derek.holloway
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97 lines
3.0 KiB
Plaintext
97 lines
3.0 KiB
Plaintext
# RUN: %stinkytofu-opt --arch gfx1250 %s --RedundantMovEliminationPass --print-output
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#
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# Redundant MOV Elimination: remove duplicate v_mov_b32 instructions
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# that write the same value to the same destination.
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# Converted from RedundantMovEliminationPassTest.
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#--- Simple duplicate: two identical movs, second is eliminated
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# CHECK-LABEL: @eliminate_simple_duplicate
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# CHECK: v_mov_b32
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# CHECK-SAME: v0
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# CHECK-SAME: v1
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# CHECK: v_add_f32
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# CHECK: v_sub_f32
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# CHECK-NOT: v_mov_b32
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st.func @eliminate_simple_duplicate() {
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^entry:
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v0 = "st.v_mov_b32"(v1) { issueCycles = 1, latencyCycles = 1 }
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v3 = "st.v_add_f32"(v4, v5) { issueCycles = 1, latencyCycles = 5 }
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v0 = "st.v_mov_b32"(v1) { issueCycles = 1, latencyCycles = 1 }
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v7 = "st.v_sub_f32"(v0, v3) { issueCycles = 1, latencyCycles = 5 }
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}
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#--- Multiple duplicates: three identical movs, only first kept
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# CHECK-LABEL: @multiple_duplicates
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# CHECK: v_mov_b32
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# CHECK-SAME: v0
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# CHECK-SAME: v1
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# CHECK: v_add_f32
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# CHECK: v_sub_f32
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# CHECK: v_fma_f32
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# CHECK-NOT: v_mov_b32
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st.func @multiple_duplicates() {
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^entry:
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v0 = "st.v_mov_b32"(v1) { issueCycles = 1, latencyCycles = 1 }
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v3 = "st.v_add_f32"(v4, v5) { issueCycles = 1, latencyCycles = 5 }
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v0 = "st.v_mov_b32"(v1) { issueCycles = 1, latencyCycles = 1 }
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v6 = "st.v_sub_f32"(v7, v8) { issueCycles = 1, latencyCycles = 5 }
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v0 = "st.v_mov_b32"(v1) { issueCycles = 1, latencyCycles = 1 }
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v9 = "st.v_fma_f32"(v0, v3, v6) { issueCycles = 1, latencyCycles = 5 }
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}
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#--- Don't eliminate when source is modified between movs
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# CHECK-LABEL: @dont_eliminate_modified_operand
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# CHECK: v_mov_b32
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# CHECK-SAME: v0
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# CHECK-SAME: v1
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# CHECK: v_add_f32
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# CHECK: v_sub_f32
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# CHECK-SAME: v1
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# CHECK: v_mov_b32
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# CHECK-SAME: v8
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# CHECK-SAME: v1
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st.func @dont_eliminate_modified_operand() {
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^entry:
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v0 = "st.v_mov_b32"(v1) { issueCycles = 1, latencyCycles = 1 }
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v3 = "st.v_add_f32"(v4, v5) { issueCycles = 1, latencyCycles = 5 }
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v1 = "st.v_sub_f32"(v6, v7) { issueCycles = 1, latencyCycles = 5 }
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v8 = "st.v_mov_b32"(v1) { issueCycles = 1, latencyCycles = 1 }
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}
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#--- Different operands: all movs have different src/dst, none eliminated
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# CHECK-LABEL: @different_operands
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# CHECK: v_mov_b32
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# CHECK-SAME: v0
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# CHECK-SAME: v1
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# CHECK: v_mov_b32
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# CHECK-SAME: v3
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# CHECK-SAME: v4
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# CHECK: v_mov_b32
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# CHECK-SAME: v6
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# CHECK-SAME: v5
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st.func @different_operands() {
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^entry:
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v0 = "st.v_mov_b32"(v1) { issueCycles = 1, latencyCycles = 1 }
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v3 = "st.v_mov_b32"(v4) { issueCycles = 1, latencyCycles = 1 }
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v6 = "st.v_mov_b32"(v5) { issueCycles = 1, latencyCycles = 1 }
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}
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#--- No duplicates: all movs to different destinations with different sources
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# CHECK-LABEL: @no_duplicates
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# CHECK: v_mov_b32
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# CHECK: v_mov_b32
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# CHECK: v_mov_b32
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# CHECK: v_mov_b32
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st.func @no_duplicates() {
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^entry:
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v0 = "st.v_mov_b32"(v1) { issueCycles = 1, latencyCycles = 1 }
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v3 = "st.v_mov_b32"(v4) { issueCycles = 1, latencyCycles = 1 }
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v6 = "st.v_mov_b32"(v7) { issueCycles = 1, latencyCycles = 1 }
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v9 = "st.v_mov_b32"(v10) { issueCycles = 1, latencyCycles = 1 }
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}
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