diff options
| author | pinskia <pinskia@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-11-02 23:32:32 +0000 |
|---|---|---|
| committer | pinskia <pinskia@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-11-02 23:32:32 +0000 |
| commit | ca6e8538b157fc3a5b7629d19f4b0ed15e1ee9c0 (patch) | |
| tree | b2da9394c1af97b14041472f1c6a7ffc41a66ccd /gcc | |
| parent | 086f95898fe86dccdfa10c90a81b19bf80fec771 (diff) | |
| download | ppe42-gcc-ca6e8538b157fc3a5b7629d19f4b0ed15e1ee9c0.tar.gz ppe42-gcc-ca6e8538b157fc3a5b7629d19f4b0ed15e1ee9c0.zip | |
2012-11-02 Andrew Pinski <apinski@cavium.com>
PR rtl-opt/54524
* simplify-rtx.c (simplify_relational_operation_1): Don't simplify
(LTU/GEU (PLUS a 0) 0) into (GEU/LTU a 0) since they are not equivalent.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@193111 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/simplify-rtx.c | 4 |
2 files changed, 9 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 284dd8a1520..ada7ff5e786 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2012-11-02 Andrew Pinski <apinski@cavium.com> + + PR rtl-opt/54524 + * simplify-rtx.c (simplify_relational_operation_1): Don't simplify + (LTU/GEU (PLUS a 0) 0) into (GEU/LTU a 0) since they are not equivalent. + 2012-11-02 Jan Hubicka <jh@suse.cz> * tree-ssa-loop-niter.c (double_int_cmp, bound_index, diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index cb63b80500e..6c50d301fe0 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -4546,7 +4546,9 @@ simplify_relational_operation_1 (enum rtx_code code, enum machine_mode mode, && GET_CODE (op0) == PLUS && CONST_INT_P (XEXP (op0, 1)) && (rtx_equal_p (op1, XEXP (op0, 0)) - || rtx_equal_p (op1, XEXP (op0, 1)))) + || rtx_equal_p (op1, XEXP (op0, 1))) + /* (LTU/GEU (PLUS a 0) 0) is not the same as (GEU/LTU a 0). */ + && XEXP (op0, 1) != const0_rtx) { rtx new_cmp = simplify_gen_unary (NEG, cmp_mode, XEXP (op0, 1), cmp_mode); |
