| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=aarch64-none-linux-gnu -verify-machineinstrs | FileCheck %s |
| |
| define double @test1(double %a, double %b) { |
| ; CHECK-LABEL: test1: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: fadd d1, d1, d1 |
| ; CHECK-NEXT: fsub d0, d0, d1 |
| ; CHECK-NEXT: ret |
| %mul = fmul double %b, -2.000000e+00 |
| %add1 = fadd double %a, %mul |
| ret double %add1 |
| } |
| |
| ; DAGCombine will canonicalize 'a - 2.0*b' to 'a + -2.0*b' |
| |
| define double @test2(double %a, double %b) { |
| ; CHECK-LABEL: test2: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: fadd d1, d1, d1 |
| ; CHECK-NEXT: fsub d0, d0, d1 |
| ; CHECK-NEXT: ret |
| %mul = fmul double %b, 2.000000e+00 |
| %add1 = fsub double %a, %mul |
| ret double %add1 |
| } |
| |
| define double @test3(double %a, double %b, double %c) { |
| ; CHECK-LABEL: test3: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: fmul d0, d0, d1 |
| ; CHECK-NEXT: fadd d1, d2, d2 |
| ; CHECK-NEXT: fsub d0, d0, d1 |
| ; CHECK-NEXT: ret |
| %mul = fmul double %a, %b |
| %mul1 = fmul double %c, 2.000000e+00 |
| %sub = fsub double %mul, %mul1 |
| ret double %sub |
| } |
| |
| define double @test4(double %a, double %b, double %c) { |
| ; CHECK-LABEL: test4: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: fmul d0, d0, d1 |
| ; CHECK-NEXT: fadd d1, d2, d2 |
| ; CHECK-NEXT: fsub d0, d0, d1 |
| ; CHECK-NEXT: ret |
| %mul = fmul double %a, %b |
| %mul1 = fmul double %c, -2.000000e+00 |
| %add2 = fadd double %mul, %mul1 |
| ret double %add2 |
| } |
| |
| define <4 x float> @fmulnegtwo_vec(<4 x float> %a, <4 x float> %b) { |
| ; CHECK-LABEL: fmulnegtwo_vec: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: fadd v1.4s, v1.4s, v1.4s |
| ; CHECK-NEXT: fsub v0.4s, v0.4s, v1.4s |
| ; CHECK-NEXT: ret |
| %mul = fmul <4 x float> %b, <float -2.0, float -2.0, float -2.0, float -2.0> |
| %add = fadd <4 x float> %a, %mul |
| ret <4 x float> %add |
| } |
| |
| define <4 x float> @fmulnegtwo_vec_commute(<4 x float> %a, <4 x float> %b) { |
| ; CHECK-LABEL: fmulnegtwo_vec_commute: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: fadd v1.4s, v1.4s, v1.4s |
| ; CHECK-NEXT: fsub v0.4s, v0.4s, v1.4s |
| ; CHECK-NEXT: ret |
| %mul = fmul <4 x float> %b, <float -2.0, float -2.0, float -2.0, float -2.0> |
| %add = fadd <4 x float> %mul, %a |
| ret <4 x float> %add |
| } |
| |
| define <4 x float> @fmulnegtwo_vec_undefs(<4 x float> %a, <4 x float> %b) { |
| ; CHECK-LABEL: fmulnegtwo_vec_undefs: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: fadd v1.4s, v1.4s, v1.4s |
| ; CHECK-NEXT: fsub v0.4s, v0.4s, v1.4s |
| ; CHECK-NEXT: ret |
| %mul = fmul <4 x float> %b, <float undef, float -2.0, float undef, float -2.0> |
| %add = fadd <4 x float> %a, %mul |
| ret <4 x float> %add |
| } |
| |
| define <4 x float> @fmulnegtwo_vec_commute_undefs(<4 x float> %a, <4 x float> %b) { |
| ; CHECK-LABEL: fmulnegtwo_vec_commute_undefs: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: fadd v1.4s, v1.4s, v1.4s |
| ; CHECK-NEXT: fsub v0.4s, v0.4s, v1.4s |
| ; CHECK-NEXT: ret |
| %mul = fmul <4 x float> %b, <float -2.0, float undef, float -2.0, float -2.0> |
| %add = fadd <4 x float> %mul, %a |
| ret <4 x float> %add |
| } |
| |
| define <4 x float> @test6(<4 x float> %a, <4 x float> %b) { |
| ; CHECK-LABEL: test6: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: fadd v1.4s, v1.4s, v1.4s |
| ; CHECK-NEXT: fsub v0.4s, v0.4s, v1.4s |
| ; CHECK-NEXT: ret |
| %mul = fmul <4 x float> %b, <float 2.0, float 2.0, float 2.0, float 2.0> |
| %add = fsub <4 x float> %a, %mul |
| ret <4 x float> %add |
| } |
| |
| ; Don't fold (fadd A, (fmul B, -2.0)) -> (fsub A, (fadd B, B)) if the fmul has |
| ; multiple uses. |
| |
| define double @test7(double %a, double %b) nounwind { |
| ; CHECK-LABEL: test7: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: str d8, [sp, #-16]! // 8-byte Folded Spill |
| ; CHECK-NEXT: fmov d2, #-2.00000000 |
| ; CHECK-NEXT: fmul d1, d1, d2 |
| ; CHECK-NEXT: fadd d8, d0, d1 |
| ; CHECK-NEXT: mov v0.16b, v1.16b |
| ; CHECK-NEXT: str x30, [sp, #8] // 8-byte Folded Spill |
| ; CHECK-NEXT: bl use |
| ; CHECK-NEXT: ldr x30, [sp, #8] // 8-byte Folded Reload |
| ; CHECK-NEXT: mov v0.16b, v8.16b |
| ; CHECK-NEXT: ldr d8, [sp], #16 // 8-byte Folded Reload |
| ; CHECK-NEXT: ret |
| %mul = fmul double %b, -2.000000e+00 |
| %add1 = fadd double %a, %mul |
| call void @use(double %mul) |
| ret double %add1 |
| } |
| |
| define float @fadd_const_multiuse_fmf(float %x) { |
| ; CHECK-LABEL: fadd_const_multiuse_fmf: |
| ; CHECK: // %bb.0: |
| ; CHECK-DAG: mov [[W59:w[0-9]+]], #1114374144 |
| ; CHECK-DAG: mov [[W42:w[0-9]+]], #1109917696 |
| ; CHECK-DAG: fmov [[FP59:s[0-9]+]], [[W59]] |
| ; CHECK-DAG: fmov [[FP42:s[0-9]+]], [[W42]] |
| ; CHECK-NEXT: fadd [[TMP1:s[0-9]+]], s0, [[FP42]] |
| ; CHECK-NEXT: fadd [[TMP2:s[0-9]+]], s0, [[FP59]] |
| ; CHECK-NEXT: fadd s0, [[TMP1]], [[TMP2]] |
| ; CHECK-NEXT: ret |
| %a1 = fadd float %x, 42.0 |
| %a2 = fadd nsz reassoc float %a1, 17.0 |
| %a3 = fadd float %a1, %a2 |
| ret float %a3 |
| } |
| |
| ; DAGCombiner transforms this into: (x + 59.0) + (x + 17.0). |
| ; The machine combiner transforms this into a chain of 3 dependent adds: |
| ; ((x + 59.0) + 17.0) + x |
| |
| define float @fadd_const_multiuse_attr(float %x) #0 { |
| ; CHECK-LABEL: fadd_const_multiuse_attr: |
| ; CHECK: // %bb.0: |
| ; CHECK-DAG: mov [[W59:w[0-9]+]], #1114374144 |
| ; CHECK-DAG: mov [[W17:w[0-9]+]], #1109917696 |
| ; CHECK-NEXT: fmov [[FP59:s[0-9]+]], [[W59]] |
| ; CHECK-NEXT: fmov [[FP17:s[0-9]+]], [[W17]] |
| ; CHECK-NEXT: fadd [[TMP1:s[0-9]+]], s0, [[FP59]] |
| ; CHECK-NEXT: fadd [[TMP2:s[0-9]+]], [[FP17]], [[TMP1]] |
| ; CHECK-NEXT: fadd s0, s0, [[TMP2]] |
| ; CHECK-NEXT: ret |
| %a1 = fadd float %x, 42.0 |
| %a2 = fadd float %a1, 17.0 |
| %a3 = fadd float %a1, %a2 |
| ret float %a3 |
| } |
| |
| attributes #0 = { "unsafe-fp-math"="true" } |
| |
| declare void @use(double) |
| |