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PR rtl-optimization/70467
authorjakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
Fri, 1 Apr 2016 16:08:21 +0000 (16:08 +0000)
committerjakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
Fri, 1 Apr 2016 16:08:21 +0000 (16:08 +0000)
commit0edb9bfe8b60013cc0d6aa6dfc4039b2213f1f6d
tree5cab43b888420f1abb496d4e7cd4c3bc22851a4dtree | snapshot
parent678c417be9fa29e1c349b02fa5e2d078fd51c53dcommit | diff
PR rtl-optimization/70467
* config/i386/i386.md (*add<dwi>3_doubleword, *sub<dwi>3_doubleword):
If low word of the last operand is 0, just emit addition/subtraction
for the high word.

* gcc.target/i386/pr70467-2.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@234679 138bc75d-0d04-0410-961f-82ee72b054a4
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gcc/config/i386/i386.md diff | blob | blame | history
gcc/testsuite/ChangeLog diff | blob | blame | history
gcc/testsuite/gcc.target/i386/pr70467-2.c [new file with mode: 0644] blob
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