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[NFC][Test] Add a test to verify the DAGCombine of fma

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QingShan Zhang 2020-01-07 03:13:39 +00:00
parent e8d9d202bc
commit d877229b5b
1 changed files with 143 additions and 0 deletions
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llvm/test/CodeGen/PowerPC/fma-combine.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=powerpc64le-unknown-linux-gnu -enable-unsafe-fp-math < %s | FileCheck -check-prefix=CHECK-FAST %s
; RUN: llc -mtriple=powerpc64le-unknown-linux-gnu -enable-unsafe-fp-math -mattr=-vsx < %s | FileCheck -check-prefix=CHECK-FAST-NOVSX %s
; RUN: llc -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s
define double @fma_combine1(double %a, double %b, double %c) {
; CHECK-FAST-LABEL: fma_combine1:
; CHECK-FAST: # %bb.0: # %entry
; CHECK-FAST-NEXT: xsnegdp 0, 3
; CHECK-FAST-NEXT: xsmsubadp 1, 0, 2
; CHECK-FAST-NEXT: blr
;
; CHECK-FAST-NOVSX-LABEL: fma_combine1:
; CHECK-FAST-NOVSX: # %bb.0: # %entry
; CHECK-FAST-NOVSX-NEXT: fneg 0, 3
; CHECK-FAST-NOVSX-NEXT: fmsub 1, 0, 2, 1
; CHECK-FAST-NOVSX-NEXT: blr
;
; CHECK-LABEL: fma_combine1:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xsnegdp 0, 3
; CHECK-NEXT: xsmuldp 0, 0, 2
; CHECK-NEXT: xssubdp 1, 0, 1
; CHECK-NEXT: blr
entry:
%fneg1 = fneg double %c
%mul = fmul double %fneg1, %b
%add = fsub double %mul, %a
ret double %add
}
define double @fma_combine2(double %a, double %b, double %c) {
; CHECK-FAST-LABEL: fma_combine2:
; CHECK-FAST: # %bb.0: # %entry
; CHECK-FAST-NEXT: xsnegdp 0, 3
; CHECK-FAST-NEXT: xsmsubadp 1, 2, 0
; CHECK-FAST-NEXT: blr
;
; CHECK-FAST-NOVSX-LABEL: fma_combine2:
; CHECK-FAST-NOVSX: # %bb.0: # %entry
; CHECK-FAST-NOVSX-NEXT: fneg 0, 3
; CHECK-FAST-NOVSX-NEXT: fmsub 1, 2, 0, 1
; CHECK-FAST-NOVSX-NEXT: blr
;
; CHECK-LABEL: fma_combine2:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xsnegdp 0, 3
; CHECK-NEXT: xsmuldp 0, 2, 0
; CHECK-NEXT: xssubdp 1, 0, 1
; CHECK-NEXT: blr
entry:
%fneg1 = fneg double %c
%mul = fmul double %b, %fneg1
%add = fsub double %mul, %a
ret double %add
}
@v = common local_unnamed_addr global double 0.000000e+00, align 8
@z = common local_unnamed_addr global double 0.000000e+00, align 8
define double @fma_combine_two_uses(double %a, double %b, double %c) {
; CHECK-FAST-LABEL: fma_combine_two_uses:
; CHECK-FAST: # %bb.0: # %entry
; CHECK-FAST-NEXT: xsnegdp 0, 3
; CHECK-FAST-NEXT: addis 3, 2, v@toc@ha
; CHECK-FAST-NEXT: addis 4, 2, z@toc@ha
; CHECK-FAST-NEXT: xsnegdp 3, 1
; CHECK-FAST-NEXT: xsmsubadp 1, 0, 2
; CHECK-FAST-NEXT: stfd 0, z@toc@l(4)
; CHECK-FAST-NEXT: stfd 3, v@toc@l(3)
; CHECK-FAST-NEXT: blr
;
; CHECK-FAST-NOVSX-LABEL: fma_combine_two_uses:
; CHECK-FAST-NOVSX: # %bb.0: # %entry
; CHECK-FAST-NOVSX-NEXT: fneg 3, 3
; CHECK-FAST-NOVSX-NEXT: addis 3, 2, v@toc@ha
; CHECK-FAST-NOVSX-NEXT: addis 4, 2, z@toc@ha
; CHECK-FAST-NOVSX-NEXT: fmsub 0, 3, 2, 1
; CHECK-FAST-NOVSX-NEXT: fneg 2, 1
; CHECK-FAST-NOVSX-NEXT: stfd 3, z@toc@l(4)
; CHECK-FAST-NOVSX-NEXT: fmr 1, 0
; CHECK-FAST-NOVSX-NEXT: stfd 2, v@toc@l(3)
; CHECK-FAST-NOVSX-NEXT: blr
;
; CHECK-LABEL: fma_combine_two_uses:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xsnegdp 3, 3
; CHECK-NEXT: addis 3, 2, v@toc@ha
; CHECK-NEXT: addis 4, 2, z@toc@ha
; CHECK-NEXT: xsmuldp 0, 3, 2
; CHECK-NEXT: stfd 3, z@toc@l(4)
; CHECK-NEXT: xsnegdp 2, 1
; CHECK-NEXT: xssubdp 0, 0, 1
; CHECK-NEXT: stfd 2, v@toc@l(3)
; CHECK-NEXT: fmr 1, 0
; CHECK-NEXT: blr
entry:
%fneg = fneg double %a
store double %fneg, double* @v, align 8
%fneg1 = fneg double %c
store double %fneg1, double* @z, align 8
%mul = fmul double %fneg1, %b
%add = fsub double %mul, %a
ret double %add
}
define double @fma_combine_one_use(double %a, double %b, double %c) {
; CHECK-FAST-LABEL: fma_combine_one_use:
; CHECK-FAST: # %bb.0: # %entry
; CHECK-FAST-NEXT: xsnegdp 0, 3
; CHECK-FAST-NEXT: addis 3, 2, v@toc@ha
; CHECK-FAST-NEXT: xsnegdp 3, 1
; CHECK-FAST-NEXT: xsmsubadp 1, 0, 2
; CHECK-FAST-NEXT: stfd 3, v@toc@l(3)
; CHECK-FAST-NEXT: blr
;
; CHECK-FAST-NOVSX-LABEL: fma_combine_one_use:
; CHECK-FAST-NOVSX: # %bb.0: # %entry
; CHECK-FAST-NOVSX-NEXT: fneg 0, 3
; CHECK-FAST-NOVSX-NEXT: addis 3, 2, v@toc@ha
; CHECK-FAST-NOVSX-NEXT: fmsub 0, 0, 2, 1
; CHECK-FAST-NOVSX-NEXT: fneg 2, 1
; CHECK-FAST-NOVSX-NEXT: fmr 1, 0
; CHECK-FAST-NOVSX-NEXT: stfd 2, v@toc@l(3)
; CHECK-FAST-NOVSX-NEXT: blr
;
; CHECK-LABEL: fma_combine_one_use:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xsnegdp 0, 3
; CHECK-NEXT: addis 3, 2, v@toc@ha
; CHECK-NEXT: xsmuldp 0, 0, 2
; CHECK-NEXT: xsnegdp 2, 1
; CHECK-NEXT: xssubdp 0, 0, 1
; CHECK-NEXT: stfd 2, v@toc@l(3)
; CHECK-NEXT: fmr 1, 0
; CHECK-NEXT: blr
entry:
%fneg = fneg double %a
store double %fneg, double* @v, align 8
%fneg1 = fneg double %c
%mul = fmul double %fneg1, %b
%add = fsub double %mul, %a
ret double %add
}