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| author | Roger Sayle <roger@eyesopen.com> | 2005-02-07 05:39:05 +0000 |
|---|---|---|
| committer | Roger Sayle <sayle@gcc.gnu.org> | 2005-02-07 05:39:05 +0000 |
| commit | b1a224073ea134943717c8dcdbbfb5ce004a418a (patch) | |
| tree | c31c203ba0f2e2ce0750bf38cb96677a0d2330d0 /gcc/simplify-rtx.c | |
| parent | 149056b0940ecede19695c936984a3bb8a6f1764 (diff) | |
| download | gcc-b1a224073ea134943717c8dcdbbfb5ce004a418a.zip gcc-b1a224073ea134943717c8dcdbbfb5ce004a418a.tar.gz gcc-b1a224073ea134943717c8dcdbbfb5ce004a418a.tar.bz2 | |
re PR rtl-optimization/19800 (mmix-knuth-mmixware broken, building newlib/libm/common/s_fmax.c)
PR rtl-optimization/19800
* simplify_rtx.c (simplify_relational_operaration_1): Explicitly
call gen_lowpart_common and gen_lowpart_SUBREG instead of calling
gen_lowpart.
From-SVN: r94691
Diffstat (limited to 'gcc/simplify-rtx.c')
| -rw-r--r-- | gcc/simplify-rtx.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index f23dba7..a92fc3c 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -2888,9 +2888,17 @@ simplify_relational_operation_1 (enum rtx_code code, enum machine_mode mode, && cmp_mode != VOIDmode && nonzero_bits (op0, cmp_mode) == 1 && STORE_FLAG_VALUE == 1) - return GET_MODE_SIZE (mode) > GET_MODE_SIZE (cmp_mode) - ? simplify_gen_unary (ZERO_EXTEND, mode, op0, cmp_mode) - : gen_lowpart (mode, op0); + { + rtx tmp; + if (GET_MODE_SIZE (mode) > GET_MODE_SIZE (cmp_mode)) + return simplify_gen_unary (ZERO_EXTEND, mode, op0, cmp_mode); + tmp = gen_lowpart_common (mode, op0); + if (tmp) + return tmp; + if (GET_MODE (op0) != mode) + return gen_lowpart_SUBREG (mode, op0); + return op0; + } return NULL_RTX; } |