diff options
Diffstat (limited to 'test/CodeGen/MIR/AArch64/machine-dead-copy.mir')
| -rw-r--r-- | test/CodeGen/MIR/AArch64/machine-dead-copy.mir | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/test/CodeGen/MIR/AArch64/machine-dead-copy.mir b/test/CodeGen/MIR/AArch64/machine-dead-copy.mir new file mode 100644 index 000000000000..90f2f3c09993 --- /dev/null +++ b/test/CodeGen/MIR/AArch64/machine-dead-copy.mir @@ -0,0 +1,71 @@ + +# 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 +allVRegsAllocated: true +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 +allVRegsAllocated: true +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 +allVRegsAllocated: true +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 +allVRegsAllocated: true +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 +... + |
