[ARM] GlobalISel: Support G_AND

This is identical to the support for the other binary operators:
- widen to s32
- map into GPR
- select ANDrr (via TableGen'erated code)

llvm-svn: 304885

lib/Target/ARM/ARMLegalizerInfo.cpp

@@ -45,7 +45,7 @@ ARMLegalizerInfo::ARMLegalizerInfo(const ARMSubtarget &ST) {
     setAction({Op, 1, p0}, Legal);
   }
 
-  for (unsigned Op : {G_ADD, G_SUB, G_MUL}) {
+  for (unsigned Op : {G_ADD, G_SUB, G_MUL, G_AND}) {
     for (auto Ty : {s1, s8, s16})
       setAction({Op, Ty}, WidenScalar);
     setAction({Op, s32}, Legal);

lib/Target/ARM/ARMRegisterBankInfo.cpp

@@ -221,6 +221,7 @@ ARMRegisterBankInfo::getInstrMapping(const MachineInstr &MI) const {
   case G_ADD:
   case G_SUB:
   case G_MUL:
+  case G_AND:
   case G_SDIV:
   case G_UDIV:
   case G_SEXT:

test/CodeGen/ARM/GlobalISel/arm-instruction-select.mir

@@ -28,6 +28,8 @@
   define void @test_sdiv_s32() #2 { ret void }
   define void @test_udiv_s32() #2 { ret void }
 
+  define void @test_and_s32() { ret void }
+
   define void @test_load_from_stack() { ret void }
   define void @test_load_f32() #0 { ret void }
   define void @test_load_f64() #0 { ret void }
@@ -783,6 +785,39 @@ body:             |
     ; CHECK: BX_RET 14, _, implicit %r0
 ...
 ---
+name:            test_and_s32
+# CHECK-LABEL: name: test_and_s32
+legalized:       true
+regBankSelected: true
+selected:        false
+# CHECK: selected: true
+registers:
+  - { id: 0, class: gprb }
+  - { id: 1, class: gprb }
+  - { id: 2, class: gprb }
+# CHECK: id: 0, class: gpr
+# CHECK: id: 1, class: gpr
+# CHECK: id: 2, class: gpr
+body:             |
+  bb.0:
+    liveins: %r0, %r1
+
+    %0(s32) = COPY %r0
+    ; CHECK: [[VREGX:%[0-9]+]] = COPY %r0
+
+    %1(s32) = COPY %r1
+    ; CHECK: [[VREGY:%[0-9]+]] = COPY %r1
+
+    %2(s32) = G_AND %0, %1
+    ; CHECK: [[VREGRES:%[0-9]+]] = ANDrr [[VREGX]], [[VREGY]], 14, _
+
+    %r0 = COPY %2(s32)
+    ; CHECK: %r0 = COPY [[VREGRES]]
+
+    BX_RET 14, _, implicit %r0
+    ; CHECK: BX_RET 14, _, implicit %r0
+...
+---
 name:            test_load_from_stack
 # CHECK-LABEL: name: test_load_from_stack
 legalized:       true

test/CodeGen/ARM/GlobalISel/arm-isel.ll

@@ -153,6 +153,33 @@ entry:
   ret i32 %sum
 }
 
+define i8 @test_and_i8(i8 %x, i8 %y) {
+; CHECK-LABEL: test_and_i8:
+; CHECK: and r0, r0, r1
+; CHECK: bx lr
+entry:
+  %sum = and i8 %x, %y
+  ret i8 %sum
+}
+
+define i16 @test_and_i16(i16 %x, i16 %y) {
+; CHECK-LABEL: test_and_i16:
+; CHECK: and r0, r0, r1
+; CHECK: bx lr
+entry:
+  %sum = and i16 %x, %y
+  ret i16 %sum
+}
+
+define i32 @test_and_i32(i32 %x, i32 %y) {
+; CHECK-LABEL: test_and_i32:
+; CHECK: and r0, r0, r1
+; CHECK: bx lr
+entry:
+  %sum = and i32 %x, %y
+  ret i32 %sum
+}
+
 define i32 @test_stack_args_i32(i32 %p0, i32 %p1, i32 %p2, i32 %p3, i32 %p4, i32 %p5) {
 ; CHECK-LABEL: test_stack_args_i32:
 ; CHECK: add [[P5ADDR:r[0-9]+]], sp, #4

test/CodeGen/ARM/GlobalISel/arm-legalizer.mir

@@ -15,6 +15,10 @@
   define void @test_mul_s16() { ret void }
   define void @test_mul_s32() { ret void }
 
+  define void @test_and_s8() { ret void }
+  define void @test_and_s16() { ret void }
+  define void @test_and_s32() { ret void }
+
   define void @test_load_from_stack() { ret void }
   define void @test_legal_loads() #0 { ret void }
   define void @test_legal_stores() #0 { ret void }
@@ -299,6 +303,82 @@ body:             |
     %r0 = COPY %2(s32)
     BX_RET 14, _, implicit %r0
 
+...
+---
+name:            test_and_s8
+# CHECK-LABEL: name: test_and_s8
+legalized:       false
+# CHECK: legalized: true
+regBankSelected: false
+selected:        false
+tracksRegLiveness: true
+registers:
+  - { id: 0, class: _ }
+  - { id: 1, class: _ }
+  - { id: 2, class: _ }
+body:             |
+  bb.0:
+    liveins: %r0, %r1
+
+    %0(s8) = COPY %r0
+    %1(s8) = COPY %r1
+    %2(s8) = G_AND %0, %1
+    ; G_AND with s8 should widen
+    ; CHECK: {{%[0-9]+}}(s32) = G_AND {{%[0-9]+, %[0-9]+}}
+    ; CHECK-NOT: {{%[0-9]+}}(s8) = G_AND {{%[0-9]+, %[0-9]+}}
+    %r0 = COPY %2(s8)
+    BX_RET 14, _, implicit %r0
+...
+---
+name:            test_and_s16
+# CHECK-LABEL: name: test_and_s16
+legalized:       false
+# CHECK: legalized: true
+regBankSelected: false
+selected:        false
+tracksRegLiveness: true
+registers:
+  - { id: 0, class: _ }
+  - { id: 1, class: _ }
+  - { id: 2, class: _ }
+body:             |
+  bb.0:
+    liveins: %r0, %r1
+
+    %0(s16) = COPY %r0
+    %1(s16) = COPY %r1
+    %2(s16) = G_AND %0, %1
+    ; G_AND with s16 should widen
+    ; CHECK: {{%[0-9]+}}(s32) = G_AND {{%[0-9]+, %[0-9]+}}
+    ; CHECK-NOT: {{%[0-9]+}}(s16) = G_AND {{%[0-9]+, %[0-9]+}}
+    %r0 = COPY %2(s16)
+    BX_RET 14, _, implicit %r0
+
+...
+---
+name:            test_and_s32
+# CHECK-LABEL: name: test_and_s32
+legalized:       false
+# CHECK: legalized: true
+regBankSelected: false
+selected:        false
+tracksRegLiveness: true
+registers:
+  - { id: 0, class: _ }
+  - { id: 1, class: _ }
+  - { id: 2, class: _ }
+body:             |
+  bb.0:
+    liveins: %r0, %r1
+
+    %0(s32) = COPY %r0
+    %1(s32) = COPY %r1
+    %2(s32) = G_AND %0, %1
+    ; G_AND with s32 is legal, so we should find it unchanged in the output
+    ; CHECK: {{%[0-9]+}}(s32) = G_AND {{%[0-9]+, %[0-9]+}}
+    %r0 = COPY %2(s32)
+    BX_RET 14, _, implicit %r0
+
 ...
 ---
 name:            test_load_from_stack

test/CodeGen/ARM/GlobalISel/arm-regbankselect.mir

@@ -16,6 +16,8 @@
   define void @test_sdiv_s32() #1 { ret void }
   define void @test_udiv_s32() #1 { ret void }
 
+  define void @test_and_s32() { ret void}
+
   define void @test_loads() #0 { ret void }
   define void @test_stores() #0 { ret void }
 
@@ -412,6 +414,32 @@ body:             |
     %r0 = COPY %2(s32)
     BX_RET 14, _, implicit %r0
 
+...
+---
+name:            test_and_s32
+# CHECK-LABEL: name: test_and_s32
+legalized:       true
+regBankSelected: false
+selected:        false
+# CHECK: registers:
+# CHECK: - { id: 0, class: gprb, preferred-register: '' }
+# CHECK: - { id: 1, class: gprb, preferred-register: '' }
+# CHECK: - { id: 2, class: gprb, preferred-register: '' }
+
+registers:
+  - { id: 0, class: _ }
+  - { id: 1, class: _ }
+  - { id: 2, class: _ }
+body:             |
+  bb.0:
+    liveins: %r0, %r1
+
+    %0(s32) = COPY %r0
+    %1(s32) = COPY %r1
+    %2(s32) = G_AND %0, %1
+    %r0 = COPY %2(s32)
+    BX_RET 14, _, implicit %r0
+
 ...
 ---
 name:            test_loads