test/CodeGen/AArch64/GlobalISel/legalize-combines.mir

# RUN: llc -O0 -run-pass=legalizer -global-isel %s -o - | FileCheck %s

--- |
  target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
  target triple = "aarch64--"
  define void @test_combines_2() { ret void }
  define void @test_combines_3() { ret void }
  define void @test_combines_4() { ret void }
  define void @test_combines_5() { ret void }
  define void @test_combines_6() { ret void }
...

---
name:            test_combines_2
body: |
  bb.0:
    liveins: %w0

    %0:_(s32) = COPY %w0

      ; Similarly, here the types don't match.
    ; CHECK-LABEL: name: test_combines_2
    ; CHECK: %2(s64) = G_MERGE_VALUES %0(s32), %1(s32)
    ; CHECK: %3(s1) = G_EXTRACT %2(s64), 0
    ; CHECK: %4(s64) = G_EXTRACT %2(s64), 0
    %1:_(s32) = G_ADD %0, %0
    %2:_(s64) = G_MERGE_VALUES %0, %1
    %3:_(s1) = G_EXTRACT %2, 0
    %4:_(s64) = G_EXTRACT %2, 0
...

---
name:            test_combines_3
body: |
  bb.0:
    liveins: %w0

    %0:_(s32) = COPY %w0

    ; CHECK-LABEL: name: test_combines_3
    ; CHECK: %1(s32) = G_ADD %0, %0
    ; CHECK-NOT: G_SEQUENCE
    ; CHECK-NOT: G_EXTRACT
    ; CHECK: %5(s32) = G_ADD %0, %1
    %1:_(s32) = G_ADD %0, %0
    %2:_(s64) = G_MERGE_VALUES %0, %1
    %3:_(s32), %4:_(s32) = G_UNMERGE_VALUES %2
    %5:_(s32) = G_ADD %3, %4
...

---
name:            test_combines_4
body: |
  bb.0:
    liveins: %x0

    %0:_(s64) = COPY %x0

    ; CHECK-LABEL: name: test_combines_4
    ; CHECK: %2(s64) = COPY %0(s64)
    ; CHECK: %3(s64) = G_ADD %2, %2
    %1:_(s128) = G_MERGE_VALUES %0, %0
    %2:_(s64) = G_EXTRACT %1, 0
    %3:_(s64) = G_ADD %2, %2
...

---
name:            test_combines_5
body: |
  bb.0:
    liveins: %w0

    %0:_(s32) = COPY %w0

    ; CHECK-LABEL: name: test_combines_5
    ; CHECK-NOT: G_MERGE_VALUES
    ; CHECK-NOT: G_EXTRACT
    ; CHECK: %5(s32) = G_ADD %0, %1
    %1:_(s32) = G_ADD %0, %0
    %2:_(s64) = G_MERGE_VALUES %0, %1
    %3:_(s32), %4:_(s32) = G_UNMERGE_VALUES %2
    %5:_(s32) = G_ADD %3, %4
...

---
name:            test_combines_6
body: |
  bb.0:
    liveins: %w0

    ; CHECK-LABEL: name: test_combines_6
    ; CHECK: %0(s32) = COPY %w0
    %0:_(s32) = COPY %w0

    ; Check that we replace all the uses of a G_EXTRACT.
    ; CHECK-NOT: G_MERGE_VALUES
    ; CHECK-NOT: G_EXTRACT
    ; CHECK: %3(s32) = G_MUL %0, %0
    ; CHECK: %4(s32) = G_ADD %0, %3
    %1:_(s32) = G_MERGE_VALUES %0
    %2:_(s32) = G_UNMERGE_VALUES %1
    %3:_(s32) = G_MUL %2, %2
    %4:_(s32) = G_ADD %2, %3
...