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R600/SI: Allow SI_KILL for geometry shaders 

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
llvm-svn: 202336
This commit is contained in:
Michel Danzer 2014-02-27 01:47:02 +00:00
parent 294c08265d
commit 6f273c57db
2 changed files with 25 additions and 3 deletions
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10
llvm/lib/Target/R600/SILowerControlFlow.cpp
View File

@ -145,7 +145,9 @@ void SILowerControlFlowPass::SkipIfDead(MachineInstr &MI) {
MachineBasicBlock &MBB = *MI.getParent();
DebugLoc DL = MI.getDebugLoc();
if (!shouldSkip(&MBB, &MBB.getParent()->back()))
if (MBB.getParent()->getInfo<SIMachineFunctionInfo>()->ShaderType !=
ShaderType::PIXEL ||
!shouldSkip(&MBB, &MBB.getParent()->back()))
return;
MachineBasicBlock::iterator Insert = &MI;
@ -293,9 +295,11 @@ void SILowerControlFlowPass::Kill(MachineInstr &MI) {
MachineBasicBlock &MBB = *MI.getParent();
DebugLoc DL = MI.getDebugLoc();
// Kill is only allowed in pixel shaders
// Kill is only allowed in pixel / geometry shaders
assert(MBB.getParent()->getInfo<SIMachineFunctionInfo>()->ShaderType ==
ShaderType::PIXEL);
ShaderType::PIXEL ||
MBB.getParent()->getInfo<SIMachineFunctionInfo>()->ShaderType ==
ShaderType::GEOMETRY);
// Clear this pixel from the exec mask if the operand is negative
BuildMI(MBB, &MI, DL, TII->get(AMDGPU::V_CMPX_LE_F32_e32), AMDGPU::VCC)

18
llvm/test/CodeGen/R600/llvm.AMDGPU.kill.ll Normal file
View File

@ -0,0 +1,18 @@
; RUN: llc < %s -march=r600 -mcpu=verde -verify-machineinstrs | FileCheck --check-prefix=SI %s
; SI-LABEL: @kill_gs
; SI: V_CMPX_LE_F32
define void @kill_gs() #0 {
main_body:
%0 = icmp ule i32 0, 3
%1 = select i1 %0, float 1.000000e+00, float -1.000000e+00
call void @llvm.AMDGPU.kill(float %1)
ret void
}
declare void @llvm.AMDGPU.kill(float)
attributes #0 = { "ShaderType"="2" }
!0 = metadata !{metadata !"const", null, i32 1}