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authorTom Stellard <tstellar@redhat.com>2018-04-09 23:19:44 +0000
committerTom Stellard <tstellar@redhat.com>2018-04-09 23:19:44 +0000
commit9fa366d3c110cb81b8f21deba17f92cdbc86702c (patch)
tree67878ce3eefb51a35b0c7e5fdbd41c77a5217a29 /test/CodeGen/PowerPC
parent7e48926daec357789a2ffc27c44a4ed4d789eab8 (diff)
Merging r327651:
------------------------------------------------------------------------ r327651 | carrot | 2018-03-15 10:49:12 -0700 (Thu, 15 Mar 2018) | 9 lines [PPC] Avoid non-simple MVT in STBRX optimization PR35402 triggered this case. It bswap and stores a 48bit value, current STBRX optimization transforms it into STBRX. Unfortunately 48bit is not a simple MVT, there is no PPC instruction to support it, and it can't be automatically expanded by llvm, so caused a crash. This patch detects the non-simple MVT and returns early. Differential Revision: https://reviews.llvm.org/D44500 ------------------------------------------------------------------------ git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_60@329641 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/PowerPC')
-rw-r--r--test/CodeGen/PowerPC/pr35402.ll18
1 files changed, 18 insertions, 0 deletions
diff --git a/test/CodeGen/PowerPC/pr35402.ll b/test/CodeGen/PowerPC/pr35402.ll
new file mode 100644
index 00000000000..06e6d963b13
--- /dev/null
+++ b/test/CodeGen/PowerPC/pr35402.ll
@@ -0,0 +1,18 @@
+; RUN: llc -O2 < %s | FileCheck %s
+target triple = "powerpc64le-linux-gnu"
+
+define void @test(i8* %p, i64 %data) {
+entry:
+ %0 = tail call i64 @llvm.bswap.i64(i64 %data)
+ %ptr = bitcast i8* %p to i48*
+ %val = trunc i64 %0 to i48
+ store i48 %val, i48* %ptr, align 1
+ ret void
+
+; CHECK: sth
+; CHECK: stw
+; CHECK-NOT: stdbrx
+
+}
+
+declare i64 @llvm.bswap.i64(i64)