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Use movl instead of movabs for x32. 

2011-07-10  H.J. Lu  <hongjiu.lu@intel.com>

	* config/i386/i386.c (ix86_trampoline_init): Use movl instead
	of movabs for x32.

From-SVN: r176129
This commit is contained in:
H.J. Lu 2011-07-10 21:42:08 +00:00 committed by H.J. Lu
parent 3db72de312
commit 9e419e387c
2 changed files with 19 additions and 4 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2011-07-10 H.J. Lu <hongjiu.lu@intel.com>
* config/i386/i386.c (ix86_trampoline_init): Use movl instead
of movabs for x32.
2011-07-10 Richard Henderson <rth@redhat.com>
* config/i386/i386.c (x86_output_mi_thunk): Generate rtl and

18
gcc/config/i386/i386.c
View File

@ -22730,7 +22730,7 @@ ix86_trampoline_init (rtx m_tramp, tree fndecl, rtx chain_value)
}
else
{
int offset = 0;
int offset = 0, size;
/* Load the function address to r11. Try to load address using
the shorter movl instead of movabs. We may want to support
@ -22759,11 +22759,21 @@ ix86_trampoline_init (rtx m_tramp, tree fndecl, rtx chain_value)
/* Load static chain using movabs to r10. */
mem = adjust_address (m_tramp, HImode, offset);
emit_move_insn (mem, gen_int_mode (0xba49, HImode));
/* Use the shorter movl instead of movabs for x32. */
if (TARGET_X32)
{
size = 6;
emit_move_insn (mem, gen_int_mode (0xba41, HImode));
}
else
{
size = 10;
emit_move_insn (mem, gen_int_mode (0xba49, HImode));
}
mem = adjust_address (m_tramp, DImode, offset + 2);
mem = adjust_address (m_tramp, ptr_mode, offset + 2);
emit_move_insn (mem, chain_value);
offset += 10;
offset += size;
/* Jump to r11; the last (unused) byte is a nop, only there to
pad the write out to a single 32-bit store. */