[Sparc] Fix "Cannot select" error for AtomicFence on 32-bit V9

Summary:
This also adds testing of 32-bit V9 atomic lowering, splitting the
64-bit-only tests out into their own file.

Reviewers: venkatra, jyknight

Reviewed By: jyknight

Subscribers: hiraditya, fedor.sergeev, jfb, llvm-commits, glaubitz

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D69352

2 files changed, 61 insertions, 59 deletions

diff --git a/llvm/test/CodeGen/SPARC/64atomics.ll b/llvm/test/CodeGen/SPARC/64atomics.ll
new file mode 100644
index 00000000000..89175b6242e
--- /dev/null
+++ b/llvm/test/CodeGen/SPARC/64atomics.ll
@@ -0,0 +1,60 @@
+; RUN: llc < %s -march=sparcv9 -verify-machineinstrs | FileCheck %s
+
+; CHECK-LABEL: test_atomic_i64
+; CHECK:       ldx [%o0]
+; CHECK:       membar
+; CHECK:       ldx [%o1]
+; CHECK:       membar
+; CHECK:       membar
+; CHECK:       stx {{.+}}, [%o2]
+define i64 @test_atomic_i64(i64* %ptr1, i64* %ptr2, i64* %ptr3) {
+entry:
+  %0 = load atomic i64, i64* %ptr1 acquire, align 8
+  %1 = load atomic i64, i64* %ptr2 acquire, align 8
+  %2 = add i64 %0, %1
+  store atomic i64 %2, i64* %ptr3 release, align 8
+  ret i64 %2
+}
+
+; CHECK-LABEL: test_cmpxchg_i64
+; CHECK:       mov 123, [[R:%[gilo][0-7]]]
+; CHECK:       casx [%o1], %o0, [[R]]
+
+define i64 @test_cmpxchg_i64(i64 %a, i64* %ptr) {
+entry:
+  %pair = cmpxchg i64* %ptr, i64 %a, i64 123 monotonic monotonic
+  %b = extractvalue { i64, i1 } %pair, 0
+  ret i64 %b
+}
+
+; CHECK-LABEL: test_swap_i64
+; CHECK:       casx [%o1],
+
+define i64 @test_swap_i64(i64 %a, i64* %ptr) {
+entry:
+  %b = atomicrmw xchg i64* %ptr, i64 42 monotonic
+  ret i64 %b
+}
+
+; CHECK-LABEL: test_load_sub_64
+; CHECK: membar
+; CHECK: sub
+; CHECK: casx [%o0]
+; CHECK: membar
+define zeroext i64 @test_load_sub_64(i64* %p, i64 zeroext %v) {
+entry:
+  %0 = atomicrmw sub i64* %p, i64 %v seq_cst
+  ret i64 %0
+}
+
+; CHECK-LABEL: test_load_max_64
+; CHECK: membar
+; CHECK: cmp
+; CHECK: movg %xcc
+; CHECK: casx [%o0]
+; CHECK: membar
+define zeroext i64 @test_load_max_64(i64* %p, i64 zeroext %v) {
+entry:
+  %0 = atomicrmw max i64* %p, i64 %v seq_cst
+  ret i64 %0
+}
diff --git a/llvm/test/CodeGen/SPARC/atomics.ll b/llvm/test/CodeGen/SPARC/atomics.ll
index 17aa227ec9a..c6ecbaf911d 100644
--- a/llvm/test/CodeGen/SPARC/atomics.ll
+++ b/llvm/test/CodeGen/SPARC/atomics.ll
@@ -1,3 +1,4 @@
+; RUN: llc < %s -march=sparc -mcpu=v9 -verify-machineinstrs | FileCheck %s
 ; RUN: llc < %s -march=sparcv9 -verify-machineinstrs | FileCheck %s
 
 ; CHECK-LABEL: test_atomic_i8
@@ -48,22 +49,6 @@ entry:
   ret i32 %2
 }
 
-; CHECK-LABEL: test_atomic_i64
-; CHECK:       ldx [%o0]
-; CHECK:       membar
-; CHECK:       ldx [%o1]
-; CHECK:       membar
-; CHECK:       membar
-; CHECK:       stx {{.+}}, [%o2]
-define i64 @test_atomic_i64(i64* %ptr1, i64* %ptr2, i64* %ptr3) {
-entry:
-  %0 = load atomic i64, i64* %ptr1 acquire, align 8
-  %1 = load atomic i64, i64* %ptr2 acquire, align 8
-  %2 = add i64 %0, %1
-  store atomic i64 %2, i64* %ptr3 release, align 8
-  ret i64 %2
-}
-
 ;; TODO: the "move %icc" and related instructions are totally
 ;; redundant here. There's something weird happening in optimization
 ;; of the success value of cmpxchg.
@@ -159,17 +144,6 @@ entry:
   ret i32 %b
 }
 
-; CHECK-LABEL: test_cmpxchg_i64
-; CHECK:       mov 123, [[R:%[gilo][0-7]]]
-; CHECK:       casx [%o1], %o0, [[R]]
-
-define i64 @test_cmpxchg_i64(i64 %a, i64* %ptr) {
-entry:
-  %pair = cmpxchg i64* %ptr, i64 %a, i64 123 monotonic monotonic
-  %b = extractvalue { i64, i1 } %pair, 0
-  ret i64 %b
-}
-
 ; CHECK-LABEL: test_swap_i8
 ; CHECK:       mov 42, [[R:%[gilo][0-7]]]
 ; CHECK:       cas
@@ -200,15 +174,6 @@ entry:
   ret i32 %b
 }
 
-; CHECK-LABEL: test_swap_i64
-; CHECK:       casx [%o1],
-
-define i64 @test_swap_i64(i64 %a, i64* %ptr) {
-entry:
-  %b = atomicrmw xchg i64* %ptr, i64 42 monotonic
-  ret i64 %b
-}
-
 ; CHECK-LABEL: test_load_sub_i8
 ; CHECK: membar
 ; CHECK: .L{{.*}}:
@@ -246,17 +211,6 @@ entry:
   ret i32 %0
 }
 
-; CHECK-LABEL: test_load_sub_64
-; CHECK: membar
-; CHECK: sub
-; CHECK: casx [%o0]
-; CHECK: membar
-define zeroext i64 @test_load_sub_64(i64* %p, i64 zeroext %v) {
-entry:
-  %0 = atomicrmw sub i64* %p, i64 %v seq_cst
-  ret i64 %0
-}
-
 ; CHECK-LABEL: test_load_xor_32
 ; CHECK: membar
 ; CHECK: xor
@@ -292,18 +246,6 @@ entry:
   ret i32 %0
 }
 
-; CHECK-LABEL: test_load_max_64
-; CHECK: membar
-; CHECK: cmp
-; CHECK: movg %xcc
-; CHECK: casx [%o0]
-; CHECK: membar
-define zeroext i64 @test_load_max_64(i64* %p, i64 zeroext %v) {
-entry:
-  %0 = atomicrmw max i64* %p, i64 %v seq_cst
-  ret i64 %0
-}
-
 ; CHECK-LABEL: test_load_umin_32
 ; CHECK: membar
 ; CHECK: cmp