emit-rtl-c (gen_lowpart_common): Accept non-paradoxical SUBREG when UNITS_PER_WORD is small.

* emit-rtl-c (gen_lowpart_common): Accept non-paradoxical SUBREG when UNITS_PER_WORD is small. From-SVN: r36625

emit-rtl-c (gen_lowpart_common): Accept non-paradoxical SUBREG when UNITS_PER_WORD is small.
* emit-rtl-c (gen_lowpart_common): Accept non-paradoxical SUBREG when UNITS_PER_WORD is small. From-SVN: r36625
90e9ee6c · Alan Lehotsky · Richard Henderson · be544957 · 90e9ee6c · 90e9ee6c
Commit 90e9ee6c authored Sep 25, 2000 by Alan Lehotsky Committed by Richard Henderson Sep 25, 2000
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gcc/ChangeLog
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gcc/emit-rtl.c
+2 -1

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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
+2000-09-24  Alan Lehotsky  <alehotsky@cygnus.com>
+
+	* emit-rtl-c (gen_lowpart_common): Accept non-paradoxical SUBREG when
+	UNITS_PER_WORD is small.
+
 2000-09-25  Joseph S. Myers  <jsm28@cam.ac.uk>

 	* c-common.c (format_char_info): Add flags2; update comments.

--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -707,7 +707,8 @@ gen_lowpart_common (mode, x)
 	return gen_rtx_fmt_e (GET_CODE (x), mode, XEXP (x, 0));
    }
  else if (GET_CODE (x) == SUBREG
-	   && (GET_MODE_SIZE (mode) <= UNITS_PER_WORD
+	   && (GET_MODE_SIZE (mode) <= GET_MODE_SIZE (GET_MODE (SUBREG_REG (x)))
+	       || GET_MODE_SIZE (mode) <= UNITS_PER_WORD
 	       || GET_MODE_SIZE (mode) == GET_MODE_UNIT_SIZE (GET_MODE (x))))
    return (GET_MODE (SUBREG_REG (x)) == mode && SUBREG_WORD (x) == 0
 	    ? SUBREG_REG (x)