From: aoliva <aoliva@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Sat, 11 Nov 2000 05:54:02 +0000 (+0000)
Subject: * config/sh/sh.h (MODES_TIEABLE_P): Don't tie SFmode to other FP
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=6109c3ffc8305519fde7b4e45b6d8f4d03bb87ec;p=thirdparty%2Fgcc.git

* config/sh/sh.h (MODES_TIEABLE_P): Don't tie SFmode to other FP
modes.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@37380 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b94b70eb8f0d..0b2e121efded 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2000-11-11  Alexandre Oliva  <aoliva@redhat.com>
+
+	* config/sh/sh.h (MODES_TIEABLE_P): Don't tie SFmode to other FP
+	modes.
+
 2000-11-10  Joseph S. Myers  <jsm28@cam.ac.uk>
 
 	* gcc.texi, gcov.texi: Update dates and version numbers.
diff --git a/gcc/config/sh/sh.h b/gcc/config/sh/sh.h
index 330fe2db0b0a..0e7105295c29 100644
--- a/gcc/config/sh/sh.h
+++ b/gcc/config/sh/sh.h
@@ -537,10 +537,15 @@ do {									\
 /* Value is 1 if it is a good idea to tie two pseudo registers
    when one has mode MODE1 and one has mode MODE2.
    If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
-   for any hard reg, then this must be 0 for correct output.  */
+   for any hard reg, then this must be 0 for correct output.
+   That's the case for xd registers: we don't hold SFmode values in
+   them, so we can't tie an SFmode pseudos with one in another
+   floating-point mode.  */
 
 #define MODES_TIEABLE_P(MODE1, MODE2) \
-  ((MODE1) == (MODE2) || GET_MODE_CLASS (MODE1) == GET_MODE_CLASS (MODE2))
+  ((MODE1) == (MODE2) \
+   || (GET_MODE_CLASS (MODE1) == GET_MODE_CLASS (MODE2) \
+       && (MODE1) != SFmode && (MODE2) != SFmode))
 
 /* Specify the registers used for certain standard purposes.
    The values of these macros are register numbers.  */