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| author | H.J. Lu <hjl.tools@gmail.com> | 2018-03-08 06:41:34 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2018-03-08 06:41:34 -0800 |
| commit | d3d50934a9101416c3106497d6ea9ce548760253 (patch) | |
| tree | 1f8b1ad5d7b7052323ac1a0d51ef61e189a736f2 /gas/testsuite | |
| parent | 347a87745eab23d8427349787bde4a938a1e8c3e (diff) | |
| download | gdb-d3d50934a9101416c3106497d6ea9ce548760253.zip gdb-d3d50934a9101416c3106497d6ea9ce548760253.tar.gz gdb-d3d50934a9101416c3106497d6ea9ce548760253.tar.bz2 | |
x86-64: Also optimize "clr reg64"
"clr reg" is an alias of "xor reg, reg". We can encode "clr reg64" as
"xor reg32, reg32".
gas/
* config/tc-i386.c (optimize_encoding): Also encode "clr reg64"
as "xor reg32, reg32".
* testsuite/gas/i386/x86-64-optimize-1.s: Add "clr reg64" tests.
* testsuite/gas/i386/x86-64-optimize-1.d: Updated.
opcodes/
* i386-opc.tbl: Add Optimize to clr.
* i386-tbl.h: Regenerated.
Diffstat (limited to 'gas/testsuite')
| -rw-r--r-- | gas/testsuite/gas/i386/x86-64-optimize-1.d | 2 | ||||
| -rw-r--r-- | gas/testsuite/gas/i386/x86-64-optimize-1.s | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/gas/testsuite/gas/i386/x86-64-optimize-1.d b/gas/testsuite/gas/i386/x86-64-optimize-1.d index 506d586..f7fd1be 100644 --- a/gas/testsuite/gas/i386/x86-64-optimize-1.d +++ b/gas/testsuite/gas/i386/x86-64-optimize-1.d @@ -50,4 +50,6 @@ Disassembly of section .text: +[a-f0-9]+: b8 ff 03 00 00 mov \$0x3ff,%eax +[a-f0-9]+: 48 b8 00 00 00 00 01 00 00 00 movabs \$0x100000000,%rax +[a-f0-9]+: 48 b8 00 00 00 00 01 00 00 00 movabs \$0x100000000,%rax + +[a-f0-9]+: 31 c0 xor %eax,%eax + +[a-f0-9]+: 45 31 f6 xor %r14d,%r14d #pass diff --git a/gas/testsuite/gas/i386/x86-64-optimize-1.s b/gas/testsuite/gas/i386/x86-64-optimize-1.s index 2c6dc6d..15d8cb0 100644 --- a/gas/testsuite/gas/i386/x86-64-optimize-1.s +++ b/gas/testsuite/gas/i386/x86-64-optimize-1.s @@ -45,3 +45,5 @@ _start: movq $1023,%rax mov $0x100000000,%rax movq $0x100000000,%rax + clrq %rax + clrq %r14 |