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f031e8ad01
multiply sequence when the power is a constant integer. Before, our codegen for std::pow(.., int) always turned into a libcall, which was really inefficient. This should also make many gfortran programs happier I'd imagine. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92388 91177308-0d34-0410-b5e6-96231b3b80d8
12 lines
356 B
LLVM
12 lines
356 B
LLVM
; RUN: llc %s -march=x86 -mcpu=yonah -o - | grep mulsd | count 6
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; Ideally this would compile to 5 multiplies.
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define double @_Z3f10d(double %a) nounwind readonly ssp noredzone {
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entry:
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%0 = tail call double @llvm.powi.f64(double %a, i32 15) nounwind ; <double> [#uses=1]
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ret double %0
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}
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declare double @llvm.powi.f64(double, i32) nounwind readonly
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