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llvm-project/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.ps.live.ll

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[llvm] Remove redundant check-prefix=CHECK from tests. NFC. Reviewers: t.p.northover, oren_ben_simhon, niravd, mcrosier Reviewed By: oren_ben_simhon, mcrosier Subscribers: nhaehnle, javed.absar, llvm-commits Differential Revision: https://reviews.llvm.org/D35466 llvm-svn: 308193
2017-07-18 01:32:45 +08:00
; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck %s
AMDGPU/SI: add llvm.amdgcn.ps.live intrinsic Summary: This intrinsic returns true if the current thread belongs to a live pixel and false if it belongs to a pixel that we are executing only for derivative computation. It will be used by Mesa to implement gl_HelperInvocation. Note that for pixels that are killed during the shader, this implementation also returns true, but it doesn't matter because those pixels are always disabled in the EXEC mask. This unearthed a corner case in the instruction verifier, which complained about a v_cndmask 0, 1, exec, exec<imp-use> instruction. That's stupid but correct code, so make the verifier accept it as such. Reviewers: arsenm, tstellarAMD Subscribers: arsenm, llvm-commits Differential Revision: http://reviews.llvm.org/D19191 llvm-svn: 267102
2016-04-22 12:04:08 +08:00
; CHECK-LABEL: {{^}}test1:
; CHECK: v_cndmask_b32_e64 v0, 0, 1, exec
;
; Note: We could generate better code here if we recognized earlier that
; there is no WQM use and therefore llvm.amdgcn.ps.live is constant. However,
; the expectation is that the intrinsic will be used in non-trivial shaders,
; so such an optimization doesn't seem worth the effort.
AMDGPU: Convert image intrinsic uses in tests llvm-svn: 298386
2017-03-22 00:24:12 +08:00
define amdgpu_ps float @test1() #0 {
AMDGPU/SI: add llvm.amdgcn.ps.live intrinsic Summary: This intrinsic returns true if the current thread belongs to a live pixel and false if it belongs to a pixel that we are executing only for derivative computation. It will be used by Mesa to implement gl_HelperInvocation. Note that for pixels that are killed during the shader, this implementation also returns true, but it doesn't matter because those pixels are always disabled in the EXEC mask. This unearthed a corner case in the instruction verifier, which complained about a v_cndmask 0, 1, exec, exec<imp-use> instruction. That's stupid but correct code, so make the verifier accept it as such. Reviewers: arsenm, tstellarAMD Subscribers: arsenm, llvm-commits Differential Revision: http://reviews.llvm.org/D19191 llvm-svn: 267102
2016-04-22 12:04:08 +08:00
%live = call i1 @llvm.amdgcn.ps.live()
%live.32 = zext i1 %live to i32
%r = bitcast i32 %live.32 to float
ret float %r
}
; CHECK-LABEL: {{^}}test2:
; CHECK: s_mov_b64 [[LIVE:s\[[0-9]+:[0-9]+\]]], exec
; CHECK-DAG: s_wqm_b64 exec, exec
; CHECK-DAG: v_cndmask_b32_e64 [[VAR:v[0-9]+]], 0, 1, [[LIVE]]
; CHECK: image_sample v0, [[VAR]],
AMDGPU: Convert image intrinsic uses in tests llvm-svn: 298386
2017-03-22 00:24:12 +08:00
define amdgpu_ps float @test2() #0 {
AMDGPU/SI: add llvm.amdgcn.ps.live intrinsic Summary: This intrinsic returns true if the current thread belongs to a live pixel and false if it belongs to a pixel that we are executing only for derivative computation. It will be used by Mesa to implement gl_HelperInvocation. Note that for pixels that are killed during the shader, this implementation also returns true, but it doesn't matter because those pixels are always disabled in the EXEC mask. This unearthed a corner case in the instruction verifier, which complained about a v_cndmask 0, 1, exec, exec<imp-use> instruction. That's stupid but correct code, so make the verifier accept it as such. Reviewers: arsenm, tstellarAMD Subscribers: arsenm, llvm-commits Differential Revision: http://reviews.llvm.org/D19191 llvm-svn: 267102
2016-04-22 12:04:08 +08:00
%live = call i1 @llvm.amdgcn.ps.live()
%live.32 = zext i1 %live to i32
AMDGPU: Convert image intrinsic uses in tests llvm-svn: 298386
2017-03-22 00:24:12 +08:00
%live.32.bc = bitcast i32 %live.32 to float
%t = call <4 x float> @llvm.amdgcn.image.sample.v4f32.f32.v8i32(float %live.32.bc, <8 x i32> undef, <4 x i32> undef, i32 15, i1 false, i1 false, i1 false, i1 false, i1 false)
AMDGPU/SI: add llvm.amdgcn.ps.live intrinsic Summary: This intrinsic returns true if the current thread belongs to a live pixel and false if it belongs to a pixel that we are executing only for derivative computation. It will be used by Mesa to implement gl_HelperInvocation. Note that for pixels that are killed during the shader, this implementation also returns true, but it doesn't matter because those pixels are always disabled in the EXEC mask. This unearthed a corner case in the instruction verifier, which complained about a v_cndmask 0, 1, exec, exec<imp-use> instruction. That's stupid but correct code, so make the verifier accept it as such. Reviewers: arsenm, tstellarAMD Subscribers: arsenm, llvm-commits Differential Revision: http://reviews.llvm.org/D19191 llvm-svn: 267102
2016-04-22 12:04:08 +08:00
%r = extractelement <4 x float> %t, i32 0
ret float %r
}
; CHECK-LABEL: {{^}}test3:
; CHECK: s_mov_b64 [[LIVE:s\[[0-9]+:[0-9]+\]]], exec
; CHECK-DAG: s_wqm_b64 exec, exec
; CHECK-DAG: s_xor_b64 [[HELPER:s\[[0-9]+:[0-9]+\]]], [[LIVE]], -1
; CHECK_DAG: s_and_saveexec_b64 [[SAVED:s\[[0-9]+:[0-9]+\]]], [[HELPER]]
; CHECK: ; %dead
AMDGPU: Convert image intrinsic uses in tests llvm-svn: 298386
2017-03-22 00:24:12 +08:00
define amdgpu_ps float @test3(i32 %in) #0 {
AMDGPU/SI: add llvm.amdgcn.ps.live intrinsic Summary: This intrinsic returns true if the current thread belongs to a live pixel and false if it belongs to a pixel that we are executing only for derivative computation. It will be used by Mesa to implement gl_HelperInvocation. Note that for pixels that are killed during the shader, this implementation also returns true, but it doesn't matter because those pixels are always disabled in the EXEC mask. This unearthed a corner case in the instruction verifier, which complained about a v_cndmask 0, 1, exec, exec<imp-use> instruction. That's stupid but correct code, so make the verifier accept it as such. Reviewers: arsenm, tstellarAMD Subscribers: arsenm, llvm-commits Differential Revision: http://reviews.llvm.org/D19191 llvm-svn: 267102
2016-04-22 12:04:08 +08:00
entry:
%live = call i1 @llvm.amdgcn.ps.live()
br i1 %live, label %end, label %dead
dead:
%tc.dead = mul i32 %in, 2
br label %end
end:
%tc = phi i32 [ %in, %entry ], [ %tc.dead, %dead ]
AMDGPU: Convert image intrinsic uses in tests llvm-svn: 298386
2017-03-22 00:24:12 +08:00
%tc.bc = bitcast i32 %tc to float
%t = call <4 x float> @llvm.amdgcn.image.sample.v4f32.f32.v8i32(float %tc.bc, <8 x i32> undef, <4 x i32> undef, i32 15, i1 false, i1 false, i1 false, i1 false, i1 false) #0
AMDGPU/SI: add llvm.amdgcn.ps.live intrinsic Summary: This intrinsic returns true if the current thread belongs to a live pixel and false if it belongs to a pixel that we are executing only for derivative computation. It will be used by Mesa to implement gl_HelperInvocation. Note that for pixels that are killed during the shader, this implementation also returns true, but it doesn't matter because those pixels are always disabled in the EXEC mask. This unearthed a corner case in the instruction verifier, which complained about a v_cndmask 0, 1, exec, exec<imp-use> instruction. That's stupid but correct code, so make the verifier accept it as such. Reviewers: arsenm, tstellarAMD Subscribers: arsenm, llvm-commits Differential Revision: http://reviews.llvm.org/D19191 llvm-svn: 267102
2016-04-22 12:04:08 +08:00
%r = extractelement <4 x float> %t, i32 0
ret float %r
}
AMDGPU: Convert image intrinsic uses in tests llvm-svn: 298386
2017-03-22 00:24:12 +08:00
declare i1 @llvm.amdgcn.ps.live() #1
declare <4 x float> @llvm.amdgcn.image.sample.v4f32.f32.v8i32(float, <8 x i32>, <4 x i32>, i32, i1, i1, i1, i1, i1) #2
AMDGPU/SI: add llvm.amdgcn.ps.live intrinsic Summary: This intrinsic returns true if the current thread belongs to a live pixel and false if it belongs to a pixel that we are executing only for derivative computation. It will be used by Mesa to implement gl_HelperInvocation. Note that for pixels that are killed during the shader, this implementation also returns true, but it doesn't matter because those pixels are always disabled in the EXEC mask. This unearthed a corner case in the instruction verifier, which complained about a v_cndmask 0, 1, exec, exec<imp-use> instruction. That's stupid but correct code, so make the verifier accept it as such. Reviewers: arsenm, tstellarAMD Subscribers: arsenm, llvm-commits Differential Revision: http://reviews.llvm.org/D19191 llvm-svn: 267102
2016-04-22 12:04:08 +08:00
AMDGPU: Convert image intrinsic uses in tests llvm-svn: 298386
2017-03-22 00:24:12 +08:00
attributes #0 = { nounwind }
attributes #1 = { nounwind readnone }
attributes #2 = { nounwind readonly }