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[AMDGPU][SIInsertWaitcnts] Add test functions in waitcnt-wcg-attributes.mir #186504

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Merged
vporpo merged 1 commit into from
Mar 20, 2026
+44 −3
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[AMDGPU][SIInsertWaitcnts] Add test functions in waitcnt-wcg-attributes.mir #186504

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47 changes: 44 additions & 3 deletions llvm/test/CodeGen/AMDGPU/waitcnt-wcg-attributes.mir
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Original file line number Diff line number Diff line change
Expand Up @@ -2,15 +2,24 @@
# RUN: llc -mtriple=amdgcn -mcpu=gfx1200 -verify-machineinstrs -run-pass si-insert-waitcnts -o - %s | FileCheck %s

# Checks that the WaitcntGenerator updates its behavior when we switch MFs
# with different attributes. The two functions have identical bodies but one
# has theh expert-scheduling attribute off and the other on, so we expect
# different code generated by SIInsertWaitcnts.
# with different attributes.
# There are 2 pairs of functions, each testing an attribute:
# The first pair is testing amdgpu-expert-scheduling-mode
# and the second is testing target-cpu
#
# In each function pair the function bodies are identical and the only
# difference is the attribute.


--- |
define amdgpu_kernel void @test-wcg-attributes-noexpert() #0 { ret void }
define amdgpu_kernel void @test-wcg-attributes-expert() #1 { ret void }
define amdgpu_kernel void @test-wcg-attributes-gfx900() #2 { ret void }
define amdgpu_kernel void @test-wcg-attributes-gfx1200() #3 { ret void }
attributes #0 = { "amdgpu-expert-scheduling-mode"="false" }
attributes #1 = { "amdgpu-expert-scheduling-mode"="true" }
attributes #2 = { "target-cpu"="gfx900" }
attributes #3 = { "target-cpu"="gfx1200" }
...

---
Expand Down Expand Up @@ -51,3 +60,35 @@ body: |
S_ENDPGM 0
...

---
name: test-wcg-attributes-gfx900
body: |
bb.0:
; CHECK-LABEL: name: test-wcg-attributes-gfx900
; CHECK: S_WAITCNT 0
; CHECK-NEXT: $vgpr1 = nofpexcept V_EXP_F32_e32 $vgpr0, implicit $mode, implicit $exec
; CHECK-NEXT: $vgpr0_vgpr1_vgpr2_vgpr3 = DS_READ_B128_gfx9 renamable $vgpr36, 8224, 0, implicit $exec
; CHECK-NEXT: S_ENDPGM 0
$vgpr1 = nofpexcept V_EXP_F32_e32 $vgpr0, implicit $mode, implicit $exec
$vgpr0_vgpr1_vgpr2_vgpr3 = DS_READ_B128_gfx9 renamable $vgpr36, 8224, 0, implicit $exec
S_ENDPGM 0
...

---
name: test-wcg-attributes-gfx1200
body: |
bb.0:
; CHECK-LABEL: name: test-wcg-attributes-gfx1200
; CHECK: S_WAIT_LOADCNT_DSCNT 0
; CHECK-NEXT: S_WAIT_EXPCNT 0
; CHECK-NEXT: S_WAIT_SAMPLECNT 0
; CHECK-NEXT: S_WAIT_BVHCNT 0
; CHECK-NEXT: S_WAIT_KMCNT 0
; CHECK-NEXT: $vgpr1 = nofpexcept V_EXP_F32_e32 $vgpr0, implicit $mode, implicit $exec
; CHECK-NEXT: $vgpr0_vgpr1_vgpr2_vgpr3 = DS_READ_B128_gfx9 renamable $vgpr36, 8224, 0, implicit $exec
; CHECK-NEXT: S_ENDPGM 0
$vgpr1 = nofpexcept V_EXP_F32_e32 $vgpr0, implicit $mode, implicit $exec
$vgpr0_vgpr1_vgpr2_vgpr3 = DS_READ_B128_gfx9 renamable $vgpr36, 8224, 0, implicit $exec
S_ENDPGM 0
...