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Revert "[AArch64] Properly validate the reciprocal estimation."
This reverts commit ad8ca1528242e2a4cb363e3779309e70eb7a430e per request by Eric Christopher <echristo@gmail.com> (v. http://bit.ly/2cmz6kW). llvm-svn: 281999
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@ -4594,12 +4594,6 @@ static SDValue getEstimate(const AArch64Subtarget &ST,
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return SDValue();
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EVT VT = Operand.getValueType();
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if (VT != MVT::f64 && VT != MVT::v1f64 && VT != MVT::v2f64 &&
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VT != MVT::f32 && VT != MVT::v1f32 &&
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VT != MVT::v2f32 && VT != MVT::v4f32 &&
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(!ST.hasFullFP16() ||
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(VT != MVT::f16 && VT != MVT::v4f16 && VT != MVT::v8f16)))
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return SDValue();
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std::string RecipOp;
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RecipOp = Opcode == (AArch64ISD::FRECPE) ? "div": "sqrt";
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@ -46,23 +46,6 @@ define <4 x float> @f4recp(<4 x float> %x) #0 {
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; CHECK-NEXT: frecpe
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}
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define <8 x float> @f8recp(<8 x float> %x) #0 {
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%div = fdiv fast <8 x float> <float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0>, %x
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ret <8 x float> %div
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; FAULT-LABEL: f8recp:
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; FAULT-NEXT: BB#0
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; FAULT-NEXT: fmov
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; FAULT-NEXT: fdiv
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; FAULT-NEXT: fdiv
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; CHECK-LABEL: f8recp:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: fmov
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; CHECK-NEXT: frecpe
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; CHECK: frecpe
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}
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define double @drecp(double %x) #0 {
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%div = fdiv fast double 1.0, %x
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ret double %div
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@ -93,21 +76,4 @@ define <2 x double> @d2recp(<2 x double> %x) #0 {
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; CHECK-NEXT: frecpe
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}
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define <4 x double> @d4recp(<4 x double> %x) #0 {
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%div = fdiv fast <4 x double> <double 1.0, double 1.0, double 1.0, double 1.0>, %x
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ret <4 x double> %div
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; FAULT-LABEL: d4recp:
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; FAULT-NEXT: BB#0
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; FAULT-NEXT: fmov
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; FAULT-NEXT: fdiv
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; FAULT-NEXT: fdiv
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; CHECK-LABEL: d4recp:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: fmov
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; CHECK-NEXT: frecpe
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; CHECK: frecpe
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}
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attributes #0 = { nounwind "unsafe-fp-math"="true" }
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@ -1,15 +1,13 @@
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; RUN: llc < %s -mtriple=aarch64 -mattr=neon -recip=!sqrt,!vec-sqrt | FileCheck %s --check-prefix=FAULT
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; RUN: llc < %s -mtriple=aarch64 -mattr=neon,-use-reverse-square-root | FileCheck %s --check-prefix=FAULT
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; RUN: llc < %s -mtriple=aarch64 -mattr=neon -recip=sqrt,vec-sqrt | FileCheck %s
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; RUN: llc < %s -mtriple=aarch64 -mattr=neon -recip=!sqrt,!vec-sqrt | FileCheck %s --check-prefix=FAULT
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; RUN: llc < %s -mtriple=aarch64 -mattr=neon -recip=sqrt,vec-sqrt | FileCheck %s
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; RUN: llc < %s -mtriple=aarch64 -mattr=neon,-use-reverse-square-root | FileCheck %s --check-prefix=FAULT
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; RUN: llc < %s -mtriple=aarch64 -mattr=neon,+use-reverse-square-root | FileCheck %s
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declare float @llvm.sqrt.f32(float) #1
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declare double @llvm.sqrt.f64(double) #1
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declare <2 x float> @llvm.sqrt.v2f32(<2 x float>) #1
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declare <4 x float> @llvm.sqrt.v4f32(<4 x float>) #1
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declare <8 x float> @llvm.sqrt.v8f32(<8 x float>) #1
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declare double @llvm.sqrt.f64(double) #1
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declare <2 x double> @llvm.sqrt.v2f64(<2 x double>) #1
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declare <4 x double> @llvm.sqrt.v4f64(<4 x double>) #1
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define float @fsqrt(float %a) #0 {
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%1 = tail call fast float @llvm.sqrt.f32(float %a)
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@ -55,23 +53,6 @@ define <4 x float> @f4sqrt(<4 x float> %a) #0 {
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; CHECK-NEXT: frsqrte
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}
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define <8 x float> @f8sqrt(<8 x float> %a) #0 {
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%1 = tail call fast <8 x float> @llvm.sqrt.v8f32(<8 x float> %a) #2
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ret <8 x float> %1
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; FAULT-LABEL: f8sqrt:
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; FAULT-NEXT: BB#0
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; FAULT-NEXT: fsqrt
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; FAULT-NEXT: fsqrt
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; CHECK-LABEL: f8sqrt:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: fmov
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; CHECK-NEXT: mov
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; CHECK-NEXT: frsqrte
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; CHECK: frsqrte
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}
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define double @dsqrt(double %a) #0 {
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%1 = tail call fast double @llvm.sqrt.f64(double %a)
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ret double %1
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@ -101,23 +82,6 @@ define <2 x double> @d2sqrt(<2 x double> %a) #0 {
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; CHECK-NEXT: frsqrte
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}
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define <4 x double> @d4sqrt(<4 x double> %a) #0 {
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%1 = tail call fast <4 x double> @llvm.sqrt.v4f64(<4 x double> %a) #4
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ret <4 x double> %1
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; FAULT-LABEL: d4sqrt:
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; FAULT-NEXT: BB#0
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; FAULT-NEXT: fsqrt
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; FAULT-NEXT: fsqrt
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; CHECK-LABEL: d4sqrt:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: fmov
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; CHECK-NEXT: mov
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; CHECK-NEXT: frsqrte
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; CHECK: frsqrte
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}
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define float @frsqrt(float %a) #0 {
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%1 = tail call fast float @llvm.sqrt.f32(float %a)
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%2 = fdiv fast float 1.000000e+00, %1
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@ -163,23 +127,6 @@ define <4 x float> @f4rsqrt(<4 x float> %a) #0 {
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; CHECK-NEXT: frsqrte
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}
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define <8 x float> @f8rsqrt(<8 x float> %a) #0 {
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%1 = tail call fast <8 x float> @llvm.sqrt.v8f32(<8 x float> %a) #2
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%2 = fdiv fast <8 x float> <float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00>, %1
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ret <8 x float> %2
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; FAULT-LABEL: f8rsqrt:
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; FAULT-NEXT: BB#0
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; FAULT-NEXT: fsqrt
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; FAULT-NEXT: fsqrt
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; CHECK-LABEL: f8rsqrt:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: fmov
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; CHECK-NEXT: frsqrte
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; CHECK: frsqrte
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}
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define double @drsqrt(double %a) #0 {
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%1 = tail call fast double @llvm.sqrt.f64(double %a)
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%2 = fdiv fast double 1.000000e+00, %1
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@ -210,21 +157,4 @@ define <2 x double> @d2rsqrt(<2 x double> %a) #0 {
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; CHECK-NEXT: frsqrte
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}
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define <4 x double> @d4rsqrt(<4 x double> %a) #0 {
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%1 = tail call fast <4 x double> @llvm.sqrt.v4f64(<4 x double> %a) #4
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%2 = fdiv fast <4 x double> <double 1.000000e+00, double 1.000000e+00, double 1.000000e+00, double 1.000000e+00>, %1
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ret <4 x double> %2
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; FAULT-LABEL: d4rsqrt:
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; FAULT-NEXT: BB#0
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; FAULT-NEXT: fsqrt
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; FAULT-NEXT: fsqrt
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; CHECK-LABEL: d4rsqrt:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: fmov
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; CHECK-NEXT: frsqrte
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; CHECK: frsqrte
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}
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attributes #0 = { nounwind "unsafe-fp-math"="true" }
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