Add missing case to switch statement - DAGTypeLegalizer::ExpandIntegerResult

should expand ATOMIC_CMP_SWAP nodes the same way that it does for ATOMIC_SWAP.

Since ATOMIC_LOADs on some targets (e.g. older ARM variants) get legalized to
ATOMIC_CMP_SWAPs, the missing case had been causing i64 atomic loads to crash
during isel.

<rdar://problem/14074644>

llvm-svn: 185186

1 files changed, 15 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/ARM/atomic-load-store.ll b/llvm/test/CodeGen/ARM/atomic-load-store.ll
index 12a8fe4cd88..66916a7c2e2 100644
--- a/llvm/test/CodeGen/ARM/atomic-load-store.ll
+++ b/llvm/test/CodeGen/ARM/atomic-load-store.ll
@@ -2,6 +2,7 @@
 ; RUN: llc < %s -mtriple=armv7-apple-ios -O0 | FileCheck %s -check-prefix=ARM
 ; RUN: llc < %s -mtriple=thumbv7-apple-ios | FileCheck %s -check-prefix=THUMBTWO
 ; RUN: llc < %s -mtriple=thumbv6-apple-ios | FileCheck %s -check-prefix=THUMBONE
+; RUN  llc < %s -mtriple=armv4-apple-ios | FileCheck %s -check-prefix=ARMV4
 
 define void @test1(i32* %ptr, i32 %val1) {
 ; ARM: test1
@@ -54,3 +55,17 @@ define void @test4(i8* %ptr1, i8* %ptr2) {
   store atomic i8 %val, i8* %ptr2 seq_cst, align 1
   ret void
 }
+
+define i64 @test_old_load_64bit(i64* %p) {
+; ARMV4: test_old_load_64bit
+; ARMV4: ___sync_val_compare_and_swap_8
+  %1 = load atomic i64* %p seq_cst, align 8
+  ret i64 %1
+}
+
+define void @test_old_store_64bit(i64* %p, i64 %v) {
+; ARMV4: test_old_store_64bit
+; ARMV4: ___sync_lock_test_and_set_8
+  store atomic i64 %v, i64* %p seq_cst, align 8
+  ret void
+}