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| author | Jim Wilson <wilson@cygnus.com> | 1997-09-02 19:37:05 +0000 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 1997-09-02 12:37:05 -0700 |
| commit | a6a503ed40ada59da0a8bcfe64adcffb407d8d8e (patch) | |
| tree | 8ccb01cfb1412c49bbf01846c4ecc1fa3dff9956 /gcc | |
| parent | a94729bc72dad85c039ebd062dfdd72722994033 (diff) | |
| download | gcc-a6a503ed40ada59da0a8bcfe64adcffb407d8d8e.zip gcc-a6a503ed40ada59da0a8bcfe64adcffb407d8d8e.tar.gz gcc-a6a503ed40ada59da0a8bcfe64adcffb407d8d8e.tar.bz2 | |
Fix alpha-linux core dump reported by H.J. Lu.
* alpha/alpha.h (PREFERRED_RELOAD_CLASS): Return NO_REGS if NO_REGS
is passed in.
* emit-rtl.c (gen_lowpart_common): Add code to convert CONST_INT to
SFmode for 64 bit hosts.
From-SVN: r15035
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/config/alpha/alpha.h | 2 | ||||
| -rw-r--r-- | gcc/emit-rtl.c | 20 |
3 files changed, 28 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 94e3097..1f7438d 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +Tue Sep 2 12:00:36 1997 Jim Wilson <wilson@cygnus.com> + + * alpha/alpha.h (PREFERRED_RELOAD_CLASS): Return NO_REGS if NO_REGS + is passed in. + * emit-rtl.c (gen_lowpart_common): Add code to convert CONST_INT to + SFmode for 64 bit hosts. + Tue Sep 2 13:42:38 1997 Paul N. Hilfinger <hilfingr@CS.Berkeley.EDU> * fixincludes: Permits spaces between # and define. Discard C++ diff --git a/gcc/config/alpha/alpha.h b/gcc/config/alpha/alpha.h index 16d7398..232920c 100644 --- a/gcc/config/alpha/alpha.h +++ b/gcc/config/alpha/alpha.h @@ -691,7 +691,7 @@ enum reg_class { NO_REGS, GENERAL_REGS, FLOAT_REGS, ALL_REGS, #define PREFERRED_RELOAD_CLASS(X, CLASS) \ (CONSTANT_P (X) && (X) != const0_rtx && (X) != CONST0_RTX (GET_MODE (X)) \ - ? ((CLASS) == FLOAT_REGS ? NO_REGS : GENERAL_REGS) \ + ? ((CLASS) == FLOAT_REGS || (CLASS) == NO_REGS ? NO_REGS : GENERAL_REGS)\ : (CLASS)) /* Loading and storing HImode or QImode values to and from memory diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index 650c01c..86948de 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -809,6 +809,26 @@ gen_lowpart_common (mode, x) return CONST_DOUBLE_FROM_REAL_VALUE (u.d, mode); } #endif + + /* We need an extra case for machines where HOST_BITS_PER_WIDE_INT is the + same as sizeof (double), such as the alpha. We only handle the + REAL_ARITHMETIC case, which is easy. Testing HOST_BITS_PER_WIDE_INT + is not strictly necessary, but is done to restrict this code to cases + where it is known to work. */ +#ifdef REAL_ARITHMETIC + else if (mode == SFmode + && GET_CODE (x) == CONST_INT + && GET_MODE_BITSIZE (mode) * 2 == HOST_BITS_PER_WIDE_INT) + { + REAL_VALUE_TYPE r; + HOST_WIDE_INT i; + + i = INTVAL (x); + r = REAL_VALUE_FROM_TARGET_SINGLE (i); + return CONST_DOUBLE_FROM_REAL_VALUE (r, mode); + } +#endif + /* Similarly, if this is converting a floating-point value into a single-word integer. Only do this is the host and target parameters are compatible. */ |