Hi,
The logic to make -mthumb optional for Thumb-only devices is only executed when
no -marm or -mthumb is given on the command-line. This includes configuring GCC
with --with-mode= because this makes the option to be passed before any others.
The optional_mthumb-* testcases are skipped when -marm or -mthumb is passed on
the command line but not when GCC was configured with --with-mode. Not only are
the tests meaningless in these configurations, they also spuriously FAIL if
--with-mode=arm was used since the test are built for Thumb-only devices, as
reported by Christophe Lyon in [1].
[1] https://gcc.gnu.org/ml/gcc-patches/2016-11/msg02082.html
This patch adds logic to target-support.exp to check how was GCC configured and
changes the optional_mthumb testcases to be skipped if there is a default mode
(--with-mode=). It also fixes a couple of typo on the selectors.
ChangeLog entry is as follows:
*** gcc/testsuite/ChangeLog ***
2016-12-09 Thomas Preud'homme <thomas.preudho...@arm.com>
* lib/target-supports.exp (check_configured_with): New procedure.
(check_effective_target_default_mode): new effective target.
* gcc.target/arm/optional_thumb-1.c: Skip if GCC was configured with a
default mode. Fix dg-skip-if target selector syntax.
* gcc.target/arm/optional_thumb-2.c: Likewise.
* gcc.target/arm/optional_thumb-3.c: Fix dg-skip-if target selector
syntax.
Is this ok for stage3?
Best regards,
Thomas
diff --git a/gcc/testsuite/gcc.target/arm/optional_thumb-1.c b/gcc/testsuite/gcc.target/arm/optional_thumb-1.c
index 23df62887ba4aaa1d8717a34ecda9a40246f0552..99cb0c3f33b601fff4493feef72765f7590e18f6 100644
--- a/gcc/testsuite/gcc.target/arm/optional_thumb-1.c
+++ b/gcc/testsuite/gcc.target/arm/optional_thumb-1.c
@@ -1,5 +1,5 @@
-/* { dg-do compile } */
-/* { dg-skip-if "-marm/-mthumb/-march/-mcpu given" { *-*-*} { "-marm" "-mthumb" "-march=*" "-mcpu=*" } } */
+/* { dg-do compile { target { ! default_mode } } } */
+/* { dg-skip-if "-marm/-mthumb/-march/-mcpu given" { *-*-* } { "-marm" "-mthumb" "-march=*" "-mcpu=*" } } */
/* { dg-options "-march=armv6-m" } */
/* Check that -mthumb is not needed when compiling for a Thumb-only target. */
diff --git a/gcc/testsuite/gcc.target/arm/optional_thumb-2.c b/gcc/testsuite/gcc.target/arm/optional_thumb-2.c
index 4bd53a45eca97e62dd3b86d5a1a66c5ca21e7aad..280dfb3fec55570b6cfe934303c9bd3d50322b86 100644
--- a/gcc/testsuite/gcc.target/arm/optional_thumb-2.c
+++ b/gcc/testsuite/gcc.target/arm/optional_thumb-2.c
@@ -1,5 +1,5 @@
-/* { dg-do compile } */
-/* { dg-skip-if "-marm/-mthumb/-march/-mcpu given" { *-*-*} { "-marm" "-mthumb" "-march=*" "-mcpu=*" } } */
+/* { dg-do compile { target { ! default_mode } } } */
+/* { dg-skip-if "-marm/-mthumb/-march/-mcpu given" { *-*-* } { "-marm" "-mthumb" "-march=*" "-mcpu=*" } } */
/* { dg-options "-mcpu=cortex-m4" } */
/* Check that -mthumb is not needed when compiling for a Thumb-only target. */
diff --git a/gcc/testsuite/gcc.target/arm/optional_thumb-3.c b/gcc/testsuite/gcc.target/arm/optional_thumb-3.c
index f1fd5c8840b191e600c20a7817c611bb9bb645df..d9150e09e475dfbeb7b0b0c153c913b1ad6f0777 100644
--- a/gcc/testsuite/gcc.target/arm/optional_thumb-3.c
+++ b/gcc/testsuite/gcc.target/arm/optional_thumb-3.c
@@ -1,8 +1,8 @@
/* { dg-do compile } */
/* { dg-require-effective-target arm_cortex_m } */
-/* { dg-skip-if "-mthumb given" { *-*-*} { "-mthumb" } } */
+/* { dg-skip-if "-mthumb given" { *-*-* } { "-mthumb" } } */
/* { dg-options "-marm" } */
-/* { dg-error "target CPU does not support ARM mode" "missing error with -marm on Thumb-only targets" { target *-*-*} 0 } */
+/* { dg-error "target CPU does not support ARM mode" "missing error with -marm on Thumb-only targets" { target *-*-* } 0 } */
/* Check that -marm gives an error when compiling for a Thumb-only target. */
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 0fc0bafa67d8d34ec74ce2d1d7a2323a375615cc..f7511ef3aebca72c798496fb95ce43fcbbc08ed1 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -252,6 +252,20 @@ proc check_runtime {prop args} {
}]
}
+# Return 1 if GCC was configured with $pattern.
+proc check_configured_with { pattern } {
+ global tool
+
+ set gcc_output [${tool}_target_compile "-v" "" "none" ""]
+ if { [ regexp "Configured with: \[^\n\]*$pattern" $gcc_output ] } {
+ verbose "Matched: $pattern" 2
+ return 1
+ }
+
+ verbose "Failed to match: $pattern" 2
+ return 0
+}
+
###############################
# proc check_weak_available { }
###############################
@@ -3797,6 +3811,12 @@ proc add_options_for_arm_arch_v7ve { flags } {
return "$flags -march=armv7ve"
}
+# Return 1 if GCC was configured with --with-mode=
+proc check_effective_target_default_mode { } {
+
+ return [check_configured_with "with-mode="]
+}
+
# Return 1 if this is an ARM target where -marm causes ARM to be
# used (not Thumb)
