Revert "Reland "r364412 [ExpandMemCmp][MergeICmps] Move passes out of CodeGen into opt pipeline.""

This reverts commit r371502, it broke tests
(clang/test/CodeGenCXX/auto-var-init.cpp).

llvm-svn: 371507

1 files changed, 44 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/AArch64/bcmp-inline-small.ll b/llvm/test/CodeGen/AArch64/bcmp-inline-small.ll
new file mode 100644
index 00000000000..da42b1d6863
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/bcmp-inline-small.ll
@@ -0,0 +1,44 @@
+; RUN: llc -O2 < %s -mtriple=aarch64-linux-gnu                     | FileCheck %s --check-prefixes=CHECK,CHECKN
+; RUN: llc -O2 < %s -mtriple=aarch64-linux-gnu -mattr=strict-align | FileCheck %s --check-prefixes=CHECK,CHECKS
+
+declare i32 @bcmp(i8*, i8*, i64) nounwind readonly
+declare i32 @memcmp(i8*, i8*, i64) nounwind readonly
+
+define i1 @bcmp_b2(i8* %s1, i8* %s2) {
+entry:
+  %bcmp = call i32 @bcmp(i8* %s1, i8* %s2, i64 15)
+  %ret = icmp eq i32 %bcmp, 0
+  ret i1 %ret
+
+; CHECK-LABEL: bcmp_b2:
+; CHECK-NOT:   bl bcmp
+; CHECKN:      ldr  x
+; CHECKN-NEXT: ldr  x
+; CHECKN-NEXT: ldur x
+; CHECKN-NEXT: ldur x
+; CHECKS:      ldr  x
+; CHECKS-NEXT: ldr  x
+; CHECKS-NEXT: ldr  w
+; CHECKS-NEXT: ldr  w
+; CHECKS-NEXT: ldrh w
+; CHECKS-NEXT: ldrh w
+; CHECKS-NEXT: ldrb w
+; CHECKS-NEXT: ldrb w
+}
+
+define i1 @bcmp_bs(i8* %s1, i8* %s2) optsize {
+entry:
+  %memcmp = call i32 @memcmp(i8* %s1, i8* %s2, i64 31)
+  %ret = icmp eq i32 %memcmp, 0
+  ret i1 %ret
+
+; CHECK-LABEL: bcmp_bs:
+; CHECKN-NOT:  bl memcmp
+; CHECKN:      ldp  x
+; CHECKN-NEXT: ldp  x
+; CHECKN-NEXT: ldr  x
+; CHECKN-NEXT: ldr  x
+; CHECKN-NEXT: ldur x
+; CHECKN-NEXT: ldur x
+; CHECKS:      bl memcmp
+}