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d40c701079
Generate a single early exit block out-of-line and branch to this if all lanes are killed. This avoids branching if lanes are active. Reviewed By: nhaehnle Differential Revision: https://reviews.llvm.org/D82641
41 lines
895 B
YAML
41 lines
895 B
YAML
# RUN: llc -march=amdgcn -mcpu=polaris10 -run-pass si-insert-skips -amdgpu-skip-threshold-legacy=1 %s -o - | FileCheck %s
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# https://bugs.freedesktop.org/show_bug.cgi?id=99019
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--- |
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define amdgpu_ps void @kill_uncond_branch() {
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ret void
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}
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...
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---
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# CHECK-LABEL: name: kill_uncond_branch
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# CHECK: bb.0:
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# CHECK: S_CBRANCH_VCCNZ %bb.1, implicit $vcc
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# CHECK: bb.1:
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# CHECK: V_CMPX_LE_F32_e32
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# CHECK-NEXT: S_CBRANCH_EXECZ %bb.3, implicit $exec
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# CHECK: bb.2:
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# CHECK: S_ENDPGM 0
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# CHECK: bb.3:
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# CHECK-NEXT: EXP_DONE
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# CHECK: S_ENDPGM 0
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name: kill_uncond_branch
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body: |
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bb.0:
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successors: %bb.1
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S_CBRANCH_VCCNZ %bb.1, implicit $vcc
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bb.1:
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successors: %bb.2
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$vgpr0 = V_MOV_B32_e32 0, implicit $exec
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SI_KILL_F32_COND_IMM_TERMINATOR $vgpr0, 0, 3, implicit-def $exec, implicit-def $vcc, implicit-def $scc, implicit $exec
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S_BRANCH %bb.2
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bb.2:
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S_ENDPGM 0
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