AMDGPU: Remove AMDGPU.fract intrinsic

Mesa doesn't use this, and this is pattern matched already
from fsub x, (ffloor x)

llvm-svn: 258513

8 files changed, 88 insertions, 78 deletions

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUIntrinsics.td b/llvm/lib/Target/AMDGPU/AMDGPUIntrinsics.td
index 4e93ed4212a..1865a561e25 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUIntrinsics.td
+++ b/llvm/lib/Target/AMDGPU/AMDGPUIntrinsics.td
@@ -19,7 +19,6 @@ let TargetPrefix = "AMDGPU", isTarget = 1 in {
   def int_AMDGPU_arl : Intrinsic<[llvm_i32_ty], [llvm_float_ty], [IntrNoMem]>;
   def int_AMDGPU_cndlt : Intrinsic<[llvm_float_ty], [llvm_float_ty, llvm_float_ty, llvm_float_ty], [IntrNoMem]>;
   def int_AMDGPU_div : Intrinsic<[llvm_float_ty], [llvm_float_ty, llvm_float_ty], [IntrNoMem]>;
-  def int_AMDGPU_fract : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>], [IntrNoMem]>;
   def int_AMDGPU_clamp : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>, LLVMMatchType<0>, LLVMMatchType<0>], [IntrNoMem]>;
 
   // This is named backwards (instead of rsq_legacy) so we don't have
diff --git a/llvm/lib/Target/AMDGPU/R600ISelLowering.cpp b/llvm/lib/Target/AMDGPU/R600ISelLowering.cpp
index 6ce2bd25e13..2e10f41d26c 100644
--- a/llvm/lib/Target/AMDGPU/R600ISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/R600ISelLowering.cpp
@@ -851,9 +851,6 @@ SDValue R600TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const
     case Intrinsic::AMDGPU_rsq:
       // XXX - I'm assuming SI's RSQ_LEGACY matches R600's behavior.
       return DAG.getNode(AMDGPUISD::RSQ_LEGACY, DL, VT, Op.getOperand(1));
-
-    case AMDGPUIntrinsic::AMDGPU_fract:
-      return DAG.getNode(AMDGPUISD::FRACT, DL, VT, Op.getOperand(1));
     }
     // break out of case ISD::INTRINSIC_WO_CHAIN in switch(Op.getOpcode())
     break;
diff --git a/llvm/lib/Target/AMDGPU/R600Instructions.td b/llvm/lib/Target/AMDGPU/R600Instructions.td
index 33ef6a4e19e..72e6f862675 100644
--- a/llvm/lib/Target/AMDGPU/R600Instructions.td
+++ b/llvm/lib/Target/AMDGPU/R600Instructions.td
@@ -733,6 +733,7 @@ def SETNE_DX10 : R600_2OP <
   [(set i32:$dst, (selectcc f32:$src0, f32:$src1, -1, 0, COND_UNE_NE))]
 >;
 
+// FIXME: Need combine for AMDGPUfract
 def FRACT : R600_1OP_Helper <0x10, "FRACT", AMDGPUfract>;
 def TRUNC : R600_1OP_Helper <0x11, "TRUNC", ftrunc>;
 def CEIL : R600_1OP_Helper <0x12, "CEIL", fceil>;
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
index 104b909c4e8..efd8075dde4 100644
--- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
@@ -1361,9 +1361,6 @@ SDValue SITargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
                        Op.getOperand(2),
                        Op.getOperand(3));
 
-  case AMDGPUIntrinsic::AMDGPU_fract: // Legacy name.
-    return DAG.getNode(ISD::FSUB, DL, VT, Op.getOperand(1),
-                       DAG.getNode(ISD::FFLOOR, DL, VT, Op.getOperand(1)));
   case AMDGPUIntrinsic::SI_fs_constant: {
     SDValue M0 = copyToM0(DAG, DAG.getEntryNode(), DL, Op.getOperand(3));
     SDValue Glue = M0.getValue(1);
diff --git a/llvm/test/CodeGen/AMDGPU/llvm.AMDGPU.fract.f64.ll b/llvm/test/CodeGen/AMDGPU/fract.f64.ll
index 6049dca0401..a19259fdf24 100644
--- a/llvm/test/CodeGen/AMDGPU/llvm.AMDGPU.fract.f64.ll
+++ b/llvm/test/CodeGen/AMDGPU/fract.f64.ll
@@ -1,9 +1,9 @@
-; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs -enable-unsafe-fp-math < %s | FileCheck -check-prefix=GCN -check-prefix=SI -check-prefix=FUNC %s
-; RUN: llc -march=amdgcn -mcpu=bonaire -verify-machineinstrs -enable-unsafe-fp-math < %s | FileCheck -check-prefix=GCN -check-prefix=CI -check-prefix=FUNC %s
-; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs -enable-unsafe-fp-math < %s | FileCheck -check-prefix=GCN -check-prefix=CI -check-prefix=FUNC %s
+; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=SI -check-prefix=FUNC %s
+; RUN: llc -march=amdgcn -mcpu=bonaire -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=CI -check-prefix=FUNC %s
+; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=CI -check-prefix=FUNC %s
 
-declare double @llvm.fabs.f64(double %Val)
-declare double @llvm.AMDGPU.fract.f64(double) nounwind readnone
+declare double @llvm.fabs.f64(double) #0
+declare double @llvm.floor.f64(double) #0
 
 ; FUNC-LABEL: {{^}}fract_f64:
 ; GCN: v_fract_f64_e32 [[FRC:v\[[0-9]+:[0-9]+\]]], v{{\[}}[[LO:[0-9]+]]:[[HI:[0-9]+]]]
@@ -15,10 +15,11 @@ declare double @llvm.AMDGPU.fract.f64(double) nounwind readnone
 ; SI: v_cndmask_b32_e64 v[[RESHI:[0-9]+]], v[[MINHI]], v[[HI]], [[COND]]
 ; SI: buffer_store_dwordx2 v{{\[}}[[RESLO]]:[[RESHI]]]
 ; CI: buffer_store_dwordx2 [[FRC]]
-define void @fract_f64(double addrspace(1)* %out, double addrspace(1)* %src) nounwind {
-  %val = load double, double addrspace(1)* %src, align 4
-  %fract = call double @llvm.AMDGPU.fract.f64(double %val) nounwind readnone
-  store double %fract, double addrspace(1)* %out, align 4
+define void @fract_f64(double addrspace(1)* %out, double addrspace(1)* %src) #1 {
+  %x = load double, double addrspace(1)* %src
+  %floor.x = call double @llvm.floor.f64(double %x)
+  %fract = fsub double %x, %floor.x
+  store double %fract, double addrspace(1)* %out
   ret void
 }
 
@@ -32,11 +33,12 @@ define void @fract_f64(double addrspace(1)* %out, double addrspace(1)* %src) nou
 ; SI: v_cndmask_b32_e64 v[[RESHI:[0-9]+]], v[[MINHI]], v[[HI]], [[COND]]
 ; SI: buffer_store_dwordx2 v{{\[}}[[RESLO]]:[[RESHI]]]
 ; CI: buffer_store_dwordx2 [[FRC]]
-define void @fract_f64_neg(double addrspace(1)* %out, double addrspace(1)* %src) nounwind {
-  %val = load double, double addrspace(1)* %src, align 4
-  %neg = fsub double 0.0, %val
-  %fract = call double @llvm.AMDGPU.fract.f64(double %neg) nounwind readnone
-  store double %fract, double addrspace(1)* %out, align 4
+define void @fract_f64_neg(double addrspace(1)* %out, double addrspace(1)* %src) #1 {
+  %x = load double, double addrspace(1)* %src
+  %neg.x = fsub double -0.0, %x
+  %floor.neg.x = call double @llvm.floor.f64(double %neg.x)
+  %fract = fsub double %neg.x, %floor.neg.x
+  store double %fract, double addrspace(1)* %out
   ret void
 }
 
@@ -50,11 +52,15 @@ define void @fract_f64_neg(double addrspace(1)* %out, double addrspace(1)* %src)
 ; SI: v_cndmask_b32_e64 v[[RESHI:[0-9]+]], v[[MINHI]], v[[HI]], [[COND]]
 ; SI: buffer_store_dwordx2 v{{\[}}[[RESLO]]:[[RESHI]]]
 ; CI: buffer_store_dwordx2 [[FRC]]
-define void @fract_f64_neg_abs(double addrspace(1)* %out, double addrspace(1)* %src) nounwind {
-  %val = load double, double addrspace(1)* %src, align 4
-  %abs = call double @llvm.fabs.f64(double %val)
-  %neg = fsub double 0.0, %abs
-  %fract = call double @llvm.AMDGPU.fract.f64(double %neg) nounwind readnone
-  store double %fract, double addrspace(1)* %out, align 4
+define void @fract_f64_neg_abs(double addrspace(1)* %out, double addrspace(1)* %src) #1 {
+  %x = load double, double addrspace(1)* %src
+  %abs.x = call double @llvm.fabs.f64(double %x)
+  %neg.abs.x = fsub double -0.0, %abs.x
+  %floor.neg.abs.x = call double @llvm.floor.f64(double %neg.abs.x)
+  %fract = fsub double %neg.abs.x, %floor.neg.abs.x
+  store double %fract, double addrspace(1)* %out
   ret void
 }
+
+attributes #0 = { nounwind readnone }
+attributes #1 = { nounwind }
diff --git a/llvm/test/CodeGen/AMDGPU/fract.ll b/llvm/test/CodeGen/AMDGPU/fract.ll
new file mode 100644
index 00000000000..5434248c634
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/fract.ll
@@ -0,0 +1,58 @@
+; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=SI -check-prefix=FUNC %s
+; RUN: llc -march=amdgcn -mcpu=bonaire -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=CI -check-prefix=FUNC %s
+; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=CI -check-prefix=FUNC %s
+; XUN: llc -march=r600 -mcpu=cypress -verify-machineinstrs < %s | FileCheck -check-prefix=EG -check-prefix=FUNC %s
+
+declare float @llvm.fabs.f32(float) #0
+declare float @llvm.floor.f32(float) #0
+
+; FUNC-LABEL: {{^}}fract_f32:
+; CI: v_fract_f32_e32 [[RESULT:v[0-9]+]], [[INPUT:v[0-9]+]]
+; SI: v_floor_f32_e32 [[FLR:v[0-9]+]], [[INPUT:v[0-9]+]]
+; SI: v_subrev_f32_e32 [[RESULT:v[0-9]+]], [[FLR]], [[INPUT]]
+; GCN: buffer_store_dword [[RESULT]]
+
+; XEG: FRACT
+define void @fract_f32(float addrspace(1)* %out, float addrspace(1)* %src) #1 {
+  %x = load float, float addrspace(1)* %src
+  %floor.x = call float @llvm.floor.f32(float %x)
+  %fract = fsub float %x, %floor.x
+  store float %fract, float addrspace(1)* %out
+  ret void
+}
+
+; FUNC-LABEL: {{^}}fract_f32_neg:
+; CI: v_fract_f32_e64 [[RESULT:v[0-9]+]], -[[INPUT:v[0-9]+]]
+; SI: v_floor_f32_e64 [[FLR:v[0-9]+]], -[[INPUT:v[0-9]+]]
+; SI: v_sub_f32_e64 [[RESULT:v[0-9]+]], -[[INPUT]], [[FLR]]
+; GCN: buffer_store_dword [[RESULT]]
+
+; XEG: FRACT
+define void @fract_f32_neg(float addrspace(1)* %out, float addrspace(1)* %src) #1 {
+  %x = load float, float addrspace(1)* %src
+  %x.neg = fsub float -0.0, %x
+  %floor.x.neg = call float @llvm.floor.f32(float %x.neg)
+  %fract = fsub float %x.neg, %floor.x.neg
+  store float %fract, float addrspace(1)* %out
+  ret void
+}
+
+; FUNC-LABEL: {{^}}fract_f32_neg_abs:
+; CI: v_fract_f32_e64 [[RESULT:v[0-9]+]], -|[[INPUT:v[0-9]+]]|
+; SI: v_floor_f32_e64 [[FLR:v[0-9]+]], -|[[INPUT:v[0-9]+]]|
+; SI: v_sub_f32_e64 [[RESULT:v[0-9]+]], -|[[INPUT]]|, [[FLR]]
+; GCN: buffer_store_dword [[RESULT]]
+
+; XEG: FRACT
+define void @fract_f32_neg_abs(float addrspace(1)* %out, float addrspace(1)* %src) #1 {
+  %x = load float, float addrspace(1)* %src
+  %abs.x = call float @llvm.fabs.f32(float %x)
+  %neg.abs.x = fsub float -0.0, %abs.x
+  %floor.neg.abs.x = call float @llvm.floor.f32(float %neg.abs.x)
+  %fract = fsub float %neg.abs.x, %floor.neg.abs.x
+  store float %fract, float addrspace(1)* %out
+  ret void
+}
+
+attributes #0 = { nounwind readnone }
+attributes #1 = { nounwind }
diff --git a/llvm/test/CodeGen/AMDGPU/llvm.AMDGPU.fract.ll b/llvm/test/CodeGen/AMDGPU/llvm.AMDGPU.fract.ll
deleted file mode 100644
index c53837a7e44..00000000000
--- a/llvm/test/CodeGen/AMDGPU/llvm.AMDGPU.fract.ll
+++ /dev/null
@@ -1,49 +0,0 @@
-; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs -enable-unsafe-fp-math < %s | FileCheck -check-prefix=GCN -check-prefix=SI -check-prefix=FUNC %s
-; RUN: llc -march=amdgcn -mcpu=bonaire -verify-machineinstrs -enable-unsafe-fp-math < %s | FileCheck -check-prefix=GCN -check-prefix=CI -check-prefix=FUNC %s
-; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs -enable-unsafe-fp-math < %s | FileCheck -check-prefix=GCN -check-prefix=CI -check-prefix=FUNC %s
-; RUN: llc -march=r600 -mcpu=cypress -verify-machineinstrs -enable-unsafe-fp-math < %s | FileCheck -check-prefix=EG -check-prefix=FUNC %s
-
-declare float @llvm.fabs.f32(float  %Val)
-declare float @llvm.AMDGPU.fract.f32(float) nounwind readnone
-
-; FUNC-LABEL: {{^}}fract_f32:
-; CI: v_fract_f32_e32 [[RESULT:v[0-9]+]], [[INPUT:v[0-9]+]]
-; SI: v_floor_f32_e32 [[FLR:v[0-9]+]], [[INPUT:v[0-9]+]]
-; SI: v_subrev_f32_e32 [[RESULT:v[0-9]+]], [[FLR]], [[INPUT]]
-; GCN: buffer_store_dword [[RESULT]]
-; EG: FRACT
-define void @fract_f32(float addrspace(1)* %out, float addrspace(1)* %src) nounwind {
-  %val = load float, float addrspace(1)* %src, align 4
-  %fract = call float @llvm.AMDGPU.fract.f32(float %val) nounwind readnone
-  store float %fract, float addrspace(1)* %out, align 4
-  ret void
-}
-
-; FUNC-LABEL: {{^}}fract_f32_neg:
-; CI: v_fract_f32_e64 [[RESULT:v[0-9]+]], -[[INPUT:v[0-9]+]]
-; SI: v_floor_f32_e64 [[FLR:v[0-9]+]], -[[INPUT:v[0-9]+]]
-; SI: v_sub_f32_e64 [[RESULT:v[0-9]+]], -[[INPUT]], [[FLR]]
-; GCN: buffer_store_dword [[RESULT]]
-; EG: FRACT
-define void @fract_f32_neg(float addrspace(1)* %out, float addrspace(1)* %src) nounwind {
-  %val = load float, float addrspace(1)* %src, align 4
-  %neg = fsub float 0.0, %val
-  %fract = call float @llvm.AMDGPU.fract.f32(float %neg) nounwind readnone
-  store float %fract, float addrspace(1)* %out, align 4
-  ret void
-}
-
-; FUNC-LABEL: {{^}}fract_f32_neg_abs:
-; CI: v_fract_f32_e64 [[RESULT:v[0-9]+]], -|[[INPUT:v[0-9]+]]|
-; SI: v_floor_f32_e64 [[FLR:v[0-9]+]], -|[[INPUT:v[0-9]+]]|
-; SI: v_sub_f32_e64 [[RESULT:v[0-9]+]], -|[[INPUT]]|, [[FLR]]
-; GCN: buffer_store_dword [[RESULT]]
-; EG: FRACT
-define void @fract_f32_neg_abs(float addrspace(1)* %out, float addrspace(1)* %src) nounwind {
-  %val = load float, float addrspace(1)* %src, align 4
-  %abs = call float @llvm.fabs.f32(float %val)
-  %neg = fsub float 0.0, %abs
-  %fract = call float @llvm.AMDGPU.fract.f32(float %neg) nounwind readnone
-  store float %fract, float addrspace(1)* %out, align 4
-  ret void
-}
diff --git a/llvm/test/CodeGen/AMDGPU/si-spill-cf.ll b/llvm/test/CodeGen/AMDGPU/si-spill-cf.ll
index 2cb919f1634..b6f1b8236b2 100644
--- a/llvm/test/CodeGen/AMDGPU/si-spill-cf.ll
+++ b/llvm/test/CodeGen/AMDGPU/si-spill-cf.ll
@@ -256,7 +256,8 @@ ELSE2584:                                         ; preds = %IF2565
 ENDIF2582:                                        ; preds = %ELSE2584, %IF2565
   %213 = fadd float %1, undef
   %214 = fadd float 0.000000e+00, %213
-  %215 = call float @llvm.AMDGPU.fract.f32(float %214)
+  %floor = call float @llvm.floor.f32(float %214)
+  %215 = fsub float %214, %floor
   br i1 undef, label %IF2589, label %ELSE2590
 
 IF2589:                                           ; preds = %ENDIF2582
@@ -480,7 +481,7 @@ ELSE2824:                                         ; preds = %ELSE2821
 declare float @llvm.SI.load.const(<16 x i8>, i32) #1
 
 ; Function Attrs: nounwind readnone
-declare float @llvm.AMDGPU.fract.f32(float) #1
+declare float @llvm.floor.f32(float) #1
 
 ; Function Attrs: nounwind readnone
 declare float @llvm.sqrt.f32(float) #1