| |
| # RUN: llc -mtriple=aarch64-none-linux-gnu -run-pass machine-cp -verify-machineinstrs -o - %s | FileCheck %s |
| |
| --- | |
| define i32 @copyprop1(i32 %a, i32 %b) { ret i32 %a } |
| define i32 @copyprop2(i32 %a, i32 %b) { ret i32 %a } |
| define i32 @copyprop3(i32 %a, i32 %b) { ret i32 %a } |
| define i32 @copyprop4(i32 %a, i32 %b) { ret i32 %a } |
| declare i32 @foo(i32) |
| ... |
| --- |
| # The first copy is dead copy which is not used. |
| # CHECK-LABEL: name: copyprop1 |
| # CHECK: bb.0: |
| # CHECK-NOT: %w20 = COPY |
| name: copyprop1 |
| body: | |
| bb.0: |
| liveins: %w0, %w1 |
| %w20 = COPY %w1 |
| BL @foo, csr_aarch64_aapcs, implicit %w0, implicit-def %w0 |
| RET_ReallyLR implicit %w0 |
| ... |
| --- |
| # The first copy is not a dead copy which is used in the second copy after the |
| # call. |
| # CHECK-LABEL: name: copyprop2 |
| # CHECK: bb.0: |
| # CHECK: %w20 = COPY |
| name: copyprop2 |
| body: | |
| bb.0: |
| liveins: %w0, %w1 |
| %w20 = COPY %w1 |
| BL @foo, csr_aarch64_aapcs, implicit %w0, implicit-def %w0 |
| %w0 = COPY %w20 |
| RET_ReallyLR implicit %w0 |
| ... |
| --- |
| # Both the first and second copy are dead copies which are not used. |
| # CHECK-LABEL: name: copyprop3 |
| # CHECK: bb.0: |
| # CHECK-NOT: COPY |
| name: copyprop3 |
| body: | |
| bb.0: |
| liveins: %w0, %w1 |
| %w20 = COPY %w1 |
| BL @foo, csr_aarch64_aapcs, implicit %w0, implicit-def %w0 |
| %w20 = COPY %w0 |
| RET_ReallyLR implicit %w0 |
| ... |
| # The second copy is removed as a NOP copy, after then the first copy become |
| # dead which should be removed as well. |
| # CHECK-LABEL: name: copyprop4 |
| # CHECK: bb.0: |
| # CHECK-NOT: COPY |
| name: copyprop4 |
| body: | |
| bb.0: |
| liveins: %w0, %w1 |
| %w20 = COPY %w0 |
| %w0 = COPY %w20 |
| BL @foo, csr_aarch64_aapcs, implicit %w0, implicit-def %w0 |
| RET_ReallyLR implicit %w0 |
| ... |
| |