_dot/$RC > /dev/null 2>&1 ; then
+        get_svn_tag "$proj"
+        if ! svn ls $Base_url/$proj/tags/RELEASE_$Release_no_dot/$SvnTag > /dev/null 2>&1 ; then
             echo "llvm $Release release candidate $RC doesn't exist!"
             exit 1
         fi
@@ -235,7 +265,8 @@ function export_sources() {
 
     for proj in $projects ; do
         echo "# Exporting $proj $Release-RC$RC sources"
-        if ! svn export -q $Base_url/$proj/tags/RELEASE_$Release_no_dot/$RC $proj.src ; then
+        get_svn_tag "$proj"
+        if ! svn export -q $Base_url/$proj/tags/RELEASE_$Release_no_dot/$SvnTag $proj.src ; then
             echo "error: failed to export $proj project"
             exit 1
         fi