From: Uros Bizjak <ubizjak@gmail.com>
Date: Thu, 3 Dec 2020 16:49:42 +0000 (+0100)
Subject: i386: Fix up ix86_md_asm_adjust for TImode [PR98086]
X-Git-Tag: upstream/12.2.0~11241
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=756f55e62f73eb32787497eb9e564d4b21a6e637;p=platform%2Fupstream%2Fgcc.git

i386: Fix up ix86_md_asm_adjust for TImode [PR98086]

ix86_md_asm_adjust assumes that dest_mode can be only [QHSD]Imode
and nothing else.  The patch rewrites zero-extension part to use
convert_to_mode to handle TImode and hypothetically even wider modes.

2020-12-03  Uroš Bizjak  <ubizjak@gmail.com>
	    Jakub Jelinek  <jakub@redhat.com>

gcc/
	PR target/98086
	* config/i386/i386.c (ix86_md_asm_adjustmd): Rewrite
	zero-extension part to use convert_to_mode.

gcc/testsuite/
	PR target/98086
	* gcc.target/i386/pr98086.c: New test.
---

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index c5db8c9..6321678 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -21508,40 +21508,18 @@ ix86_md_asm_adjust (vec<rtx> &outputs, vec<rtx> &/*inputs*/,
 	  continue;
 	}
 
-      if (dest_mode == DImode && !TARGET_64BIT)
-	dest_mode = SImode;
-
-      if (dest_mode != QImode)
-	{
-	  rtx destqi = gen_reg_rtx (QImode);
-	  emit_insn (gen_rtx_SET (destqi, x));
-
-	  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);
-	      if (dest_mode == GET_MODE (dest)
-		  && !register_operand (dest, GET_MODE (dest)))
-		x = force_reg (dest_mode, x);
-	    }
-	}
-
-      if (dest_mode != GET_MODE (dest))
+      if (dest_mode == QImode)
+	emit_insn (gen_rtx_SET (dest, x));
+      else
 	{
-	  rtx tmp = gen_reg_rtx (SImode);
+	  rtx reg = gen_reg_rtx (QImode);
+	  emit_insn (gen_rtx_SET (reg, x));
 
-	  emit_insn (gen_rtx_SET (tmp, x));
-	  emit_insn (gen_zero_extendsidi2 (dest, tmp));
+	  reg = convert_to_mode (dest_mode, reg, 1);
+	  emit_move_insn (dest, reg);
 	}
-      else
-	emit_insn (gen_rtx_SET (dest, x));
     }
+
   rtx_insn *seq = get_insns ();
   end_sequence ();
 
diff --git a/gcc/testsuite/gcc.target/i386/pr98086.c b/gcc/testsuite/gcc.target/i386/pr98086.c
new file mode 100644
index 0000000..254a3b9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr98086.c
@@ -0,0 +1,17 @@
+/* PR target/98086 */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+#ifdef __x86_64__
+typedef __int128 T;
+#else
+typedef long long T;
+#endif
+
+T x;
+
+void
+foo (void)
+{
+  __asm ("" : "=@ccc" (x));
+}