[SimplifyCFG] Add a test for preserve store alignment, NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@311106 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/SimplifyCFG/preserve-store-alignment.ll b/test/Transforms/SimplifyCFG/preserve-store-alignment.ll
new file mode 100644 (file)
index 0000000..34c9820
--- /dev/null
+++ b/test/Transforms/SimplifyCFG/preserve-store-alignment.ll
@@ -0,0 +1,59 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -simplifycfg -S < %s | FileCheck %s
+
+%struct.Counters = type { i64, i64, i64, [8 x i8] }
+
+@m = global i64 3, align 8
+@counters = global %struct.Counters zeroinitializer, align 16
+
+define i32 @main() local_unnamed_addr {
+; CHECK-LABEL: @main(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[TMP0:%.*]] = load <2 x i64>, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
+; CHECK-NEXT:    [[TMP1:%.*]] = add nsw <2 x i64> [[TMP0]], <i64 1, i64 1>
+; CHECK-NEXT:    store <2 x i64> [[TMP1]], <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
+; CHECK-NEXT:    [[TMP2:%.*]] = load i64, i64* @m, align 8
+; CHECK-NEXT:    [[AND:%.*]] = and i64 [[TMP2]], 1
+; CHECK-NEXT:    [[TOBOOL:%.*]] = icmp eq i64 [[AND]], 0
+; CHECK-NEXT:    [[TMP3:%.*]] = add nsw <2 x i64> [[TMP0]], <i64 2, i64 2>
+; CHECK-NEXT:    [[TMP4:%.*]] = select i1 [[TOBOOL]], <2 x i64> [[TMP1]], <2 x i64> [[TMP3]]
+; CHECK-NEXT:    [[AND4:%.*]] = and i64 [[TMP2]], 2
+; CHECK-NEXT:    [[TOBOOL5:%.*]] = icmp eq i64 [[AND4]], 0
+; CHECK-NEXT:    [[TMP5:%.*]] = add nsw <2 x i64> [[TMP4]], <i64 1, i64 1>
+; CHECK-NEXT:    [[DOT:%.*]] = select i1 [[TOBOOL5]], <2 x i64> [[TMP4]], <2 x i64> [[TMP5]]
+; CHECK-NEXT:    [[TMP6:%.*]] = xor i1 [[TOBOOL]], true
+; CHECK-NEXT:    [[TMP7:%.*]] = xor i1 [[TOBOOL5]], true
+; CHECK-NEXT:    [[TMP8:%.*]] = or i1 [[TMP6]], [[TMP7]]
+; CHECK-NEXT:    br i1 [[TMP8]], label [[TMP9:%.*]], label [[TMP10:%.*]]
+; CHECK:         store <2 x i64> [[DOT]], <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*)
+; CHECK-NEXT:    br label [[TMP10]]
+; CHECK:         ret i32 0
+;
+entry:
+  %0 = load <2 x i64>, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
+  %1 = add nsw <2 x i64> %0, <i64 1, i64 1>
+  store <2 x i64> %1, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
+  %2 = load i64, i64* @m, align 8
+  %and = and i64 %2, 1
+  %tobool = icmp eq i64 %and, 0
+  br i1 %tobool, label %if.end, label %if.then
+
+if.then:                                          ; preds = %entry
+  %3 = add nsw <2 x i64> %0, <i64 2, i64 2>
+  store <2 x i64> %3, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
+  br label %if.end
+
+if.end:                                           ; preds = %entry, %if.then
+  %4 = phi <2 x i64> [ %1, %entry ], [ %3, %if.then ]
+  %and4 = and i64 %2, 2
+  %tobool5 = icmp eq i64 %and4, 0
+  br i1 %tobool5, label %if.end9, label %if.then6
+
+if.then6:                                         ; preds = %if.end
+  %5 = add nsw <2 x i64> %4, <i64 1, i64 1>
+  store <2 x i64> %5, <2 x i64>* bitcast (i64* getelementptr inbounds (%struct.Counters, %struct.Counters* @counters, i64 0, i32 1) to <2 x i64>*), align 8
+  br label %if.end9
+
+if.end9:                                          ; preds = %if.end, %if.then6
+  ret i32 0
+}