derek.holloway
7502bf64a4
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133 lines
2.8 KiB
YAML
133 lines
2.8 KiB
YAML
# REQUIRES: asserts
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# RUN: llc -mtriple=riscv64-linux-gnu -x=mir < %s \
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# RUN: -debug-only=machine-scheduler -start-before=machine-scheduler 2>&1 \
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# RUN: -mattr=+fusion-shift-bit-extract | FileCheck %s
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# Test shift-bit-extract fusion: SLLI + SRLI/SRAI
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# This fusion combines left shift followed by right shift with the constraint
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# that the first immediate must be less than or equal to the second immediate.
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# It also checks that both instructions have the same width (W suffix or not).
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# CHECK: slli_srli
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# CHECK: Macro fuse: {{.*}}SLLI - SRLI
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---
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name: slli_srli
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $x10
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%1:gpr = COPY $x10
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%2:gpr = SLLI %1, 8
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%3:gpr = XORI %1, 3
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%4:gpr = SRLI %2, 16
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$x10 = COPY %3
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$x11 = COPY %4
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PseudoRET
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...
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# CHECK: slli_srai
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# CHECK: Macro fuse: {{.*}}SLLI - SRAI
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---
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name: slli_srai
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $x10
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%1:gpr = COPY $x10
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%2:gpr = SLLI %1, 4
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%3:gpr = XORI %1, 3
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%4:gpr = SRAI %2, 8
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$x10 = COPY %3
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$x11 = COPY %4
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PseudoRET
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...
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# Test with equal immediates
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# CHECK: slli_srai_equal
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# CHECK: Macro fuse: {{.*}}SLLI - SRAI
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---
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name: slli_srai_equal
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $x10
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%1:gpr = COPY $x10
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%2:gpr = SLLI %1, 12
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%3:gpr = XORI %1, 3
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%4:gpr = SRAI %2, 12
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$x10 = COPY %3
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$x11 = COPY %4
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PseudoRET
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...
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# Test W-suffix variants (32-bit operations on RV64)
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# CHECK: slliw_srliw
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# CHECK: Macro fuse: {{.*}}SLLIW - SRLIW
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---
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name: slliw_srliw
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $x10
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%1:gpr = COPY $x10
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%2:gpr = SLLIW %1, 8
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%3:gpr = XORI %1, 3
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%4:gpr = SRLIW %2, 16
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$x10 = COPY %3
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$x11 = COPY %4
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PseudoRET
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...
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# CHECK: slliw_sraiw
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# CHECK: Macro fuse: {{.*}}SLLIW - SRAIW
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---
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name: slliw_sraiw
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $x10
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%1:gpr = COPY $x10
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%2:gpr = SLLIW %1, 4
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%3:gpr = XORI %1, 3
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%4:gpr = SRAIW %2, 8
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$x10 = COPY %3
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$x11 = COPY %4
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PseudoRET
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...
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# Test that fusion does not happen with different widths
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# CHECK: slli_srliw_no_fusion
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# CHECK-NOT: Macro fuse: {{.*}}SLLI - SRLIW
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---
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name: slli_srliw_no_fusion
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $x10
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%1:gpr = COPY $x10
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%2:gpr = SLLI %1, 8
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%3:gpr = XORI %1, 3
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%4:gpr = SRLIW %2, 16
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$x10 = COPY %3
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$x11 = COPY %4
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PseudoRET
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...
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# Test that fusion does not happen when imm1 > imm2
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# CHECK: slli_srli_no_fusion
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# CHECK-NOT: Macro fuse: {{.*}}SLLI - SRLI
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---
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name: slli_srli_no_fusion
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $x10
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%1:gpr = COPY $x10
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%2:gpr = SLLI %1, 16
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%3:gpr = XORI %1, 3
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%4:gpr = SRLI %2, 8
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$x10 = COPY %3
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$x11 = COPY %4
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PseudoRET
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...
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