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Particularly ugly code.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28397 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-05-19 19:41:33 +00:00
parent 82743daacf
commit de050a7509
1 changed files with 14 additions and 0 deletions
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14
lib/Target/X86/README.txt
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@ -36,6 +36,20 @@ http://gcc.gnu.org/ml/gcc-patches/2004-04/msg00659.html
//===---------------------------------------------------------------------===//
On darwin/x86, we should codegen:
ret double 0.000000e+00
as fld0/ret, not as:
movl $0, 4(%esp)
movl $0, (%esp)
fldl (%esp)
...
ret
//===---------------------------------------------------------------------===//
This should use fiadd on chips where it is profitable:
double foo(double P, int *I) { return P+*I; }