abe-bisect.sh abe-bisect-helper.sh: New scripts.

This pair of scripts helps bisecting a regression
in GCC (master branch) using ABE.

Change-Id: Iea54df1d5038eb3f570a9f387990118cd3ac7d92

1 files changed, 66 insertions, 0 deletions

diff --git a/abe-bisect.sh b/abe-bisect.sh
new file mode 100755
index 00000000..7a08a49c
--- /dev/null
+++ b/abe-bisect.sh
@@ -0,0 +1,66 @@
+#!/bin/bash
+
+# This script is a helper to bisect GCC regressions.
+# Inputs (as env. variables):
+# EXP: name of .exp file to run
+# TESTNAME: name of test to run
+# GOOD
+# BAD
+# TARGET
+# CPU
+# FPU
+# MODE
+# SIMU
+# TARGETBOARD: additional test flags
+
+# Sample usage:
+# EXP=advsimd-intrinsics.exp TESTNAME=vduph_lane.c TARGET=aarch64-linux-gnu GOOD=242941 BAD=242954 ./abe-bisect.sh
+
+# Check if the variable NAME is set
+check_set()
+{
+    name=$1
+    eval val=\$${name}
+    [ x$val = x ] && echo $1 not set && exit 1
+}
+
+check_set EXP
+check_set TESTNAME
+check_set GOOD
+check_set BAD
+check_set TARGET
+#check_set CPU
+#check_set FPU
+#check_set MODE
+#check_set SIMU
+#check_set TARGETBOARD
+
+rundir=`pwd -P`
+mydir="$(dirname $0)"
+cd "${mydir}"
+mydir="$(pwd)"
+cd ${rundir}
+
+git clone http://git.linaro.org/toolchain/abe.git
+ABE=${rundir}/abe
+${ABE}/configure --with-git-reference-dir /home/tcwg-buildslave/snapshots-ref
+
+# Checkout GCC master
+${ABE}/abe.sh --target $TARGET gcc=gcc.git~master --checkout all
+
+cd snapshots/gcc.git~master
+
+git bisect reset
+git reset --hard
+git bisect start --no-checkout
+
+GOODSHA1=`git log --format=format:"%H" --grep=trunk@${GOOD} master`
+BADSHA1=`git log --format=format:"%H" --grep=trunk@${BAD} master`
+
+echo GOOD: $GOODSHA1
+echo BAD: $BADSHA1
+
+git bisect good ${GOODSHA1}
+git bisect bad ${BADSHA1}
+
+RUNDIR=${rundir} ABE=${ABE} EXP=${EXP} TESTNAME=${TESTNAME} TARGET=${TARGET} CPU=${CPU} FPU=${FPU} MODE=${MODE} SIMU=${SIMU} TARGETBOARD=${TARGETBOARD} git bisect run ${mydir}/abe-bisect-helper.sh