mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 19:23:23 +01:00
f63551d3a5
This patch removes unnecessary zero copies in BBs that are targets of b.eq/b.ne and we know the result of the compare instruction is zero. For example, BB#0: subs w0, w1, w2 str w0, [x1] b.ne .LBB0_2 BB#1: mov w0, wzr ; <-- redundant str w0, [x2] .LBB0_2 Differential Revision: https://reviews.llvm.org/D35075 llvm-svn: 308849
566 lines
11 KiB
YAML
566 lines
11 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-LABEL: name: test1
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# CHECK: ANDSWri %w0, 1, implicit-def %nzcv
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# CHECK: bb.1:
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# CHECK-NOT: COPY %wzr
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name: test1
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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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%w0 = ANDSWri %w0, 1, implicit-def %nzcv
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STRWui killed %w0, killed %x1, 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: %x2
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%w0 = COPY %wzr
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STRWui killed %w0, killed %x2, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test2
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# CHECK: ANDSXri %x0, 1, implicit-def %nzcv
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# CHECK: bb.1:
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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.entry:
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liveins: %x0, %x1, %x2
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%x0 = ANDSXri %x0, 1, implicit-def %nzcv
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STRXui killed %x0, killed %x1, 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: %x2
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%x0 = COPY %xzr
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STRXui killed %x0, killed %x2, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test3
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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: COPY %wzr
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name: test3
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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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%w0 = ADDSWri %w0, 1, 0, implicit-def %nzcv
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STRWui killed %w0, killed %x1, 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: %x2
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%w0 = COPY %wzr
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STRWui killed %w0, killed %x2, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test4
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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: 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.entry:
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liveins: %x0, %x1, %x2
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%x0 = ADDSXri %x0, 1, 0, implicit-def %nzcv
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STRXui killed %x0, killed %x1, 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: %x2
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%x0 = COPY %xzr
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STRXui killed %x0, killed %x2, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test5
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# CHECK: SUBSWri %w0, 1, 0, implicit-def %nzcv
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# CHECK: bb.1:
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# CHECK-NOT: COPY %wzr
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name: test5
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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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%w0 = SUBSWri %w0, 1, 0, implicit-def %nzcv
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STRWui killed %w0, killed %x1, 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: %x2
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%w0 = COPY %wzr
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STRWui killed %w0, killed %x2, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test6
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# CHECK: SUBSXri %x0, 1, 0, implicit-def %nzcv
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# CHECK: bb.1:
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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.entry:
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liveins: %x0, %x1, %x2
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%x0 = SUBSXri %x0, 1, 0, implicit-def %nzcv
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STRXui killed %x0, killed %x1, 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: %x2
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%x0 = COPY %xzr
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STRXui killed %x0, killed %x2, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test7
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# CHECK: ADDSWrr %w0, %w1, implicit-def %nzcv
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# CHECK: bb.1:
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# CHECK-NOT: COPY %wzr
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name: test7
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: %w0, %w1, %x2, %x3
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%w0 = ADDSWrr %w0, %w1, implicit-def %nzcv
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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: %x3
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%w0 = COPY %wzr
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STRWui killed %w0, killed %x3, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test8
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# CHECK: ADDSXrr %x0, %x1, implicit-def %nzcv
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# CHECK: bb.1:
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# CHECK-NOT: 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.entry:
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liveins: %x0, %x1, %x2, %x3
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%x0 = ADDSXrr %x0, %x1, implicit-def %nzcv
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STRXui killed %x0, 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: %x3
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%x0 = COPY %xzr
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STRXui killed %x0, killed %x3, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test9
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# CHECK: ANDSWrr %w0, %w1, implicit-def %nzcv
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# CHECK: bb.1:
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# CHECK-NOT: COPY %wzr
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name: test9
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: %w0, %w1, %x2, %x3
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%w0 = ANDSWrr %w0, %w1, implicit-def %nzcv
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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: %x3
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%w0 = COPY %wzr
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STRWui killed %w0, killed %x3, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test10
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# CHECK: ANDSXrr %x0, %x1, implicit-def %nzcv
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# CHECK: bb.1:
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# CHECK-NOT: COPY %xzr
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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: %x0, %x1, %x2, %x3
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%x0 = ANDSXrr %x0, %x1, implicit-def %nzcv
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STRXui killed %x0, 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: %x3
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%x0 = COPY %xzr
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STRXui killed %x0, killed %x3, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test11
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# CHECK: BICSWrr %w0, %w1, implicit-def %nzcv
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# CHECK: bb.1:
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# CHECK-NOT: COPY %wzr
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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: %w0, %w1, %x2, %x3
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%w0 = BICSWrr %w0, %w1, implicit-def %nzcv
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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: %x3
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%w0 = COPY %wzr
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STRWui killed %w0, killed %x3, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test12
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# CHECK: BICSXrr %x0, %x1, implicit-def %nzcv
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# CHECK: bb.1:
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# CHECK-NOT: COPY %xzr
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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, %x2, %x3
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%x0 = BICSXrr %x0, %x1, implicit-def %nzcv
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STRXui killed %x0, 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: %x3
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%x0 = COPY %xzr
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STRXui killed %x0, killed %x3, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test13
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# CHECK: SUBSWrr %w0, %w1, implicit-def %nzcv
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# CHECK: bb.1:
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# CHECK-NOT: COPY %wzr
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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, %w1, %x2, %x3
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%w0 = SUBSWrr %w0, %w1, implicit-def %nzcv
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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: %x3
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%w0 = COPY %wzr
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STRWui killed %w0, killed %x3, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test14
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# CHECK: SUBSXrr %x0, %x1, implicit-def %nzcv
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# CHECK: bb.1:
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# CHECK-NOT: COPY %xzr
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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: %x0, %x1, %x2, %x3
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%x0 = SUBSXrr %x0, %x1, implicit-def %nzcv
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STRXui killed %x0, 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: %x3
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%x0 = COPY %xzr
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STRXui killed %x0, killed %x3, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test15
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# CHECK: ADDSWrs %w0, %w1, 0, implicit-def %nzcv
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# CHECK: bb.1:
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# CHECK-NOT: COPY %wzr
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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, %w1, %x2, %x3
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%w0 = ADDSWrs %w0, %w1, 0, implicit-def %nzcv
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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: %x3
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%w0 = COPY %wzr
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STRWui killed %w0, killed %x3, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test16
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# CHECK: ADDSXrs %x0, %x1, 0, implicit-def %nzcv
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# CHECK: bb.1:
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# CHECK-NOT: COPY %xzr
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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: %x0, %x1, %x2, %x3
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%x0 = ADDSXrs %x0, %x1, 0, implicit-def %nzcv
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STRXui killed %x0, 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: %x3
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%x0 = COPY %xzr
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STRXui killed %x0, killed %x3, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test17
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# CHECK: ANDSWrs %w0, %w1, 0, implicit-def %nzcv
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# CHECK: bb.1:
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# CHECK-NOT: COPY %wzr
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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, %w1, %x2, %x3
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%w0 = ANDSWrs %w0, %w1, 0, implicit-def %nzcv
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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: %x3
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%w0 = COPY %wzr
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STRWui killed %w0, killed %x3, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test18
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# CHECK: ANDSXrs %x0, %x1, 0, implicit-def %nzcv
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# CHECK: bb.1:
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# CHECK-NOT: COPY %xzr
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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, %x2, %x3
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%x0 = ANDSXrs %x0, %x1, 0, implicit-def %nzcv
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STRXui killed %x0, 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: %x3
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%x0 = COPY %xzr
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STRXui killed %x0, killed %x3, 0
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bb.2:
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RET_ReallyLR
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...
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# CHECK-LABEL: name: test19
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# CHECK: BICSWrs %w0, %w1, 0, implicit-def %nzcv
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# CHECK: bb.1:
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# CHECK-NOT: COPY %wzr
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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, %w1, %x2, %x3
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%w0 = BICSWrs %w0, %w1, 0, implicit-def %nzcv
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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: %x3
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%w0 = COPY %wzr
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STRWui killed %w0, killed %x3, 0
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bb.2:
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RET_ReallyLR
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|
...
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# Unicorn test - we can remove a redundant copy and a redundant mov
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# CHECK-LABEL: name: test20
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# CHECK: SUBSWri %w1, 1, 0, implicit-def %nzcv
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# CHECK: bb.1:
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# CHECK-NOT: %w0 = COPY %wzr
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# CHECK-NOT: %w1 = MOVi32imm 1
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name: test20
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: %w1, %x2
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%w0 = SUBSWri %w1, 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: %x2
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%w0 = COPY %wzr
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%w1 = MOVi32imm 1
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STRWui killed %w0, %x2, 0
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|
STRWui killed %w1, killed %x2, 1
|
|
|
|
bb.2:
|
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RET_ReallyLR
|
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|
|
...
|
|
# Negative test - MOVi32imm clobbers %w0
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# CHECK-LABEL: name: test21
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|
# CHECK: ANDSWri %w0, 1, implicit-def %nzcv
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|
# CHECK: bb.1:
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|
# CHECK: %w0 = COPY %wzr
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|
name: test21
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|
tracksRegLiveness: true
|
|
body: |
|
|
bb.0.entry:
|
|
liveins: %w0, %x1, %x2
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|
|
|
%w0 = ANDSWri %w0, 1, implicit-def %nzcv
|
|
STRWui killed %w0, %x1, 0
|
|
%w0 = MOVi32imm -1
|
|
STRWui killed %w0, killed %x1, 1
|
|
Bcc 1, %bb.2, implicit killed %nzcv
|
|
B %bb.1
|
|
|
|
bb.1:
|
|
liveins: %x2
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|
|
|
%w0 = COPY %wzr
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|
STRWui killed %w0, killed %x2, 0
|
|
|
|
bb.2:
|
|
RET_ReallyLR
|
|
...
|
|
# Negative test - SUBSXri self-clobbers x0, so MOVi64imm can't be removed
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|
# CHECK-LABEL: name: test22
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|
# CHECK: SUBSXri %x0, 1, 0, implicit-def %nzcv
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|
# CHECK: bb.1:
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|
# CHECK: %x0 = MOVi64imm 1
|
|
name: test22
|
|
tracksRegLiveness: true
|
|
body: |
|
|
bb.0.entry:
|
|
liveins: %x0, %x1, %x2
|
|
|
|
%x0 = SUBSXri %x0, 1, 0, implicit-def %nzcv
|
|
STRXui killed %x0, killed %x1, 0
|
|
Bcc 1, %bb.2, implicit killed %nzcv
|
|
B %bb.1
|
|
|
|
bb.1:
|
|
liveins: %x2
|
|
|
|
%x0 = MOVi64imm 1
|
|
STRXui killed %x0, killed %x2, 0
|
|
|
|
bb.2:
|
|
RET_ReallyLR
|
|
...
|
|
# Negative test - bb.1 has multiple preds
|
|
# CHECK-LABEL: name: test23
|
|
# CHECK: ADDSWri %w0, 1, 0, implicit-def %nzcv
|
|
# CHECK: bb.1:
|
|
# CHECK: COPY %wzr
|
|
name: test23
|
|
tracksRegLiveness: true
|
|
body: |
|
|
bb.0.entry:
|
|
liveins: %w0, %x1, %x2
|
|
|
|
%w0 = ADDSWri %w0, 1, 0, implicit-def %nzcv
|
|
STRWui killed %w0, killed %x1, 0
|
|
Bcc 1, %bb.2, implicit killed %nzcv
|
|
B %bb.1
|
|
|
|
bb.3:
|
|
B %bb.1
|
|
|
|
bb.1:
|
|
liveins: %x2
|
|
|
|
%w0 = COPY %wzr
|
|
STRWui killed %w0, killed %x2, 0
|
|
|
|
bb.2:
|
|
RET_ReallyLR
|