[GlobalISel][AArch64] Add back constant select tests. NFC.

More of r297856.

llvm-svn: 297859

llvm/test/CodeGen/AArch64/GlobalISel/select-constant.mir

@@ -0,0 +1,73 @@
+# RUN: llc -mtriple=aarch64-- -run-pass=instruction-select -verify-machineinstrs -global-isel %s -o - | FileCheck %s
+
+--- |
+  target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
+
+  define i32 @const_s32() { ret i32 42 }
+  define i64 @const_s64() { ret i64 1234567890123 }
+
+  define i32 @fconst_s32() { ret i32 42 }
+  define i64 @fconst_s64() { ret i64 1234567890123 }
+...
+
+---
+# CHECK-LABEL: name: const_s32
+name:            const_s32
+legalized:       true
+regBankSelected: true
+registers:
+  - { id: 0, class: gpr }
+
+# CHECK:  body:
+# CHECK: %0 = MOVi32imm 42
+body:             |
+  bb.0:
+    %0(s32) = G_CONSTANT i32 42
+...
+
+---
+# CHECK-LABEL: name: const_s64
+name:            const_s64
+legalized:       true
+regBankSelected: true
+registers:
+  - { id: 0, class: gpr }
+
+# CHECK:  body:
+# CHECK: %0 = MOVi64imm 1234567890123
+body:             |
+  bb.0:
+    %0(s64) = G_CONSTANT i64 1234567890123
+...
+
+---
+# CHECK-LABEL: name: fconst_s32
+name:            fconst_s32
+legalized:       true
+regBankSelected: true
+registers:
+  - { id: 0, class: fpr }
+
+# CHECK:  body:
+# CHECK: [[TMP:%[0-9]+]] = MOVi32imm 1080033280
+# CHECK: %0 = COPY [[TMP]]
+body:             |
+  bb.0:
+    %0(s32) = G_FCONSTANT float 3.5
+...
+
+---
+# CHECK-LABEL: name: fconst_s64
+name:            fconst_s64
+legalized:       true
+regBankSelected: true
+registers:
+  - { id: 0, class: fpr }
+
+# CHECK:  body:
+# CHECK: [[TMP:%[0-9]+]] = MOVi64imm 4607182418800017408
+# CHECK: %0 = COPY [[TMP]]
+body:             |
+  bb.0:
+    %0(s64) = G_FCONSTANT double 1.0
+...