1 files changed, 87 insertions, 0 deletions
diff --git a/test/CodeGen/PowerPC/memcmp.ll b/test/CodeGen/PowerPC/memcmp.ll
new file mode 100644
index 0000000000000..bae713cb2072c
--- /dev/null
+++ b/test/CodeGen/PowerPC/memcmp.ll
@@ -0,0 +1,87 @@
+; RUN: llc -verify-machineinstrs -mcpu=pwr8 -mtriple=powerpc64le-unknown-gnu-linux  < %s | FileCheck %s -check-prefix=CHECK
+
+; Check size 8
+; Function Attrs: nounwind readonly
+define signext i32 @test1(i32* nocapture readonly %buffer1, i32* nocapture readonly %buffer2) local_unnamed_addr #0 {
+entry:
+  %0 = bitcast i32* %buffer1 to i8*
+  %1 = bitcast i32* %buffer2 to i8*
+  %call = tail call signext i32 @memcmp(i8* %0, i8* %1, i64 8) #2
+  ret i32 %call
+
+; CHECK-LABEL: @test1
+; CHECK: ldbrx [[LOAD1:[0-9]+]]
+; CHECK-NEXT: ldbrx [[LOAD2:[0-9]+]]
+; CHECK-NEXT: li [[LI:[0-9]+]], 1
+; CHECK-NEXT: cmpld [[CMPLD:[0-9]+]], [[LOAD1]], [[LOAD2]]
+; CHECK-NEXT: subf. [[SUB:[0-9]+]], [[LOAD2]], [[LOAD1]]
+; CHECK-NEXT: li [[LI2:[0-9]+]], -1
+; CHECK-NEXT: isel [[ISEL:[0-9]+]], [[LI2]], [[LI]], 4
+; CHECK-NEXT: isel [[ISEL2:[0-9]+]], 0, [[ISEL]], 2
+; CHECK-NEXT: extsw 3, [[ISEL2]]
+; CHECK-NEXT: blr
+}
+
+; Check size 4
+; Function Attrs: nounwind readonly
+define signext i32 @test2(i32* nocapture readonly %buffer1, i32* nocapture readonly %buffer2) local_unnamed_addr #0 {
+entry:
+  %0 = bitcast i32* %buffer1 to i8*
+  %1 = bitcast i32* %buffer2 to i8*
+  %call = tail call signext i32 @memcmp(i8* %0, i8* %1, i64 4) #2
+  ret i32 %call
+
+; CHECK-LABEL: @test2
+; CHECK: lwbrx [[LOAD1:[0-9]+]]
+; CHECK-NEXT: lwbrx [[LOAD2:[0-9]+]]
+; CHECK-NEXT: li [[LI:[0-9]+]], 1
+; CHECK-NEXT: cmpld [[CMPLD:[0-9]+]], [[LOAD1]], [[LOAD2]]
+; CHECK-NEXT: subf. [[SUB:[0-9]+]], [[LOAD2]], [[LOAD1]]
+; CHECK-NEXT: li [[LI2:[0-9]+]], -1
+; CHECK-NEXT: isel [[ISEL:[0-9]+]], [[LI2]], [[LI]], 4
+; CHECK-NEXT: isel [[ISEL2:[0-9]+]], 0, [[ISEL]], 2
+; CHECK-NEXT: extsw 3, [[ISEL2]]
+; CHECK-NEXT: blr
+}
+
+; Check size 2
+; Function Attrs: nounwind readonly
+define signext i32 @test3(i32* nocapture readonly %buffer1, i32* nocapture readonly %buffer2) local_unnamed_addr #0 {
+entry:
+  %0 = bitcast i32* %buffer1 to i8*
+  %1 = bitcast i32* %buffer2 to i8*
+  %call = tail call signext i32 @memcmp(i8* %0, i8* %1, i64 2) #2
+  ret i32 %call
+
+; CHECK-LABEL: @test3
+; CHECK: lhbrx [[LOAD1:[0-9]+]]
+; CHECK-NEXT: lhbrx [[LOAD2:[0-9]+]]
+; CHECK-NEXT: li [[LI:[0-9]+]], 1
+; CHECK-NEXT: cmpld [[CMPLD:[0-9]+]], [[LOAD1]], [[LOAD2]]
+; CHECK-NEXT: subf. [[SUB:[0-9]+]], [[LOAD2]], [[LOAD1]]
+; CHECK-NEXT: li [[LI2:[0-9]+]], -1
+; CHECK-NEXT: isel [[ISEL:[0-9]+]], [[LI2]], [[LI]], 4
+; CHECK-NEXT: isel [[ISEL2:[0-9]+]], 0, [[ISEL]], 2
+; CHECK-NEXT: extsw 3, [[ISEL2]]
+; CHECK-NEXT: blr
+}
+
+; Check size 1
+; Function Attrs: nounwind readonly
+define signext i32 @test4(i32* nocapture readonly %buffer1, i32* nocapture readonly %buffer2) local_unnamed_addr #0 {
+entry:
+  %0 = bitcast i32* %buffer1 to i8*
+  %1 = bitcast i32* %buffer2 to i8*
+  %call = tail call signext i32 @memcmp(i8* %0, i8* %1, i64 1) #2
+  ret i32 %call
+
+; CHECK-LABEL: @test4
+; CHECK: lbz [[LOAD1:[0-9]+]]
+; CHECK-NEXT: lbz [[LOAD2:[0-9]+]]
+; CHECK-NEXT: subf [[SUB:[0-9]+]], [[LOAD2]], [[LOAD1]]
+; CHECK-NEXT: extsw 3, [[SUB]]
+; CHECK-NEXT: blr
+}
+
+; Function Attrs: nounwind readonly
+declare signext i32 @memcmp(i8*, i8*, i64) #1