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X86: Add a note.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175408 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2013-02-17 23:34:14 +00:00
parent 8dc741e400
commit 774ec7ba05
1 changed files with 9 additions and 0 deletions
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9
lib/Target/X86/README-SSE.txt
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@ -953,3 +953,12 @@ similarly, v[0]-v[1] should match to hsubpd, and {v[0]-v[1], w[0]-w[1]} should
turn into hsubpd also.
//===---------------------------------------------------------------------===//
define <2 x i32> @foo(<2 x double> %in) {
%x = fptosi <2 x double> %in to <2 x i32>
ret <2 x i32> %x
}
Should compile into cvttpd2dq instead of being scalarized into 2 cvttsd2si.
//===---------------------------------------------------------------------===//