fsub-fneg.ll
698 Bytes
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -verify-machineinstrs -mtriple=powerpc64le < %s | FileCheck %s
; When fpext is free, we should look through it for optimizations
; even if it has multiple uses and produce an 'fadd' here.
; Y - (fpext(-X)) --> Y + fpext(X)
define double @neg_ext_op1_extra_use(float %x, double %y) nounwind {
; CHECK-LABEL: neg_ext_op1_extra_use:
; CHECK: # %bb.0:
; CHECK-NEXT: xsadddp 0, 2, 1
; CHECK-NEXT: fneg 1, 1
; CHECK-NEXT: xsdivdp 1, 1, 0
; CHECK-NEXT: blr
%t1 = fsub float -0.0, %x
%t2 = fpext float %t1 to double
%t3 = fsub double %y, %t2
%t4 = fdiv double %t2, %t3
ret double %t4
}