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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26430 91177308-0d34-0410-b5e6-96231b3b80d8
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Evan Cheng 2006-02-28 23:38:49 +00:00
parent 8c03fe4aca
commit aafc1412b1
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16
lib/Target/X86/README.txt
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@ -517,3 +517,19 @@ It would be better to emit "cmp %al, 1" than a xor and test.
//===---------------------------------------------------------------------===//
Enable X86InstrInfo::convertToThreeAddress().
//===---------------------------------------------------------------------===//
Investigate whether it is better to codegen the following
%tmp.1 = mul int %x, 9
to
movl 4(%esp), %eax
leal (%eax,%eax,8), %eax
as opposed to what llc is currently generating:
imull $9, 4(%esp), %eax
Currently the load folding imull has a higher complexity than the LEA32 pattern.