From: uros <uros@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri, 10 Jul 2015 11:56:48 +0000 (+0000)
Subject: 	PR target/66813
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ce85984c5002a164636515f712e762ce45ee63db;p=thirdparty%2Fgcc.git

	PR target/66813
	* config/i386/i386.c (ix86_md_asm_adjust): Emit movstrictqi
	sequence for TARGET_ZERO_EXTEND_WITH_AND targets.

testsuite/ChangeLog:

	PR target/66813
	* gcc.target/i386/pr66813.c: New test.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@225662 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e3b8d27da864..f305c72481ab 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2015-07-10  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/66813
+	* config/i386/i386.c (ix86_md_asm_adjust): Emit movstrictqi
+	sequence for TARGET_ZERO_EXTEND_WITH_AND targets.
+
 2015-07-10  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/66820
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index a18c733d2112..007e0e13955c 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -45842,7 +45842,17 @@ ix86_md_asm_adjust (vec<rtx> &outputs, vec<rtx> &/*inputs*/,
 	{
 	  rtx destqi = gen_reg_rtx (QImode);
 	  emit_insn (gen_rtx_SET (destqi, x));
-	  x = gen_rtx_ZERO_EXTEND (dest_mode, destqi);
+
+	  if (TARGET_ZERO_EXTEND_WITH_AND
+	      && optimize_function_for_speed_p (cfun))
+	    {
+	      x = force_reg (dest_mode, const0_rtx);
+
+	      emit_insn (gen_movstrictqi
+			 (gen_lowpart (QImode, x), destqi));
+	    }
+	  else
+	    x = gen_rtx_ZERO_EXTEND (dest_mode, destqi);
 	}
       emit_insn (gen_rtx_SET (dest, x));
     }
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 04c64c45ff93..237827575488 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2015-07-10  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/66813
+	* gcc.target/i386/pr66813.c: New test.
+
 2015-07-10  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/66820
diff --git a/gcc/testsuite/gcc.target/i386/pr66813.c b/gcc/testsuite/gcc.target/i386/pr66813.c
new file mode 100644
index 000000000000..d4d8cc69d2db
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr66813.c
@@ -0,0 +1,5 @@
+/* { dg-do compile { target { ia32 } } } */
+/* { dg-options "-march=pentium" } */
+
+void f_s(void) { short x; asm("" : "=@ccc"(x)); }
+void f_i(void) { int x; asm("" : "=@ccc"(x)); }