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AMDGPU/GlobalISel: Look through copies for source modifiers 

When all VOP instructions are legalized to VGPRs, any SGPR source
modifiers will have a copy in the way.
This commit is contained in:
Matt Arsenault 2020-01-25 20:25:37 -05:00
parent c2ad7ee1a9
commit 94e8ef4d4c
5 changed files with 10 additions and 33 deletions
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4
llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
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@ -1990,12 +1990,12 @@ std::pair<Register, unsigned>
AMDGPUInstructionSelector::selectVOP3ModsImpl(
Register Src) const {
unsigned Mods = 0;
MachineInstr *MI = MRI->getVRegDef(Src);
MachineInstr *MI = getDefIgnoringCopies(Src, *MRI);
if (MI && MI->getOpcode() == AMDGPU::G_FNEG) {
Src = MI->getOperand(1).getReg();
Mods |= SISrcMods::NEG;
MI = MRI->getVRegDef(Src);
MI = getDefIgnoringCopies(Src, *MRI);
}
if (MI && MI->getOpcode() == AMDGPU::G_FABS) {

11
llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-fadd.s32.mir
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@ -165,10 +165,7 @@ body: |
; GFX6-LABEL: name: fadd_s32_fneg_copy_sgpr
; GFX6: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
; GFX6: [[COPY1:%[0-9]+]]:sreg_32 = COPY $sgpr0
; GFX6: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 2147483648
; GFX6: [[S_XOR_B32_:%[0-9]+]]:sreg_32 = S_XOR_B32 [[COPY1]], [[S_MOV_B32_]], implicit-def $scc
; GFX6: [[COPY2:%[0-9]+]]:vgpr_32 = COPY [[S_XOR_B32_]]
; GFX6: [[V_ADD_F32_e64_:%[0-9]+]]:vgpr_32 = V_ADD_F32_e64 0, [[COPY]], 0, [[COPY2]], 0, 0, implicit $exec
; GFX6: [[V_ADD_F32_e64_:%[0-9]+]]:vgpr_32 = V_ADD_F32_e64 0, [[COPY]], 1, [[COPY1]], 0, 0, implicit $exec
; GFX6: S_ENDPGM 0, implicit [[V_ADD_F32_e64_]]
%0:vgpr(s32) = COPY $vgpr0
%1:sgpr(s32) = COPY $sgpr0
@ -193,11 +190,7 @@ body: |
; GFX6-LABEL: name: fadd_s32_copy_fneg_copy_fabs
; GFX6: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
; GFX6: [[COPY1:%[0-9]+]]:sreg_32 = COPY $sgpr0
; GFX6: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 2147483647
; GFX6: [[S_AND_B32_:%[0-9]+]]:sreg_32 = S_AND_B32 [[COPY1]], [[S_MOV_B32_]], implicit-def $scc
; GFX6: [[S_MOV_B32_1:%[0-9]+]]:sreg_32 = S_MOV_B32 2147483648
; GFX6: [[S_XOR_B32_:%[0-9]+]]:sreg_32 = S_XOR_B32 [[S_AND_B32_]], [[S_MOV_B32_1]], implicit-def $scc
; GFX6: [[V_ADD_F32_e64_:%[0-9]+]]:vgpr_32 = V_ADD_F32_e64 0, [[COPY]], 0, [[S_XOR_B32_]], 0, 0, implicit $exec
; GFX6: [[V_ADD_F32_e64_:%[0-9]+]]:vgpr_32 = V_ADD_F32_e64 0, [[COPY]], 3, [[COPY1]], 0, 0, implicit $exec
; GFX6: S_ENDPGM 0, implicit [[V_ADD_F32_e64_]]
%0:vgpr(s32) = COPY $vgpr0
%1:sgpr(s32) = COPY $sgpr0

8
llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-fadd.s64.mir
View File

@ -166,13 +166,7 @@ body: |
; GFX6-LABEL: name: fadd_s64_fneg_copy_sgpr
; GFX6: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr0_vgpr1
; GFX6: [[COPY1:%[0-9]+]]:sreg_64 = COPY $sgpr0_sgpr1
; GFX6: [[COPY2:%[0-9]+]]:sreg_32 = COPY [[COPY1]].sub0
; GFX6: [[COPY3:%[0-9]+]]:sreg_32 = COPY [[COPY1]].sub1
; GFX6: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 2147483648
; GFX6: [[S_XOR_B32_:%[0-9]+]]:sreg_32 = S_XOR_B32 [[COPY3]], [[S_MOV_B32_]], implicit-def $scc
; GFX6: [[REG_SEQUENCE:%[0-9]+]]:sreg_64 = REG_SEQUENCE [[COPY2]], %subreg.sub0, [[S_XOR_B32_]], %subreg.sub1
; GFX6: [[COPY4:%[0-9]+]]:vreg_64 = COPY [[REG_SEQUENCE]]
; GFX6: [[V_ADD_F64_:%[0-9]+]]:vreg_64 = V_ADD_F64 0, [[COPY]], 0, [[COPY4]], 0, 0, implicit $exec
; GFX6: [[V_ADD_F64_:%[0-9]+]]:vreg_64 = V_ADD_F64 0, [[COPY]], 1, [[COPY1]], 0, 0, implicit $exec
; GFX6: S_ENDPGM 0, implicit [[V_ADD_F64_]]
%0:vgpr(s64) = COPY $vgpr0_vgpr1
%1:sgpr(s64) = COPY $sgpr0_sgpr1

12
llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-fma.s32.mir
View File

@ -206,26 +206,20 @@ body: |
; GFX6: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
; GFX6: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
; GFX6: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr2
; GFX6: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 2147483648
; GFX6: [[V_XOR_B32_e32_:%[0-9]+]]:vgpr_32 = V_XOR_B32_e32 [[S_MOV_B32_]], [[COPY2]], implicit $exec
; GFX6: [[V_FMA_F32_:%[0-9]+]]:vgpr_32 = V_FMA_F32 0, [[COPY]], 0, [[COPY1]], 0, [[V_XOR_B32_e32_]], 0, 0, implicit $exec
; GFX6: [[V_FMA_F32_:%[0-9]+]]:vgpr_32 = V_FMA_F32 0, [[COPY]], 0, [[COPY1]], 1, [[COPY2]], 0, 0, implicit $exec
; GFX6: S_ENDPGM 0, implicit [[V_FMA_F32_]]
; GFX9-DL-LABEL: name: fma_f32_copy_fneg_src2
; GFX9-DL: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
; GFX9-DL: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
; GFX9-DL: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr2
; GFX9-DL: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 2147483648
; GFX9-DL: [[V_XOR_B32_e32_:%[0-9]+]]:vgpr_32 = V_XOR_B32_e32 [[S_MOV_B32_]], [[COPY2]], implicit $exec
; GFX9-DL: [[V_FMA_F32_:%[0-9]+]]:vgpr_32 = V_FMA_F32 0, [[COPY]], 0, [[COPY1]], 0, [[V_XOR_B32_e32_]], 0, 0, implicit $exec
; GFX9-DL: [[V_FMA_F32_:%[0-9]+]]:vgpr_32 = V_FMA_F32 0, [[COPY]], 0, [[COPY1]], 1, [[COPY2]], 0, 0, implicit $exec
; GFX9-DL: S_ENDPGM 0, implicit [[V_FMA_F32_]]
; GFX10-LABEL: name: fma_f32_copy_fneg_src2
; GFX10: $vcc_hi = IMPLICIT_DEF
; GFX10: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
; GFX10: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
; GFX10: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr2
; GFX10: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 2147483648
; GFX10: [[V_XOR_B32_e32_:%[0-9]+]]:vgpr_32 = V_XOR_B32_e32 [[S_MOV_B32_]], [[COPY2]], implicit $exec
; GFX10: [[V_FMA_F32_:%[0-9]+]]:vgpr_32 = V_FMA_F32 0, [[COPY]], 0, [[COPY1]], 0, [[V_XOR_B32_e32_]], 0, 0, implicit $exec
; GFX10: [[V_FMA_F32_:%[0-9]+]]:vgpr_32 = V_FMA_F32 0, [[COPY]], 0, [[COPY1]], 1, [[COPY2]], 0, 0, implicit $exec
; GFX10: S_ENDPGM 0, implicit [[V_FMA_F32_]]
%0:vgpr(s32) = COPY $vgpr0
%1:vgpr(s32) = COPY $vgpr1

8
llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-fmad.s32.mir
View File

@ -175,18 +175,14 @@ body: |
; GFX6: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
; GFX6: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
; GFX6: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr2
; GFX6: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 2147483648
; GFX6: [[V_XOR_B32_e32_:%[0-9]+]]:vgpr_32 = V_XOR_B32_e32 [[S_MOV_B32_]], [[COPY2]], implicit $exec
; GFX6: [[V_MAD_F32_:%[0-9]+]]:vgpr_32 = V_MAD_F32 0, [[COPY]], 0, [[COPY1]], 0, [[V_XOR_B32_e32_]], 0, 0, implicit $exec
; GFX6: [[V_MAD_F32_:%[0-9]+]]:vgpr_32 = V_MAD_F32 0, [[COPY]], 0, [[COPY1]], 1, [[COPY2]], 0, 0, implicit $exec
; GFX6: S_ENDPGM 0, implicit [[V_MAD_F32_]]
; GFX10-LABEL: name: fmad_f32_copy_fneg_src2
; GFX10: $vcc_hi = IMPLICIT_DEF
; GFX10: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
; GFX10: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
; GFX10: [[COPY2:%[0-9]+]]:vgpr_32 = COPY $vgpr2
; GFX10: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 2147483648
; GFX10: [[V_XOR_B32_e32_:%[0-9]+]]:vgpr_32 = V_XOR_B32_e32 [[S_MOV_B32_]], [[COPY2]], implicit $exec
; GFX10: [[V_MAD_F32_:%[0-9]+]]:vgpr_32 = V_MAD_F32 0, [[COPY]], 0, [[COPY1]], 0, [[V_XOR_B32_e32_]], 0, 0, implicit $exec
; GFX10: [[V_MAD_F32_:%[0-9]+]]:vgpr_32 = V_MAD_F32 0, [[COPY]], 0, [[COPY1]], 1, [[COPY2]], 0, 0, implicit $exec
; GFX10: S_ENDPGM 0, implicit [[V_MAD_F32_]]
%0:vgpr(s32) = COPY $vgpr0
%1:vgpr(s32) = COPY $vgpr1