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[binutils-gdb] gas: avoid spurious failures in non-ELF targets in the SPARC testsuite.


https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=c88960d081f0b37ec03c66a13115e2a68e40d1ad

commit c88960d081f0b37ec03c66a13115e2a68e40d1ad
Author: Jose E. Marchesi <jose.marchesi@oracle.com>
Date:   Wed Jul 27 06:59:16 2016 -0700

    gas: avoid spurious failures in non-ELF targets in the SPARC testsuite.
    
    Many of the existing sparc tests fail in non-ELF targets (coff and
    a.out) due to spurious differences in the expected results:
    
    - Unlike ELF, a.out text sections are aligned to 2**3 and padded
      accordingly.  The padding instruction is a `nop' (01 00 00 00).
    
    - Likewise, coff text sections are also aligned to 2**3 and padded
      accordingly.  However, the padding instruction in these targets is an
      `illtrap 0' (00 00 00 00).
    
    - Unlike ELF, a.out and coff binaries don't contain hardware
      capabilities bits that could be used by BFD to determine the opcodes
      architecture corresponding to the instructions encoded in the
      objects (v9, v9a, v9b, v9c, etc).  Consequently, in both a.out and
      coff tests we would need to pass proper `-m sparc:vXXX' options when
      invoking objdump before comparing results.
    
    In order to fix these issues, the most obvious solution would be to have
    three variants of .d files per impacted test.  For example, for save.d
    we would have: save-elf.d, save-aout.d and save-coff.d.  Using the
    `#source' directive, a single save.s file would provide the input for
    all of them.  However, this approach has the following problems:
    
    - The #target and #notarget .d directives are very limited: they use
      globs instead of regular expressions, and thus it is not possible (or
      too messy) to use them to discriminate between elf, coff and a.out
      sparc targets.
    
    - It adds little or no value to have variants of all these tests for all
      the target types, and it would be a burden to maintain them.  Actually
      the features tested in the spuriously failing tests (relatively modern
      sparc instructions, registers and asis) are not really found in
      running coff or a.out sparc systems.
    
    This patch changes sparc.exp so it will run these tests only in
    ELF-targets, using the more standard `is_elf_format' from
    binutils-common.exp instead of the ad-hoc (and less convenient, as it
    must be called before _every_ single elf-only test) sparc_elf_setup.
    
    Incidentally, the patch also fixes the #name entry for save-args.d.
    
    Tested in sparc*-*-linux-gnu, sparc-aout and sparc-coff targets.
    
    gas/ChangeLog:
    
    2016-07-27  Jose E. Marchesi  <jose.marchesi@oracle.com>
    
    	* testsuite/gas/sparc/sparc.exp: Use is_elf_format to discriminate
    	ELF targets.
    	Run natural, natural-32, pr4587, ticc-imm-reg, v8-movwr-imm,
    	pause, save-args, cbcond, cfr, crypto edge, flush, hpcvis3, ima,
    	ld_st_fsr, ldtw_sttw, ldd_std, ldx_stx, ldx_efsr, mwait, mcdper,
    	sparc5vis4, xcrypto, v9branch1 and imm-plus-rreg only in ELF
    	targets.
    	(sparc_elf_setup): Delete.
    	* testsuite/gas/sparc/save-args.d: Fix a copy-paste typo in the
    	test's #name entry.

Diff:
---
 gas/ChangeLog                       | 13 ++++++
 gas/testsuite/gas/sparc/save-args.d |  2 +-
 gas/testsuite/gas/sparc/sparc.exp   | 89 +++++++++++++++++--------------------
 3 files changed, 56 insertions(+), 48 deletions(-)

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 0273942..9ffb962 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,16 @@
+2016-07-27  Jose E. Marchesi  <jose.marchesi@oracle.com>
+
+	* testsuite/gas/sparc/sparc.exp: Use is_elf_format to discriminate
+	ELF targets.
+	Run natural, natural-32, pr4587, ticc-imm-reg, v8-movwr-imm,
+	pause, save-args, cbcond, cfr, crypto edge, flush, hpcvis3, ima,
+	ld_st_fsr, ldtw_sttw, ldd_std, ldx_stx, ldx_efsr, mwait, mcdper,
+	sparc5vis4, xcrypto, v9branch1 and imm-plus-rreg only in ELF
+	targets.
+	(sparc_elf_setup): Delete.
+	* testsuite/gas/sparc/save-args.d: Fix a copy-paste typo in the
+	test's #name entry.
+
 2016-07-27  Maciej W. Rozycki  <macro@imgtec.com>
 
 	* config/tc-mips.c (RELAX_MICROMIPS_ENCODE): Add `nods' flag.
diff --git a/gas/testsuite/gas/sparc/save-args.d b/gas/testsuite/gas/sparc/save-args.d
index 19e6d72..af21100 100644
--- a/gas/testsuite/gas/sparc/save-args.d
+++ b/gas/testsuite/gas/sparc/save-args.d
@@ -1,6 +1,6 @@
 #as: -Av8
 #objdump: -dr
-#name: software traps
+#name: save args
 
 .*: +file format .*
 
diff --git a/gas/testsuite/gas/sparc/sparc.exp b/gas/testsuite/gas/sparc/sparc.exp
index f0a129d..8cb0904 100644
--- a/gas/testsuite/gas/sparc/sparc.exp
+++ b/gas/testsuite/gas/sparc/sparc.exp
@@ -31,25 +31,47 @@ proc gas_64_check { } {
     return [regexp "elf64\[_-\]sparc" [lindex $status 1]]
 }
 
-proc sparc_elf_setup { } {
-    setup_xfail "sparc*-*-*aout*" "sparc*-*-sunos4*"
-    setup_xfail "sparc*-fujitsu-none" "sparc*-*-*n*bsd*"
-    setup_xfail "sparc*-*-coff" "sparc*-*-lynxos*"
-    clear_xfail "sparc64*-*-*n*bsd*"
-    clear_xfail "sparc*-*-netbsdelf*"
-}
-
 if [istarget sparc*-*-*] {
-    run_dump_test "synth"
-    # The next four tests are ELF only.
-    sparc_elf_setup
-    run_dump_test "unalign"
-    sparc_elf_setup
-    run_dump_test "pcrel"
-    sparc_elf_setup
-    run_dump_test "plt"
-    sparc_elf_setup
-    run_dump_test "gotop32"
+
+    if [is_elf_format] {
+        # The next five tests are ELF only.
+        run_dump_test "unalign"
+        run_dump_test "pcrel"
+        run_dump_test "plt"
+        run_dump_test "gotop32"
+        run_dump_test "pc2210"
+        # The features tested in the tests below are not ELF-specific.
+        # However, these features are not present in practice in COFF
+        # and a.out targets.  Running them only in ELF targets allows
+        # us to don't have to replicate pattern test files as that
+        # would bring no practical advantage.
+        run_dump_test "natural"
+        run_dump_test "natural-32"
+        run_list_test "pr4587" ""
+        run_dump_test "ticc-imm-reg"
+        run_dump_test "v8-movwr-imm"
+        run_dump_test "pause"
+        run_dump_test "save-args"
+        run_dump_test "cbcond"
+        run_dump_test "cfr"
+        run_dump_test "crypto"
+        run_dump_test "edge"
+        run_dump_test "flush"
+        run_dump_test "hpcvis3"
+        run_dump_test "ima"
+        run_dump_test "ld_st_fsr"
+        run_dump_test "ldtw_sttw"
+        run_dump_test "ldd_std"
+        run_dump_test "ldx_stx"
+        run_dump_test "ldx_efsr"
+        run_dump_test "mwait"
+        run_dump_test "mcdper"
+        run_dump_test "sparc5vis4"
+        run_dump_test "xcrypto"
+        run_dump_test "v9branch1"
+        run_dump_test "imm-plus-rreg"
+    }
+
     if [gas_64_check] {
 	run_dump_test "asi"
 	run_dump_test "membar"
@@ -68,39 +90,12 @@ if [istarget sparc*-*-*] {
 	run_dump_test "plt64"
 	run_dump_test "gotop64"
     }
-    run_dump_test "imm-plus-rreg"
-    run_dump_test "ticc-imm-reg"
-    run_dump_test "v8-movwr-imm"
-    run_dump_test "save-args"
-    run_dump_test "v9branch1"
+
+    run_dump_test "synth"
     run_dump_test "v9branch2"
     run_dump_test "v9branch3"
     run_dump_test "v9branch4"
     run_dump_test "v9branch5"
-    run_dump_test "pc2210"
-    run_dump_test "hpcvis3"
-    run_dump_test "ima"
-    run_dump_test "crypto"
-    run_dump_test "xcrypto"
-    run_dump_test "cbcond"
-    run_dump_test "pause"
-    run_dump_test "cfr"
-    run_dump_test "ldtw_sttw"
-    run_dump_test "ldtxa"
-    run_dump_test "ldd_std"
-    run_dump_test "ldx_stx"
-    run_dump_test "ldx_efsr"
-    run_dump_test "ld_st_fsr"
-    run_dump_test "edge"
-    run_dump_test "flush"
-    run_dump_test "mwait"
-    run_dump_test "mcdper"
-    run_dump_test "sparc5vis4"
-    run_dump_test "natural"
-    run_dump_test "natural-32"
-
-    run_list_test "pr4587" ""
-
     run_dump_test "pr19910-1"
     run_list_test "pr19910-2"
 }


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