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| author | Jim Wilson <wilson@cygnus.com> | 2000-09-18 21:37:37 +0000 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 2000-09-18 14:37:37 -0700 |
| commit | 226ed43f1efcc6a69e7d1762260918f699485f37 (patch) | |
| tree | 5e6df2b61d7151afdaea936370baf4ec0b1d6d21 /gcc | |
| parent | b542c0fb1184f77f2da855959ae59a850d467a45 (diff) | |
| download | gcc-226ed43f1efcc6a69e7d1762260918f699485f37.zip gcc-226ed43f1efcc6a69e7d1762260918f699485f37.tar.gz gcc-226ed43f1efcc6a69e7d1762260918f699485f37.tar.bz2 | |
Fix ia64-linux kernel fn_hash() miscompilation.
* function.c (fixup_var_refs_1, case ZERO_EXTRACT): If we have a
paradoxical subreg, then directly substitute the replacement and
return.
From-SVN: r36515
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/function.c | 8 |
2 files changed, 14 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index bd55ea6..da57400 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2000-09-18 Jim Wilson <wilson@cygnus.com> + + * function.c (fixup_var_refs_1, case ZERO_EXTRACT): If we have a + paradoxical subreg, then directly substitute the replacement and + return. + Mon 18-Sep-2000 22:12:44 BST Neil Booth <NeilB@earthling.net> * cpp.texi: Update documentation, including some clarifications, diff --git a/gcc/function.c b/gcc/function.c index 969887f..f057114 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -2015,6 +2015,14 @@ fixup_var_refs_1 (var, promoted_mode, loc, insn, replacements) if (replacement->new == 0) replacement->new = gen_reg_rtx (GET_MODE (var)); SUBREG_REG (tem) = replacement->new; + + /* The following code works only if we have a MEM, so we + need to handle the subreg here. We directly substitute + it assuming that a subreg must be OK here. We already + scheduled a replacement to copy the mem into the + subreg. */ + XEXP (x, 0) = tem; + return; } else tem = fixup_memory_subreg (tem, insn, 0); |