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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25896 91177308-0d34-0410-b5e6-96231b3b80d8
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Evan Cheng 2006-02-02 02:40:17 +00:00
parent 1e8791d790
commit 8b6e4e6e3e
1 changed files with 5 additions and 12 deletions
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17
lib/Target/X86/README.txt
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@ -215,18 +215,6 @@ when it can invert the result of the compare for free.
//===---------------------------------------------------------------------===//
None of the SSE instructions are handled in X86RegisterInfo::foldMemoryOperand,
which prevents the spiller from folding spill code into the instructions.
This leads to code like this:
mov %eax, 8(%esp)
cvtsi2sd %eax, %xmm0
instead of:
cvtsi2sd 8(%esp), %xmm0
//===---------------------------------------------------------------------===//
LSR should be turned on for the X86 backend and tuned to take advantage of its
addressing modes.
@ -367,3 +355,8 @@ We currently emit:
This is a bugpoint reduced testcase, which is why the testcase doesn't make
much sense (e.g. its an infinite loop). :)
//===---------------------------------------------------------------------===//
None of the FPStack instructions are handled in
X86RegisterInfo::foldMemoryOperand, which prevents the spiller from
folding spill code into the instructions.