derek.holloway
7502bf64a4
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40 lines
1.8 KiB
LLVM
40 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -stop-after=finalize-isel -o - %s | FileCheck %s
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;; Test that reduction of:
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;;
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;; DST = lshr i64 X, Y
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;;
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;; where Y is in the range [63-32] to:
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;;
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;; DST = [srl i32 X, (Y & 0x1F), 0]
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;;
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;; preserves flags
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define i64 @srl_exact(i64 %arg0, i64 %shift_amt) {
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; CHECK-LABEL: name: srl_exact
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; CHECK: bb.0 (%ir-block.0):
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; CHECK-NEXT: liveins: $vgpr1, $vgpr2
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr2
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; CHECK-NEXT: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
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; CHECK-NEXT: [[DEF:%[0-9]+]]:sreg_32 = IMPLICIT_DEF
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; CHECK-NEXT: [[DEF1:%[0-9]+]]:sreg_32 = IMPLICIT_DEF
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; CHECK-NEXT: [[COPY2:%[0-9]+]]:vgpr_32 = COPY [[DEF]]
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; CHECK-NEXT: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE killed [[COPY2]], %subreg.sub0, [[COPY1]], %subreg.sub1
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; CHECK-NEXT: [[COPY3:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE]].sub1
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; CHECK-NEXT: [[DEF2:%[0-9]+]]:sreg_32 = IMPLICIT_DEF
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; CHECK-NEXT: [[DEF3:%[0-9]+]]:sreg_32 = IMPLICIT_DEF
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; CHECK-NEXT: [[COPY4:%[0-9]+]]:vgpr_32 = COPY [[DEF2]]
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; CHECK-NEXT: [[REG_SEQUENCE1:%[0-9]+]]:vreg_64 = REG_SEQUENCE [[COPY]], %subreg.sub0, killed [[COPY4]], %subreg.sub1
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; CHECK-NEXT: [[COPY5:%[0-9]+]]:vgpr_32 = COPY [[REG_SEQUENCE1]].sub0
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; CHECK-NEXT: [[V_LSHRREV_B32_e64_:%[0-9]+]]:vgpr_32 = exact V_LSHRREV_B32_e64 killed [[COPY5]], killed [[COPY3]], implicit $exec
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; CHECK-NEXT: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
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; CHECK-NEXT: $vgpr0 = COPY [[V_LSHRREV_B32_e64_]]
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; CHECK-NEXT: $vgpr1 = COPY [[V_MOV_B32_e32_]]
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; CHECK-NEXT: SI_RETURN implicit $vgpr0, implicit $vgpr1
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%or = or i64 %shift_amt, 32
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%srl = lshr exact i64 %arg0, %or
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ret i64 %srl
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}
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