mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-21 03:29:40 +00:00
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
|
|
; Ideally this would compile to 5 multiplies.
|
|
|
|
define double @_Z3f10d(double %a) nounwind readonly ssp noredzone {
|
|
entry:
|
|
%0 = tail call double @llvm.powi.f64(double %a, i32 15) nounwind ; <double> [#uses=1]
|
|
ret double %0
|
|
}
|
|
|
|
declare double @llvm.powi.f64(double, i32) nounwind readonly
|
|
|