File: fp-move-12.ll

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llvm-toolchain-17 1%3A17.0.6-22
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; Test moves between FPRs on z13.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s

; Test that we use LDR instead of LER.
define float @f1(float %a, float %b) {
; CHECK-LABEL: f1:
; CHECK: ldr %f0, %f2
; CHECK: br %r14
  ret float %b
}

; Test f64 moves.
define double @f2(double %a, double %b) {
; CHECK-LABEL: f2:
; CHECK: ldr %f0, %f2
; CHECK: br %r14
  ret double %b
}

; Test f128 moves.  Since f128s are passed by reference, we need to force
; a copy by other means.
define void @f3(ptr %x) {
; CHECK-LABEL: f3:
; CHECK: lxr
; CHECK: axbr
; CHECK: br %r14
  %val = load volatile fp128, ptr %x
  %sum = fadd fp128 %val, %val
  store volatile fp128 %sum, ptr %x
  store volatile fp128 %val, ptr %x
  ret void
}