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2a9ac6c11e
Before the patch it was possible to trigger a constant bus violation when folding immediates into a shrunk instruction. The patch adds a check to enforce the legality of the new operand. Differential Revision: https://reviews.llvm.org/D95527
24 lines
950 B
YAML
24 lines
950 B
YAML
# RUN: llc -march=amdgcn -mcpu=gfx900 -run-pass=si-shrink-instructions --verify-machineinstrs %s -o - | FileCheck %s
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# Make sure immediate folding into V_CNDMASK respects constant bus restrictions.
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---
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name: shrink_cndmask_illegal_imm_folding
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $vgpr0, $vgpr1
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; CHECK-LABEL: name: shrink_cndmask_illegal_imm_folding
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; CHECK: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
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; CHECK: [[MOV:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 32768, implicit $exec
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; CHECK: V_CMP_EQ_U32_e32 0, [[COPY]], implicit-def $vcc, implicit $exec
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; CHECK: V_CNDMASK_B32_e32 [[MOV]], killed [[COPY]], implicit $vcc, implicit $exec
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%0:vgpr_32 = COPY $vgpr0
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%1:vgpr_32 = V_MOV_B32_e32 32768, implicit $exec
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V_CMP_EQ_U32_e32 0, %0:vgpr_32, implicit-def $vcc, implicit $exec
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%2:vgpr_32 = V_CNDMASK_B32_e64 0, %1:vgpr_32, 0, killed %0:vgpr_32, $vcc, implicit $exec
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S_NOP 0
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...
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