611 lines
12 KiB
YAML
611 lines
12 KiB
YAML
# RUN: llc -mtriple=aarch64--linux-gnu -run-pass=aarch64-copyelim %s -verify-machineinstrs -o - | FileCheck %s
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---
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# Check that bb.0 COPY is seen through to allow the bb.1 COPY of XZR to be removed.
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# CHECK-LABEL: name: test1
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# CHECK-NOT: COPY $xzr
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name: test1
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $x0, $x1
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$x0 = COPY $x1
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CBNZX $x1, %bb.2
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bb.1:
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$x0 = COPY $xzr
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B %bb.3
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bb.2:
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liveins: $x1
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$x0 = LDRXui $x1, 0
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bb.3:
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liveins: $x0
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RET_ReallyLR implicit $x0
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...
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# Similar to test1, but with reversed COPY.
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# CHECK-LABEL: name: test2
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# CHECK-NOT: COPY $xzr
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name: test2
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $x0, $x1
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$x1 = COPY $x0
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CBNZX $x1, %bb.2
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bb.1:
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$x0 = COPY $xzr
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B %bb.3
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bb.2:
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liveins: $x1
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$x0 = LDRXui $x1, 0
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bb.3:
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liveins: $x0
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RET_ReallyLR implicit $x0
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...
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# Similar to test1, but with a clobber that prevents removal of the XZR COPY.
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# CHECK-LABEL: name: test3
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# CHECK: COPY $xzr
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name: test3
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $x0, $x1, $x2
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$x0 = COPY $x1
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$x1 = LDRXui $x1, 0
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CBNZX $x1, %bb.2
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bb.1:
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$x0 = COPY $xzr
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B %bb.3
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bb.2:
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liveins: $x1
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$x0 = LDRXui $x1, 0
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bb.3:
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liveins: $x0
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RET_ReallyLR implicit $x0
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...
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# Similar to test2, but with a clobber that prevents removal of the XZR COPY.
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# CHECK-LABEL: name: test4
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# CHECK: COPY $xzr
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name: test4
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $x0, $x1, $x2
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$x1 = COPY $x0
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$x1 = LDRXui $x1, 0
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CBNZX $x1, %bb.2
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bb.1:
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$x0 = COPY $xzr
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B %bb.3
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bb.2:
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liveins: $x1
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$x0 = LDRXui $x1, 0
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bb.3:
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liveins: $x0
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RET_ReallyLR implicit $x0
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...
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# Similar to test2, but with a clobber that prevents removal of the XZR COPY.
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# CHECK-LABEL: name: test5
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# CHECK: COPY $xzr
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name: test5
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $x0, $x1, $x2
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$x1 = COPY $x0
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$x0 = LDRXui $x1, 0
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CBNZX $x1, %bb.2
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bb.1:
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$x0 = COPY $xzr
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B %bb.3
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bb.2:
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liveins: $x1
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$x0 = LDRXui $x1, 0
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bb.3:
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liveins: $x0
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RET_ReallyLR implicit $x0
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...
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# Similar to test1, but with two levels of COPYs.
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# CHECK-LABEL: name: test6
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# CHECK-NOT: COPY $xzr
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name: test6
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $x0, $x1, $x2
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$x2 = COPY $x0
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$x1 = COPY $x2
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CBNZX $x1, %bb.2
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bb.1:
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$x0 = COPY $xzr
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B %bb.3
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bb.2:
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liveins: $x1
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$x0 = LDRXui $x1, 0
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bb.3:
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liveins: $x0
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RET_ReallyLR implicit $x0
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...
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# Similar to test1, but with two levels of COPYs and a clobber preventing COPY of XZR removal.
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# CHECK-LABEL: name: test7
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# CHECK: COPY $xzr
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name: test7
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $x0, $x1, $x2
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$x2 = COPY $x0
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$x0 = LDRXui $x1, 0
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$x1 = COPY $x2
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CBNZX $x1, %bb.2
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bb.1:
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$x0 = COPY $xzr
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B %bb.3
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bb.2:
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liveins: $x1
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$x0 = LDRXui $x1, 0
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bb.3:
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liveins: $x0
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RET_ReallyLR implicit $x0
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...
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# Check that the TargetRegs vector clobber update loop in
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# AArch64RedundantCopyElimination::optimizeCopy works correctly.
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# CHECK-LABEL: name: test8
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# CHECK: x0 = COPY $xzr
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# CHECK: x1 = COPY $xzr
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name: test8
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $x0, $x1, $x2
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$x1 = COPY $x0
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CBNZX $x1, %bb.2
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bb.1:
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liveins: $x0, $x2
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$x0, $x1 = LDPXi $x2, 0
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$x0 = COPY $xzr
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$x1 = COPY $xzr
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B %bb.3
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bb.2:
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liveins: $x1
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$x0 = LDRXui $x1, 0
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bb.3:
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liveins: $x0
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RET_ReallyLR implicit $x0
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...
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# Check that copy isn't removed from a block with multiple predecessors.
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# CHECK-LABEL: name: test9
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# CHECK: x0 = COPY $xzr
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# CHECK-NEXT: B %bb.3
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name: test9
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $x0, $x1
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CBNZX $x0, %bb.2
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bb.1:
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liveins: $x0
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$x0 = COPY $xzr
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B %bb.3
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bb.2:
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liveins: $x1
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$x0 = LDRXui $x1, 0
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CBNZX $x1, %bb.1
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bb.3:
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liveins: $x0
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RET_ReallyLR implicit $x0
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...
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# Eliminate redundant MOVi32imm 7 in bb.1
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# Note: 32-bit compare/32-bit move imm
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# Kill marker should be removed from compare.
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# CHECK-LABEL: name: test10
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# CHECK: SUBSWri $w0, 7, 0, implicit-def $nzcv
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# CHECK: bb.1:
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# CHECK-NOT: MOVi32imm
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name: test10
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $w0, $x1
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dead $wzr = SUBSWri killed $w0, 7, 0, implicit-def $nzcv
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Bcc 1, %bb.2, implicit killed $nzcv
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B %bb.1
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bb.1:
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liveins: $x1
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$w0 = MOVi32imm 7
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STRWui killed $w0, killed $x1, 0
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bb.2:
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RET_ReallyLR
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...
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# Eliminate redundant MOVi32imm 7 in bb.1
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# Note: 64-bit compare/32-bit move imm w/implicit def
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# Kill marker should be removed from compare.
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# CHECK-LABEL: name: test11
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# CHECK: SUBSXri $x0, 7, 0, implicit-def $nzcv
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# CHECK: bb.1:
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# CHECK-NOT: MOVi32imm
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name: test11
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $x0, $x1
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dead $xzr = SUBSXri killed $x0, 7, 0, implicit-def $nzcv
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Bcc 1, %bb.2, implicit killed $nzcv
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B %bb.1
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bb.1:
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liveins: $x1
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$w0 = MOVi32imm 7, implicit-def $x0
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STRXui killed $x0, killed $x1, 0
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bb.2:
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RET_ReallyLR
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...
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# Eliminate redundant MOVi32imm 7 in bb.1
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# Note: 64-bit compare/32-bit move imm
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# Kill marker should be removed from compare.
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# CHECK-LABEL: name: test12
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# CHECK: SUBSXri $x0, 7, 0, implicit-def $nzcv
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# CHECK: bb.1:
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# CHECK-NOT: MOVi32imm
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name: test12
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $x0, $x1
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dead $xzr = SUBSXri killed $x0, 7, 0, implicit-def $nzcv
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Bcc 1, %bb.2, implicit killed $nzcv
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B %bb.1
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bb.1:
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liveins: $x1
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$w0 = MOVi32imm 7
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STRWui killed $w0, killed $x1, 0
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bb.2:
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RET_ReallyLR
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...
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# Don't eliminate MOVi32imm 7 in bb.1 as we don't necessarily know the upper 32-bits.
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# Note: 32-bit compare/32-bit move imm w/implicit def
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# Kill marker should remain on compare.
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# CHECK-LABEL: name: test13
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# CHECK: SUBSWri killed $w0, 7, 0, implicit-def $nzcv
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# CHECK: bb.1:
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# CHECK: MOVi32imm
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name: test13
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $w0, $x1
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dead $wzr = SUBSWri killed $w0, 7, 0, implicit-def $nzcv
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Bcc 1, %bb.2, implicit killed $nzcv
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B %bb.1
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bb.1:
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liveins: $x1
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$w0 = MOVi32imm 7, implicit-def $x0
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STRXui killed $x0, killed $x1, 0
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bb.2:
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RET_ReallyLR
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...
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# We can't eliminate the MOVi32imm because of the clobbering LDRWui.
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# CHECK-LABEL: name: test14
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# CHECK: bb.1:
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# CHECK: MOVi32imm
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name: test14
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $w0, $x1, $x2
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dead $wzr = SUBSWri killed $w0, 7, 0, implicit-def $nzcv
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$w0 = LDRWui $x1, 0
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STRWui killed $w0, killed $x2, 0
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Bcc 1, %bb.2, implicit killed $nzcv
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B %bb.1
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bb.1:
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liveins: $x1
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$w0 = MOVi32imm 7
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STRWui killed $w0, killed $x1, 0
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bb.2:
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RET_ReallyLR
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...
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# We can't eliminate the MOVi32imm because of the clobbering LDRWui.
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# CHECK-LABEL: name: test15
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# CHECK: bb.1:
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# CHECK: MOVi32imm
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name: test15
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $w0, $x1, $x2
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dead $wzr = SUBSWri killed $w0, 7, 0, implicit-def $nzcv
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Bcc 1, %bb.2, implicit killed $nzcv
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B %bb.1
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bb.1:
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liveins: $x1, $x2
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$w0 = LDRWui $x1, 0
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STRWui killed $w0, killed $x2, 0
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$w0 = MOVi32imm 7
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STRWui killed $w0, killed $x1, 0
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bb.2:
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RET_ReallyLR
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...
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# Check that bb.0 COPY is seen through to allow the bb.1 MOVi32imm to be removed.
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# CHECK-LABEL: name: test16
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# CHECK: bb.1:
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# CHECK-NOT: MOVi32imm
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name: test16
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $w0, $x1
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dead $wzr = SUBSWri $w0, 7, 0, implicit-def $nzcv
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$w2 = COPY $w0
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Bcc 1, %bb.2, implicit killed $nzcv
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B %bb.1
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bb.1:
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liveins: $x1
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$w2 = MOVi32imm 7
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STRWui killed $w2, killed $x1, 0
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bb.2:
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RET_ReallyLR
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...
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# Check that bb.1 MOVi32imm is not removed due to self clobbering compare.
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# CHECK-LABEL: name: test17
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# CHECK: bb.1:
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# CHECK: MOVi32imm
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name: test17
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $w0, $x1
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dead $w0 = SUBSWri killed $w0, 7, 0, implicit-def $nzcv
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Bcc 1, %bb.2, implicit killed $nzcv
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B %bb.1
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bb.1:
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liveins: $x1
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$w0 = MOVi32imm 7
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STRWui killed $w0, killed $x1, 0
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bb.2:
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RET_ReallyLR
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...
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# Make sure the MOVi64imm is not removed. In one version of this patch the
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# MOVi64imm immediate was truncated to 32 bits and incorrectly matched because
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# the low 32 bits of 4252017623040 are all zero.
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# CHECK-LABEL: name: test18
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# CHECK: bb.1:
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# CHECK: MOVi64imm
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name: test18
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $x0, $x1
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CBNZX killed $x0, %bb.2
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B %bb.1
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bb.1:
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liveins: $x1
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$x0 = MOVi64imm 4252017623040
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STRXui killed $x0, killed $x1, 0
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bb.2:
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RET_ReallyLR
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...
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# Eliminate redundant MOVi32imm -1 in bb.1
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# Note: 32-bit compare/32-bit move imm
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# Kill marker should be removed from compare.
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# CHECK-LABEL: name: test19
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# CHECK: ADDSWri $w0, 1, 0, implicit-def $nzcv
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# CHECK: bb.1:
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# CHECK-NOT: MOVi32imm
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name: test19
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $w0, $x1
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dead $wzr = ADDSWri killed $w0, 1, 0, implicit-def $nzcv
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Bcc 1, %bb.2, implicit killed $nzcv
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B %bb.1
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bb.1:
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liveins: $x1
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$w0 = MOVi32imm -1
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STRWui killed $w0, killed $x1, 0
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bb.2:
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RET_ReallyLR
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...
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# Eliminate redundant MOVi64imm -1 in bb.1
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# Note: 64-bit compare/64-bit move imm
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# Kill marker should be removed from compare.
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# CHECK-LABEL: name: test20
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# CHECK: ADDSXri $x0, 1, 0, implicit-def $nzcv
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# CHECK: bb.1:
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# CHECK-NOT: MOVi64imm
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name: test20
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $x0, $x1
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dead $xzr = ADDSXri killed $x0, 1, 0, implicit-def $nzcv
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Bcc 1, %bb.2, implicit killed $nzcv
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B %bb.1
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bb.1:
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liveins: $x1
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$x0 = MOVi64imm -1
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STRXui killed $x0, killed $x1, 0
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bb.2:
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RET_ReallyLR
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...
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# Don't eliminate redundant MOVi32imm -1 in bb.1: the upper bits are nonzero.
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# Note: 64-bit compare/32-bit move imm
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# Kill marker should be removed from compare.
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# CHECK-LABEL: name: test21
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# CHECK: ADDSXri killed $x0, 1, 0, implicit-def $nzcv
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# CHECK: bb.1:
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# CHECK: MOVi32imm
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name: test21
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $x0, $x1
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dead $xzr = ADDSXri killed $x0, 1, 0, implicit-def $nzcv
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Bcc 1, %bb.2, implicit killed $nzcv
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B %bb.1
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bb.1:
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liveins: $x1
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$w0 = MOVi32imm -1
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STRWui killed $w0, killed $x1, 0
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bb.2:
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RET_ReallyLR
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...
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|
# Don't eliminate MOVi64imm -1 in bb.1 as we don't necessarily know the upper 32-bits.
|
|
# Note: 32-bit compare/64-bit move imm
|
|
# CHECK-LABEL: name: test22
|
|
# CHECK: bb.1:
|
|
# CHECK: MOVi64imm
|
|
name: test22
|
|
tracksRegLiveness: true
|
|
body: |
|
|
bb.0.entry:
|
|
liveins: $w0, $x1
|
|
|
|
dead $wzr = ADDSWri killed $w0, 1, 0, implicit-def $nzcv
|
|
Bcc 1, %bb.2, implicit killed $nzcv
|
|
B %bb.1
|
|
|
|
bb.1:
|
|
liveins: $x1
|
|
|
|
$x0 = MOVi64imm -1
|
|
STRXui killed $x0, killed $x1, 0
|
|
|
|
bb.2:
|
|
RET_ReallyLR
|
|
...
|
|
# Eliminate redundant MOVi32imm 4096 in bb.1 when the compare has a shifted immediate.
|
|
# CHECK-LABEL: name: test23
|
|
# CHECK: bb.1:
|
|
# CHECK-NOT: MOVi32imm
|
|
name: test23
|
|
tracksRegLiveness: true
|
|
body: |
|
|
bb.0.entry:
|
|
liveins: $w0, $x1
|
|
|
|
dead $wzr = SUBSWri killed $w0, 1, 12, implicit-def $nzcv
|
|
Bcc 1, %bb.2, implicit killed $nzcv
|
|
B %bb.1
|
|
|
|
bb.1:
|
|
liveins: $x1
|
|
|
|
$w0 = MOVi32imm 4096
|
|
STRWui killed $w0, killed $x1, 0
|
|
|
|
bb.2:
|
|
RET_ReallyLR
|