[ARM GlobalISel] Map G_FMA to FPR

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@322367 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMRegisterBankInfo.cpp b/lib/Target/ARM/ARMRegisterBankInfo.cpp
index fb3553f..37fb50b 100644 (file)
--- a/lib/Target/ARM/ARMRegisterBankInfo.cpp
+++ b/lib/Target/ARM/ARMRegisterBankInfo.cpp
@@ -271,6 +271,20 @@ ARMRegisterBankInfo::getInstrMapping(const MachineInstr &MI) const {
                           : &ARM::ValueMappings[ARM::SPR3OpsIdx];
     break;
   }
+  case G_FMA: {
+    LLT Ty = MRI.getType(MI.getOperand(0).getReg());
+    OperandsMapping =
+        Ty.getSizeInBits() == 64
+            ? getOperandsMapping({&ARM::ValueMappings[ARM::DPR3OpsIdx],
+                                  &ARM::ValueMappings[ARM::DPR3OpsIdx],
+                                  &ARM::ValueMappings[ARM::DPR3OpsIdx],
+                                  &ARM::ValueMappings[ARM::DPR3OpsIdx]})
+            : getOperandsMapping({&ARM::ValueMappings[ARM::SPR3OpsIdx],
+                                  &ARM::ValueMappings[ARM::SPR3OpsIdx],
+                                  &ARM::ValueMappings[ARM::SPR3OpsIdx],
+                                  &ARM::ValueMappings[ARM::SPR3OpsIdx]});
+    break;
+  }
   case G_CONSTANT:
   case G_FRAME_INDEX:
   case G_GLOBAL_VALUE:

diff --git a/test/CodeGen/ARM/GlobalISel/arm-regbankselect.mir b/test/CodeGen/ARM/GlobalISel/arm-regbankselect.mir
index 049f4c6..844bdf8 100644 (file)
--- a/test/CodeGen/ARM/GlobalISel/arm-regbankselect.mir
+++ b/test/CodeGen/ARM/GlobalISel/arm-regbankselect.mir
@@ -62,10 +62,14 @@
   define void @test_fneg_s32() #0 { ret void }
   define void @test_fneg_s64() #0 { ret void }
 
+  define void @test_fma_s32() #2 { ret void }
+  define void @test_fma_s64() #2 { ret void }
+
   define void @test_soft_fp_s64() #0 { ret void }
 
   attributes #0 = { "target-features"="+vfp2"}
   attributes #1 = { "target-features"="+hwdiv-arm" }
+  attributes #2 = { "target-features"="+vfp4"}
 ...
 ---
 name:            test_add_s32
@@ -1104,7 +1108,6 @@ selected:        false
 # CHECK: registers:
 # CHECK: - { id: 0, class: fprb, preferred-register: '' }
 # CHECK: - { id: 1, class: fprb, preferred-register: '' }
-
 registers:
   - { id: 0, class: _ }
   - { id: 1, class: _ }
@@ -1127,7 +1130,6 @@ selected:        false
 # CHECK: registers:
 # CHECK: - { id: 0, class: fprb, preferred-register: '' }
 # CHECK: - { id: 1, class: fprb, preferred-register: '' }
-
 registers:
   - { id: 0, class: _ }
   - { id: 1, class: _ }
@@ -1142,6 +1144,60 @@ body:             |
 
 ...
 ---
+name:            test_fma_s32
+# CHECK-LABEL: name: test_fma_s32
+legalized:       true
+regBankSelected: false
+selected:        false
+# CHECK: registers:
+# CHECK: - { id: 0, class: fprb, preferred-register: '' }
+# CHECK: - { id: 1, class: fprb, preferred-register: '' }
+# CHECK: - { id: 2, class: fprb, preferred-register: '' }
+# CHECK: - { id: 3, class: fprb, preferred-register: '' }
+registers:
+  - { id: 0, class: _ }
+  - { id: 1, class: _ }
+  - { id: 2, class: _ }
+  - { id: 3, class: _ }
+body:             |
+  bb.0:
+    liveins: %s0, %s1, %s2
+
+    %0(s32) = COPY %s0
+    %1(s32) = COPY %s1
+    %2(s32) = COPY %s2
+    %3(s32) = G_FMA %0, %1, %2
+    %s0 = COPY %3(s32)
+    BX_RET 14, %noreg, implicit %s0
+...
+---
+name:            test_fma_s64
+# CHECK-LABEL: name: test_fma_s64
+legalized:       true
+regBankSelected: false
+selected:        false
+# CHECK: registers:
+# CHECK: - { id: 0, class: fprb, preferred-register: '' }
+# CHECK: - { id: 1, class: fprb, preferred-register: '' }
+# CHECK: - { id: 2, class: fprb, preferred-register: '' }
+# CHECK: - { id: 3, class: fprb, preferred-register: '' }
+registers:
+  - { id: 0, class: _ }
+  - { id: 1, class: _ }
+  - { id: 2, class: _ }
+  - { id: 3, class: _ }
+body:             |
+  bb.0:
+    liveins: %d0, %d1, %d2
+
+    %0(s64) = COPY %d0
+    %1(s64) = COPY %d1
+    %2(s64) = COPY %d2
+    %3(s64) = G_FMA %0, %1, %2
+    %d0 = COPY %3(s64)
+    BX_RET 14, %noreg, implicit %d0
+...
+---
 name:            test_soft_fp_s64
 # CHECK-LABEL: name: test_soft_fp_s64
 legalized:       true