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R600/SI: Use immediates offsets for SMRD instructions whenever possible

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There was a problem with the old pattern, so we were copying some
larger immediates into registers when we could have been encoding
them in the instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200932 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tom Stellard 2014-02-06 18:36:34 +00:00
parent 4ed2667c13
commit 22274378d5
3 changed files with 93 additions and 10 deletions
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17
lib/Target/R600/SIInstrInfo.td
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@ -75,15 +75,14 @@ def HI32f : SDNodeXForm<fpimm, [{
return CurDAG->getTargetConstantFP(APFloat(APFloat::IEEEsingle, V), MVT::f32);
}]>;
def IMM8bitDWORD : ImmLeaf <
i32, [{
return (Imm & ~0x3FC) == 0;
}], SDNodeXForm<imm, [{
return CurDAG->getTargetConstant(
N->getZExtValue() >> 2, MVT::i32);
}]>
def IMM8bitDWORD : PatLeaf <(imm),
[{return (N->getZExtValue() & ~0x3FC) == 0;}]
>;
def as_dword_i32imm : SDNodeXForm<imm, [{
return CurDAG->getTargetConstant(N->getZExtValue() >> 2, MVT::i32);
}]>;
def as_i1imm : SDNodeXForm<imm, [{
return CurDAG->getTargetConstant(N->getZExtValue(), MVT::i1);
}]>;
@ -96,6 +95,10 @@ def as_i16imm : SDNodeXForm<imm, [{
return CurDAG->getTargetConstant(N->getSExtValue(), MVT::i16);
}]>;
def as_i32imm: SDNodeXForm<imm, [{
return CurDAG->getTargetConstant(N->getSExtValue(), MVT::i32);
}]>;
def IMM12bit : PatLeaf <(imm),
[{return isUInt<12>(N->getZExtValue());}]
>;

6
lib/Target/R600/SIInstructions.td
View File

@ -1846,7 +1846,7 @@ def : Pat <
// 1. Offset as 8bit DWORD immediate
def : Pat <
(SIload_constant i128:$sbase, IMM8bitDWORD:$offset),
(S_BUFFER_LOAD_DWORD_IMM $sbase, IMM8bitDWORD:$offset)
(S_BUFFER_LOAD_DWORD_IMM $sbase, (as_dword_i32imm $offset))
>;
// 2. Offset loaded in an 32bit SGPR
@ -1926,8 +1926,8 @@ multiclass SMRD_Pattern <SMRD Instr_IMM, SMRD Instr_SGPR, ValueType vt> {
// 1. Offset as 8bit DWORD immediate
def : Pat <
(constant_load (SIadd64bit32bit i64:$sbase, IMM8bitDWORD:$offset)),
(vt (Instr_IMM $sbase, IMM8bitDWORD:$offset))
(constant_load (add i64:$sbase, (i64 IMM8bitDWORD:$offset))),
(vt (Instr_IMM $sbase, (as_dword_i32imm $offset)))
>;
// 2. Offset loaded in an 32bit SGPR

80
test/CodeGen/R600/smrd.ll Normal file
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@ -0,0 +1,80 @@
; RUN: llc < %s -march=r600 -mcpu=SI -show-mc-encoding -verify-machineinstrs | FileCheck %s
; SMRD load with an immediate offset.
; CHECK-LABEL: @smrd0
; CHECK: S_LOAD_DWORD s{{[0-9]}}, s[{{[0-9]:[0-9]}}], 1 ; encoding: [0x01
define void @smrd0(i32 addrspace(1)* %out, i32 addrspace(2)* %ptr) {
entry:
%0 = getelementptr i32 addrspace(2)* %ptr, i64 1
%1 = load i32 addrspace(2)* %0
store i32 %1, i32 addrspace(1)* %out
ret void
}
; SMRD load with the largest possible immediate offset.
; CHECK-LABEL: @smrd1
; CHECK: S_LOAD_DWORD s{{[0-9]}}, s[{{[0-9]:[0-9]}}], 255 ; encoding: [0xff
define void @smrd1(i32 addrspace(1)* %out, i32 addrspace(2)* %ptr) {
entry:
%0 = getelementptr i32 addrspace(2)* %ptr, i64 255
%1 = load i32 addrspace(2)* %0
store i32 %1, i32 addrspace(1)* %out
ret void
}
; SMRD load with an offset greater than the largest possible immediate.
; CHECK-LABEL: @smrd2
; CHECK: S_MOV_B32 s[[OFFSET:[0-9]]], 1024
; CHECK: S_LOAD_DWORD s{{[0-9]}}, s[{{[0-9]:[0-9]}}], s[[OFFSET]] ; encoding: [0x0[[OFFSET]]
define void @smrd2(i32 addrspace(1)* %out, i32 addrspace(2)* %ptr) {
entry:
%0 = getelementptr i32 addrspace(2)* %ptr, i64 256
%1 = load i32 addrspace(2)* %0
store i32 %1, i32 addrspace(1)* %out
ret void
}
; SMRD load using the load.const intrinsic with an immediate offset
; CHECK-LABEL: @smrd_load_const0
; CHECK: S_BUFFER_LOAD_DWORD s{{[0-9]}}, s[{{[0-9]:[0-9]}}], 4 ; encoding: [0x04
define void @smrd_load_const0(<16 x i8> addrspace(2)* inreg, <16 x i8> addrspace(2)* inreg, <32 x i8> addrspace(2)* inreg, i32 inreg, <2 x i32>, <2 x i32>, <2 x i32>, <3 x i32>, <2 x i32>, <2 x i32>, <2 x i32>, float, float, float, float, float, float, float, float, float) #0 {
main_body:
%20 = getelementptr <16 x i8> addrspace(2)* %0, i32 0
%21 = load <16 x i8> addrspace(2)* %20
%22 = call float @llvm.SI.load.const(<16 x i8> %21, i32 16)
call void @llvm.SI.export(i32 15, i32 1, i32 1, i32 0, i32 0, float %22, float %22, float %22, float %22)
ret void
}
; SMRD load using the load.const intrinsic with an offset greater largest possible
; immediate offset.
; CHECK-LABEL: @smrd_load_const1
; CHECK: S_BUFFER_LOAD_DWORD s{{[0-9]}}, s[{{[0-9]:[0-9]}}], 255 ; encoding: [0xff
define void @smrd_load_const1(<16 x i8> addrspace(2)* inreg, <16 x i8> addrspace(2)* inreg, <32 x i8> addrspace(2)* inreg, i32 inreg, <2 x i32>, <2 x i32>, <2 x i32>, <3 x i32>, <2 x i32>, <2 x i32>, <2 x i32>, float, float, float, float, float, float, float, float, float) #0 {
main_body:
%20 = getelementptr <16 x i8> addrspace(2)* %0, i32 0
%21 = load <16 x i8> addrspace(2)* %20
%22 = call float @llvm.SI.load.const(<16 x i8> %21, i32 1020)
call void @llvm.SI.export(i32 15, i32 1, i32 1, i32 0, i32 0, float %22, float %22, float %22, float %22)
ret void
}
; SMRD load using the load.const intrinsic with the largetst possible
; immediate offset.
; CHECK-LABEL: @smrd_load_const2
; CHECK: S_BUFFER_LOAD_DWORD s{{[0-9]}}, s[{{[0-9]:[0-9]}}], s[[OFFSET]] ; encoding: [0x0[[OFFSET]]
define void @smrd_load_const2(<16 x i8> addrspace(2)* inreg, <16 x i8> addrspace(2)* inreg, <32 x i8> addrspace(2)* inreg, i32 inreg, <2 x i32>, <2 x i32>, <2 x i32>, <3 x i32>, <2 x i32>, <2 x i32>, <2 x i32>, float, float, float, float, float, float, float, float, float) #0 {
main_body:
%20 = getelementptr <16 x i8> addrspace(2)* %0, i32 0
%21 = load <16 x i8> addrspace(2)* %20
%22 = call float @llvm.SI.load.const(<16 x i8> %21, i32 1024)
call void @llvm.SI.export(i32 15, i32 1, i32 1, i32 0, i32 0, float %22, float %22, float %22, float %22)
ret void
}
; Function Attrs: nounwind readnone
declare float @llvm.SI.load.const(<16 x i8>, i32) #1
declare void @llvm.SI.export(i32, i32, i32, i32, i32, float, float, float, float)
attributes #0 = { "ShaderType"="0" }
attributes #1 = { nounwind readnone }