[InstCombine] regenerate test checks, add comments; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@310598 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/memcpy.ll b/test/Transforms/InstCombine/memcpy.ll
index f66e14c..8cf640a 100644 (file)
--- a/test/Transforms/InstCombine/memcpy.ll
+++ b/test/Transforms/InstCombine/memcpy.ll
@@ -3,25 +3,35 @@
 declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
 declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
 
+; Same src/dest.
+
 define void @test1(i8* %a) {
-        tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i32 1, i1 false)
-        ret void
-; CHECK-LABEL: define void @test1(
-; CHECK-NEXT: ret void
+; CHECK-LABEL: @test1(
+; CHECK-NEXT:    ret void
+;
+  tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i32 1, i1 false)
+  ret void
 }
 
+; PR8267 - same src/dest, but volatile.
 
-; PR8267
 define void @test2(i8* %a) {
-        tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i32 1, i1 true)
-        ret void
-; CHECK-LABEL: define void @test2(
-; CHECK-NEXT: call void @llvm.memcpy
+; CHECK-LABEL: @test2(
+; CHECK-NEXT:    tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i32 1, i1 true)
+; CHECK-NEXT:    ret void
+;
+  tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i32 1, i1 true)
+  ret void
 }
 
+; 17179869184 == 0x400000000 - make sure that doesn't get truncated to 32-bit.
+
 define void @test3(i8* %d, i8* %s) {
-        tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %d, i8* %s, i64 17179869184, i32 4, i1 false)
-        ret void
-; CHECK-LABEL: define void @test3(
-; CHECK-NEXT: call void @llvm.memcpy
+; CHECK-LABEL: @test3(
+; CHECK-NEXT:    tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %d, i8* %s, i64 17179869184, i32 4, i1 false)
+; CHECK-NEXT:    ret void
+;
+  tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %d, i8* %s, i64 17179869184, i32 4, i1 false)
+  ret void
 }
+