[ARM] GlobalISel: Add more tests. NFC

Add a couple of tests to increase coverage for the TableGen'erated code,
in particular for rules where 2 generic instructions may be combined
into a single machine instruction.

llvm-svn: 304971

1 files changed, 149 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/ARM/GlobalISel/arm-instruction-select-combos.mir b/llvm/test/CodeGen/ARM/GlobalISel/arm-instruction-select-combos.mir
new file mode 100644
index 00000000000..d7f208d4cf5
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/GlobalISel/arm-instruction-select-combos.mir
@@ -0,0 +1,149 @@
+# RUN: llc -O0 -mtriple arm-- -global-isel -run-pass=instruction-select -verify-machineinstrs %s -o - | FileCheck %s
+--- |
+  define void @test_mla() #0 { ret void }
+  define void @test_mla_v5() #1 { ret void }
+
+  define void @test_mls() #2 { ret void }
+  define void @test_no_mls() { ret void }
+
+  attributes #0 = { "target-features"="+v6" }
+  attributes #1 = { "target-features"="-v6" }
+  attributes #2 = { "target-features"="+v6t2" }
+...
+---
+name:            test_mla
+# CHECK-LABEL: name: test_mla
+legalized:       true
+regBankSelected: true
+selected:        false
+# CHECK: selected: true
+registers:
+  - { id: 0, class: gprb }
+  - { id: 1, class: gprb }
+  - { id: 2, class: gprb }
+  - { id: 3, class: gprb }
+  - { id: 4, class: gprb }
+body:             |
+  bb.0:
+    liveins: %r0, %r1, %r2
+
+    %0(s32) = COPY %r0
+    %1(s32) = COPY %r1
+    %2(s32) = COPY %r2
+    ; CHECK: [[VREGX:%[0-9]+]] = COPY %r0
+    ; CHECK: [[VREGY:%[0-9]+]] = COPY %r1
+    ; CHECK: [[VREGZ:%[0-9]+]] = COPY %r2
+
+    %3(s32) = G_MUL %0, %1
+    %4(s32) = G_ADD %3, %2
+    ; CHECK: [[VREGR:%[0-9]+]] = MLA [[VREGX]], [[VREGY]], [[VREGZ]], 14, _, _
+
+    %r0 = COPY %4(s32)
+    ; CHECK: %r0 = COPY [[VREGR]]
+
+    BX_RET 14, _, implicit %r0
+    ; CHECK: BX_RET 14, _, implicit %r0
+...
+---
+name:            test_mla_v5
+# CHECK-LABEL: name: test_mla_v5
+legalized:       true
+regBankSelected: true
+selected:        false
+# CHECK: selected: true
+registers:
+  - { id: 0, class: gprb }
+  - { id: 1, class: gprb }
+  - { id: 2, class: gprb }
+  - { id: 3, class: gprb }
+  - { id: 4, class: gprb }
+body:             |
+  bb.0:
+    liveins: %r0, %r1, %r2
+
+    %0(s32) = COPY %r0
+    %1(s32) = COPY %r1
+    %2(s32) = COPY %r2
+    ; CHECK: [[VREGX:%[0-9]+]] = COPY %r0
+    ; CHECK: [[VREGY:%[0-9]+]] = COPY %r1
+    ; CHECK: [[VREGZ:%[0-9]+]] = COPY %r2
+
+    %3(s32) = G_MUL %0, %1
+    %4(s32) = G_ADD %3, %2
+    ; CHECK: [[VREGR:%[0-9]+]] = MLAv5 [[VREGX]], [[VREGY]], [[VREGZ]], 14, _, _
+
+    %r0 = COPY %4(s32)
+    ; CHECK: %r0 = COPY [[VREGR]]
+
+    BX_RET 14, _, implicit %r0
+    ; CHECK: BX_RET 14, _, implicit %r0
+...
+---
+name:            test_mls
+# CHECK-LABEL: name: test_mls
+legalized:       true
+regBankSelected: true
+selected:        false
+# CHECK: selected: true
+registers:
+  - { id: 0, class: gprb }
+  - { id: 1, class: gprb }
+  - { id: 2, class: gprb }
+  - { id: 3, class: gprb }
+  - { id: 4, class: gprb }
+body:             |
+  bb.0:
+    liveins: %r0, %r1, %r2
+
+    %0(s32) = COPY %r0
+    %1(s32) = COPY %r1
+    %2(s32) = COPY %r2
+    ; CHECK: [[VREGX:%[0-9]+]] = COPY %r0
+    ; CHECK: [[VREGY:%[0-9]+]] = COPY %r1
+    ; CHECK: [[VREGZ:%[0-9]+]] = COPY %r2
+
+    %3(s32) = G_MUL %0, %1
+    %4(s32) = G_SUB %2, %3
+    ; CHECK: [[VREGR:%[0-9]+]] = MLS [[VREGX]], [[VREGY]], [[VREGZ]], 14, _
+
+    %r0 = COPY %4(s32)
+    ; CHECK: %r0 = COPY [[VREGR]]
+
+    BX_RET 14, _, implicit %r0
+    ; CHECK: BX_RET 14, _, implicit %r0
+...
+---
+name:            test_no_mls
+# CHECK-LABEL: name: test_no_mls
+legalized:       true
+regBankSelected: true
+selected:        false
+# CHECK: selected: true
+registers:
+  - { id: 0, class: gprb }
+  - { id: 1, class: gprb }
+  - { id: 2, class: gprb }
+  - { id: 3, class: gprb }
+  - { id: 4, class: gprb }
+body:             |
+  bb.0:
+    liveins: %r0, %r1, %r2
+
+    %0(s32) = COPY %r0
+    %1(s32) = COPY %r1
+    %2(s32) = COPY %r2
+    ; CHECK: [[VREGX:%[0-9]+]] = COPY %r0
+    ; CHECK: [[VREGY:%[0-9]+]] = COPY %r1
+    ; CHECK: [[VREGZ:%[0-9]+]] = COPY %r2
+
+    %3(s32) = G_MUL %0, %1
+    %4(s32) = G_SUB %2, %3
+    ; CHECK: [[VREGM:%[0-9]+]] = MULv5 [[VREGX]], [[VREGY]], 14, _, _
+    ; CHECK: [[VREGR:%[0-9]+]] = SUBrr [[VREGZ]], [[VREGM]], 14, _, _
+
+    %r0 = COPY %4(s32)
+    ; CHECK: %r0 = COPY [[VREGR]]
+
+    BX_RET 14, _, implicit %r0
+    ; CHECK: BX_RET 14, _, implicit %r0
+...