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clang-p2996/llvm/test/CodeGen/AMDGPU/strict_fma.f32.ll
Jay Foad f2c164c815 [AMDGPU] Do not wait for vscnt on function entry and return 
SIInsertWaitcnts inserts waitcnt instructions to resolve data
dependencies. The GFX10+ vscnt (VMEM store count) counter is never used
in this way. It is only used to resolve memory dependencies, and that is
handled by SIMemoryLegalizer. Hence there is no need to conservatively
wait for vscnt to be 0 on function entry and before returns.

Differential Revision: https://reviews.llvm.org/D153537
2023-07-04 12:22:38 +01:00

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx900 < %s | FileCheck -check-prefix=GCN %s
; RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx1010 < %s | FileCheck -check-prefix=GFX10 %s
; RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx1100 -amdgpu-enable-delay-alu=0 < %s | FileCheck -check-prefix=GFX10 %s
define float @v_constained_fma_f32_fpexcept_strict(float %x, float %y, float %z) #0 {
; GCN-LABEL: v_constained_fma_f32_fpexcept_strict:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_fma_f32 v0, v0, v1, v2
; GCN-NEXT: s_setpc_b64 s[30:31]
;
; GFX10-LABEL: v_constained_fma_f32_fpexcept_strict:
; GFX10: ; %bb.0:
; GFX10-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX10-NEXT: v_fma_f32 v0, v0, v1, v2
; GFX10-NEXT: s_setpc_b64 s[30:31]
%val = call float @llvm.experimental.constrained.fma.f32(float %x, float %y, float %z, metadata !"round.tonearest", metadata !"fpexcept.strict")
ret float %val
}
define <2 x float> @v_constained_fma_v2f32_fpexcept_strict(<2 x float> %x, <2 x float> %y, <2 x float> %z) #0 {
; GCN-LABEL: v_constained_fma_v2f32_fpexcept_strict:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_fma_f32 v0, v0, v2, v4
; GCN-NEXT: v_fma_f32 v1, v1, v3, v5
; GCN-NEXT: s_setpc_b64 s[30:31]
;
; GFX10-LABEL: v_constained_fma_v2f32_fpexcept_strict:
; GFX10: ; %bb.0:
; GFX10-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX10-NEXT: v_fma_f32 v0, v0, v2, v4
; GFX10-NEXT: v_fma_f32 v1, v1, v3, v5
; GFX10-NEXT: s_setpc_b64 s[30:31]
%val = call <2 x float> @llvm.experimental.constrained.fma.v2f32(<2 x float> %x, <2 x float> %y, <2 x float> %z, metadata !"round.tonearest", metadata !"fpexcept.strict")
ret <2 x float> %val
}
define <3 x float> @v_constained_fma_v3f32_fpexcept_strict(<3 x float> %x, <3 x float> %y, <3 x float> %z) #0 {
; GCN-LABEL: v_constained_fma_v3f32_fpexcept_strict:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_fma_f32 v0, v0, v3, v6
; GCN-NEXT: v_fma_f32 v1, v1, v4, v7
; GCN-NEXT: v_fma_f32 v2, v2, v5, v8
; GCN-NEXT: s_setpc_b64 s[30:31]
;
; GFX10-LABEL: v_constained_fma_v3f32_fpexcept_strict:
; GFX10: ; %bb.0:
; GFX10-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX10-NEXT: v_fma_f32 v0, v0, v3, v6
; GFX10-NEXT: v_fma_f32 v1, v1, v4, v7
; GFX10-NEXT: v_fma_f32 v2, v2, v5, v8
; GFX10-NEXT: s_setpc_b64 s[30:31]
%val = call <3 x float> @llvm.experimental.constrained.fma.v3f32(<3 x float> %x, <3 x float> %y, <3 x float> %z, metadata !"round.tonearest", metadata !"fpexcept.strict")
ret <3 x float> %val
}
define <4 x float> @v_constained_fma_v4f32_fpexcept_strict(<4 x float> %x, <4 x float> %y, <4 x float> %z) #0 {
; GCN-LABEL: v_constained_fma_v4f32_fpexcept_strict:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_fma_f32 v0, v0, v4, v8
; GCN-NEXT: v_fma_f32 v1, v1, v5, v9
; GCN-NEXT: v_fma_f32 v2, v2, v6, v10
; GCN-NEXT: v_fma_f32 v3, v3, v7, v11
; GCN-NEXT: s_setpc_b64 s[30:31]
;
; GFX10-LABEL: v_constained_fma_v4f32_fpexcept_strict:
; GFX10: ; %bb.0:
; GFX10-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX10-NEXT: v_fma_f32 v0, v0, v4, v8
; GFX10-NEXT: v_fma_f32 v1, v1, v5, v9
; GFX10-NEXT: v_fma_f32 v2, v2, v6, v10
; GFX10-NEXT: v_fma_f32 v3, v3, v7, v11
; GFX10-NEXT: s_setpc_b64 s[30:31]
%val = call <4 x float> @llvm.experimental.constrained.fma.v4f32(<4 x float> %x, <4 x float> %y, <4 x float> %z, metadata !"round.tonearest", metadata !"fpexcept.strict")
ret <4 x float> %val
}
define float @v_constained_fma_f32_fpexcept_strict_fneg(float %x, float %y, float %z) #0 {
; GCN-LABEL: v_constained_fma_f32_fpexcept_strict_fneg:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_fma_f32 v0, v0, v1, -v2
; GCN-NEXT: s_setpc_b64 s[30:31]
;
; GFX10-LABEL: v_constained_fma_f32_fpexcept_strict_fneg:
; GFX10: ; %bb.0:
; GFX10-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX10-NEXT: v_fma_f32 v0, v0, v1, -v2
; GFX10-NEXT: s_setpc_b64 s[30:31]
%neg.z = fneg float %z
%val = call float @llvm.experimental.constrained.fma.f32(float %x, float %y, float %neg.z, metadata !"round.tonearest", metadata !"fpexcept.strict")
ret float %val
}
define float @v_constained_fma_f32_fpexcept_strict_fneg_fneg(float %x, float %y, float %z) #0 {
; GCN-LABEL: v_constained_fma_f32_fpexcept_strict_fneg_fneg:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_fma_f32 v0, -v0, -v1, v2
; GCN-NEXT: s_setpc_b64 s[30:31]
;
; GFX10-LABEL: v_constained_fma_f32_fpexcept_strict_fneg_fneg:
; GFX10: ; %bb.0:
; GFX10-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX10-NEXT: v_fma_f32 v0, -v0, -v1, v2
; GFX10-NEXT: s_setpc_b64 s[30:31]
%neg.x = fneg float %x
%neg.y = fneg float %y
%val = call float @llvm.experimental.constrained.fma.f32(float %neg.x, float %neg.y, float %z, metadata !"round.tonearest", metadata !"fpexcept.strict")
ret float %val
}
define float @v_constained_fma_f32_fpexcept_strict_fabs_fabs(float %x, float %y, float %z) #0 {
; GCN-LABEL: v_constained_fma_f32_fpexcept_strict_fabs_fabs:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_fma_f32 v0, |v0|, |v1|, v2
; GCN-NEXT: s_setpc_b64 s[30:31]
;
; GFX10-LABEL: v_constained_fma_f32_fpexcept_strict_fabs_fabs:
; GFX10: ; %bb.0:
; GFX10-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX10-NEXT: v_fma_f32 v0, |v0|, |v1|, v2
; GFX10-NEXT: s_setpc_b64 s[30:31]
%neg.x = call float @llvm.fabs.f32(float %x)
%neg.y = call float @llvm.fabs.f32(float %y)
%val = call float @llvm.experimental.constrained.fma.f32(float %neg.x, float %neg.y, float %z, metadata !"round.tonearest", metadata !"fpexcept.strict")
ret float %val
}
define <2 x float> @v_constained_fma_v2f32_fpexcept_strict_fneg_fneg(<2 x float> %x, <2 x float> %y, <2 x float> %z) #0 {
; GCN-LABEL: v_constained_fma_v2f32_fpexcept_strict_fneg_fneg:
; GCN: ; %bb.0:
; GCN-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GCN-NEXT: v_fma_f32 v0, -v0, -v2, v4
; GCN-NEXT: v_fma_f32 v1, -v1, -v3, v5
; GCN-NEXT: s_setpc_b64 s[30:31]
;
; GFX10-LABEL: v_constained_fma_v2f32_fpexcept_strict_fneg_fneg:
; GFX10: ; %bb.0:
; GFX10-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX10-NEXT: v_fma_f32 v0, -v0, -v2, v4
; GFX10-NEXT: v_fma_f32 v1, -v1, -v3, v5
; GFX10-NEXT: s_setpc_b64 s[30:31]
%neg.x = fneg <2 x float> %x
%neg.y = fneg <2 x float> %y
%val = call <2 x float> @llvm.experimental.constrained.fma.v2f32(<2 x float> %neg.x, <2 x float> %neg.y, <2 x float> %z, metadata !"round.tonearest", metadata !"fpexcept.strict")
ret <2 x float> %val
}
declare float @llvm.fabs.f32(float) #1
declare float @llvm.experimental.constrained.fma.f32(float, float, float, metadata, metadata) #1
declare <2 x float> @llvm.experimental.constrained.fma.v2f32(<2 x float>, <2 x float>, <2 x float>, metadata, metadata) #1
declare <3 x float> @llvm.experimental.constrained.fma.v3f32(<3 x float>, <3 x float>, <3 x float>, metadata, metadata) #1
declare <4 x float> @llvm.experimental.constrained.fma.v4f32(<4 x float>, <4 x float>, <4 x float>, metadata, metadata) #1
attributes #0 = { strictfp }
attributes #1 = { inaccessiblememonly nounwind willreturn }
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