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| author | Richard Henderson <rth@redhat.com> | 2000-10-25 16:02:14 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2000-10-25 16:02:14 -0700 |
| commit | d4f1c1faff4405a94368214cb84694f9bb250c0c (patch) | |
| tree | 335353cf74e34d010706540a1812ca0d9f0792ec /gcc | |
| parent | 47a53f53a8cabd457da63046f6232d392666d00d (diff) | |
| download | gcc-d4f1c1faff4405a94368214cb84694f9bb250c0c.zip gcc-d4f1c1faff4405a94368214cb84694f9bb250c0c.tar.gz gcc-d4f1c1faff4405a94368214cb84694f9bb250c0c.tar.bz2 | |
simplify-rtx.c (simplify_relational_operation): Sign extend low words before sign extending to high words.
* simplify-rtx.c (simplify_relational_operation): Sign extend
low words before sign extending to high words.
From-SVN: r37061
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/simplify-rtx.c | 5 |
2 files changed, 7 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 1ddc191..67eebfe 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2000-10-25 Richard Henderson <rth@redhat.com> + + * simplify-rtx.c (simplify_relational_operation): Sign extend + low words before sign extending to high words. + 2000-10-25 Nick Clifton <nickc@redhat.com> * config/mcore/mcore.c: Include config.h before system.h. diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 85ce605..648dcb4 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -1812,9 +1812,6 @@ simplify_relational_operation (code, mode, op0, op1) /* If WIDTH is nonzero and smaller than HOST_BITS_PER_WIDE_INT, we have to sign or zero-extend the values. */ - if (width != 0 && width <= HOST_BITS_PER_WIDE_INT) - h0u = h1u = 0, h0s = HWI_SIGN_EXTEND (l0s), h1s = HWI_SIGN_EXTEND (l1s); - if (width != 0 && width < HOST_BITS_PER_WIDE_INT) { l0u &= ((HOST_WIDE_INT) 1 << width) - 1; @@ -1826,6 +1823,8 @@ simplify_relational_operation (code, mode, op0, op1) if (l1s & ((HOST_WIDE_INT) 1 << (width - 1))) l1s |= ((HOST_WIDE_INT) (-1) << width); } + if (width != 0 && width <= HOST_BITS_PER_WIDE_INT) + h0u = h1u = 0, h0s = HWI_SIGN_EXTEND (l0s), h1s = HWI_SIGN_EXTEND (l1s); equal = (h0u == h1u && l0u == l1u); op0lt = (h0s < h1s || (h0s == h1s && l0u < l1u)); |