diff options
| author | Jonas Paulsson <paulsson@linux.vnet.ibm.com> | 2018-03-19 13:05:22 +0000 |
|---|---|---|
| committer | Jonas Paulsson <paulsson@linux.vnet.ibm.com> | 2018-03-19 13:05:22 +0000 |
| commit | a6216ec4ccb393138d75bd3b12e64e4f91f4a150 (patch) | |
| tree | 321d65ff99a706644621f91c63193c29f416d496 /llvm/test/CodeGen | |
| parent | fcefdb877cf98bf453891bfa8359b98d49e4b055 (diff) | |
| download | bcm5719-llvm-a6216ec4ccb393138d75bd3b12e64e4f91f4a150.tar.gz bcm5719-llvm-a6216ec4ccb393138d75bd3b12e64e4f91f4a150.zip | |
[SystemZ] Bugfix of CC liveness in emitMemMemWrapper (CLC).
If DoneMBB becomes empty it must have CC added to its live-in list, since it
will fall-through into EndMBB. This happens when the CLC loop does the
complete range.
Review: Ulrich Weigand
llvm-svn: 327834
Diffstat (limited to 'llvm/test/CodeGen')
| -rw-r--r-- | llvm/test/CodeGen/SystemZ/memcmp-02.ll | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/SystemZ/memcmp-02.ll b/llvm/test/CodeGen/SystemZ/memcmp-02.ll new file mode 100644 index 00000000000..303e015ec99 --- /dev/null +++ b/llvm/test/CodeGen/SystemZ/memcmp-02.ll @@ -0,0 +1,20 @@ +; Test memcmp using CLC. In this test case the CLC loop will do all the work +; and the DoneMBB becomes empty. It will not pass the mischeduling verifiers +; if DoneMBB does not have CC in its live-in list. + +; RUN: llc < %s -mtriple=s390x-linux-gnu -misched=shuffle | FileCheck %s + +declare i32 @memcmp(i8* nocapture, i8* nocapture, i64) + +define i32 @fun() { +; CHECK-LABEL: fun + %call = call signext i32 @memcmp(i8* nonnull undef, i8* nonnull undef, i64 2048) + %cmp = icmp eq i32 %call, 0 + br i1 %cmp, label %labT, label %labF + +labT: + ret i32 0 + +labF: + ret i32 1 +} |
