x86: Add tests for -n option of x86 assembler

The -n command-line of x86 assembler disables optimization of alignment
directives, like ".balign 8, 0x90", with multi-byte nop instructions
such as leal 0(%esi),%esi.

	PR gas/22464
	* testsuite/gas/i386/align-1.s: New file.
	* testsuite/gas/i386/align-1a.d: Likewise.
	* testsuite/gas/i386/align-1b.d: Likewise.
	* testsuite/gas/i386/i386.exp: Run align-1a and align-1b.

diff --git a/gas/ChangeLog b/gas/ChangeLog
index b60b7ea200ae97bd1daf43370762050f95bb11ff..fd4f3793f27324eaf16b706afe926d40a7adcd8e 100644 (file)
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,11 @@
+2017-11-21  H.J. Lu  <hongjiu.lu@intel.com>
+
+       PR gas/22464
+       * testsuite/gas/i386/align-1.s: New file.
+       * testsuite/gas/i386/align-1a.d: Likewise.
+       * testsuite/gas/i386/align-1b.d: Likewise.
+       * testsuite/gas/i386/i386.exp: Run align-1a and align-1b.
+
 2017-11-21  Claudiu Zissulescu <claziss@synopsys.com>
 
        * testsuite/gas/arc/b.d : Update test.

diff --git a/gas/testsuite/gas/i386/align-1.s b/gas/testsuite/gas/i386/align-1.s
new file mode 100644 (file)
index 0000000..69638d2
--- /dev/null
+++ b/gas/testsuite/gas/i386/align-1.s
@@ -0,0 +1,7 @@
+       .text
+_start:
+       movl    %edi, %eax
+       .balign 8, 0x90
+       movl    $0, %edx
+       .balign 8, 0x90
+       addl    %eax, %edx

diff --git a/gas/testsuite/gas/i386/align-1a.d b/gas/testsuite/gas/i386/align-1a.d
new file mode 100644 (file)
index 0000000..3fc27cb
--- /dev/null
+++ b/gas/testsuite/gas/i386/align-1a.d
@@ -0,0 +1,17 @@
+#name: i386 balign
+#source: align-1.s
+#as: -mtune=generic32
+#objdump: -dr
+
+.*: +file format .*i386.*
+
+
+Disassembly of section .text:
+
+0+ <_start>:
+[      ]*[a-f0-9]+:    89 f8                   mov    %edi,%eax
+[      ]*[a-f0-9]+:    8d b6 00 00 00 00       lea    0x0\(%esi\),%esi
+[      ]*[a-f0-9]+:    ba 00 00 00 00          mov    \$0x0,%edx
+[      ]*[a-f0-9]+:    8d 76 00                lea    0x0\(%esi\),%esi
+[      ]*[a-f0-9]+:    01 c2                   add    %eax,%edx
+#pass

diff --git a/gas/testsuite/gas/i386/align-1b.d b/gas/testsuite/gas/i386/align-1b.d
new file mode 100644 (file)
index 0000000..f8300ea
--- /dev/null
+++ b/gas/testsuite/gas/i386/align-1b.d
@@ -0,0 +1,24 @@
+#name: i386 balign (-n)
+#source: align-1.s
+#as: -mtune=generic32 -n
+#objdump: -dr
+
+.*: +file format .*i386.*
+
+
+Disassembly of section .text:
+
+0+ <_start>:
+[      ]*[a-f0-9]+:    89 f8                   mov    %edi,%eax
+[      ]*[a-f0-9]+:    90                      nop
+[      ]*[a-f0-9]+:    90                      nop
+[      ]*[a-f0-9]+:    90                      nop
+[      ]*[a-f0-9]+:    90                      nop
+[      ]*[a-f0-9]+:    90                      nop
+[      ]*[a-f0-9]+:    90                      nop
+[      ]*[a-f0-9]+:    ba 00 00 00 00          mov    \$0x0,%edx
+[      ]*[a-f0-9]+:    90                      nop
+[      ]*[a-f0-9]+:    90                      nop
+[      ]*[a-f0-9]+:    90                      nop
+[      ]*[a-f0-9]+:    01 c2                   add    %eax,%edx
+#pass

diff --git a/gas/testsuite/gas/i386/i386.exp b/gas/testsuite/gas/i386/i386.exp
index a053676df89bbf61c497a0bf55a7f2e67f4908d4..7e102b621efb8cf16ff2dfe431631a4bd7b56905 100644 (file)
--- a/gas/testsuite/gas/i386/i386.exp
+++ b/gas/testsuite/gas/i386/i386.exp
@@ -427,6 +427,8 @@ if [expr ([istarget "i*86-*-*"] ||  [istarget "x86_64-*-*"]) && [gas_32_check]]
     run_dump_test "notrack"
     run_dump_test "notrack-intel"
     run_list_test "notrackbad" "-al"
+    run_dump_test "align-1a"
+    run_dump_test "align-1b"
 
     # These tests require support for 8 and 16 bit relocs,
     # so we only run them for ELF and COFF targets.