diff options
| author | toon <toon@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-08-02 11:01:31 +0000 |
|---|---|---|
| committer | toon <toon@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-08-02 11:01:31 +0000 |
| commit | 0b91d495ba909ef43abcb035bdb3776966bd9612 (patch) | |
| tree | 80947de2c0a402b92da9a5341fccbff49d0fd0c4 /gcc/simplify-rtx.c | |
| parent | 00ae6be78c05e5130c3bcf817720f7817e755f68 (diff) | |
| download | gcc-0b91d495ba909ef43abcb035bdb3776966bd9612.tar.gz | |
2002-08-02 Toon Moene <toon@moene.indiv.nluug.nl>
* simplify-rtx.c (simplify_binary_operation): x * 1 is allowed
when not honoring signalling NaNs.
(simplify_ternary_operation): a == b has a definite value
when not honoring NaNs.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@55980 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/simplify-rtx.c')
| -rw-r--r-- | gcc/simplify-rtx.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 135846ca82f..14e8840d447 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -1169,10 +1169,10 @@ simplify_binary_operation (code, mode, op0, op1) && ! side_effects_p (op0)) return op1; - /* In IEEE floating point, x*1 is not equivalent to x for nans. - However, ANSI says we can drop signals, - so we can do this anyway. */ - if (trueop1 == CONST1_RTX (mode)) + /* In IEEE floating point, x*1 is not equivalent to x for + signalling NaNs. */ + if (!HONOR_SNANS (mode) + && trueop1 == CONST1_RTX (mode)) return op0; /* Convert multiply by constant power of two into shift unless @@ -2193,12 +2193,12 @@ simplify_ternary_operation (code, mode, op0_mode, op0, op1, op2) /* Convert a == b ? b : a to "a". */ if (GET_CODE (op0) == NE && ! side_effects_p (op0) - && (! FLOAT_MODE_P (mode) || flag_unsafe_math_optimizations) + && !HONOR_NANS (mode) && rtx_equal_p (XEXP (op0, 0), op1) && rtx_equal_p (XEXP (op0, 1), op2)) return op1; else if (GET_CODE (op0) == EQ && ! side_effects_p (op0) - && (! FLOAT_MODE_P (mode) || flag_unsafe_math_optimizations) + && !HONOR_NANS (mode) && rtx_equal_p (XEXP (op0, 1), op1) && rtx_equal_p (XEXP (op0, 0), op2)) return op2; |