[NFC] Add new test to cover the lhs scheduling issue for P9.

llvm-svn: 349443

1 files changed, 49 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/PowerPC/mi-scheduling-lhs.ll b/llvm/test/CodeGen/PowerPC/mi-scheduling-lhs.ll
new file mode 100644
index 00000000000..4de384dce6e
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/mi-scheduling-lhs.ll
@@ -0,0 +1,49 @@
+; RUN: llc -relocation-model=pic -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -mcpu=pwr9 <%s | FileCheck %s
+
+%struct.Record = type { %struct.Record*, i32 }
+
+@n = local_unnamed_addr global i32 500000000, align 4
+@m = common global %struct.Record zeroinitializer, align 8
+@a = hidden local_unnamed_addr global %struct.Record* @m, align 8
+@o = common global %struct.Record zeroinitializer, align 8
+@b = hidden local_unnamed_addr global %struct.Record* @o, align 8
+
+define signext i32 @foo() local_unnamed_addr {
+entry:
+  %0 = load i64, i64* bitcast (%struct.Record** @b to i64*), align 8
+  %1 = load i64*, i64** bitcast (%struct.Record** @a to i64**), align 8
+  store i64 %0, i64* %1, align 8
+  %2 = load i32, i32* @n, align 4
+  %cmp9 = icmp eq i32 %2, 0
+  br i1 %cmp9, label %for.end, label %for.body
+
+for.body:                                         ; preds = %entry, %for.body
+  %i.010 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
+  %3 = load %struct.Record*, %struct.Record** @a, align 8
+  %IntComp = getelementptr inbounds %struct.Record, %struct.Record* %3, i64 0, i32 1
+  store i32 5, i32* %IntComp, align 8
+  %PtrComp2 = getelementptr inbounds %struct.Record, %struct.Record* %3, i64 0, i32 0
+  %4 = load %struct.Record*, %struct.Record** %PtrComp2, align 8
+  %IntComp3 = getelementptr inbounds %struct.Record, %struct.Record* %4, i64 0, i32 1
+  store i32 5, i32* %IntComp3, align 8
+  %PtrComp6 = getelementptr inbounds %struct.Record, %struct.Record* %4, i64 0, i32 0
+  store %struct.Record* %4, %struct.Record** %PtrComp6, align 8
+  %inc = add nuw i32 %i.010, 1
+  %cmp = icmp ult i32 %inc, %2
+  br i1 %cmp, label %for.body, label %for.end
+
+for.end:                                          ; preds = %for.body, %entry
+  ret i32 0
+
+; CHECK-LABEL: foo
+; CHECK: addis [[REG1:[0-9]+]], 2, a@toc@ha
+; CHECK: li [[REG4:[0-9]+]], 5
+; CHECK: [[LAB:[a-z0-9A-Z_.]+]]:
+; CHECK: ld [[REG2:[0-9]+]], a@toc@l([[REG1]])
+; CHECK: ld [[REG3:[0-9]+]], 0([[REG2]])
+; CHECK: stw [[REG4]], 8([[REG2]])
+; CHECK: stw [[REG4]], 8([[REG3]]) 
+; CHECK: std [[REG3]], 0([[REG3]])
+; CHECK: bdnz [[LAB]]
+}
+