Add support for generating reg+reg (indexed) pre-inc loads on PPC.

llvm-svn: 158823

1 files changed, 49 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/PowerPC/lbzux.ll b/llvm/test/CodeGen/PowerPC/lbzux.ll
new file mode 100644
index 00000000000..5725c0dddf5
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/lbzux.ll
@@ -0,0 +1,49 @@
+target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32:64"
+target triple = "powerpc64-unknown-linux-gnu"
+; RUN: llc < %s | FileCheck %s
+
+define fastcc void @allocateSpace() nounwind {
+entry:
+  %0 = load i8** undef, align 8, !tbaa !0
+  br i1 undef, label %return, label %lor.lhs.false
+
+lor.lhs.false:                                    ; preds = %entry
+  br i1 undef, label %if.end7, label %return
+
+if.end7:                                          ; preds = %lor.lhs.false
+  br i1 undef, label %if.then15, label %if.end71
+
+if.then15:                                        ; preds = %if.end7
+  br label %while.cond
+
+while.cond:                                       ; preds = %while.body, %if.then15
+  %idxprom17 = sext i32 0 to i64
+  %arrayidx18 = getelementptr inbounds i8* %0, i64 %idxprom17
+  %or = or i32 undef, undef
+  br i1 false, label %if.end71, label %while.body
+
+while.body:                                       ; preds = %while.cond
+  br i1 undef, label %while.cond, label %if.then45
+
+if.then45:                                        ; preds = %while.body
+  %idxprom48139 = zext i32 %or to i64
+  %arrayidx49 = getelementptr inbounds i8* %0, i64 %idxprom48139
+  %1 = bitcast i8* %arrayidx49 to i16*
+  %2 = bitcast i8* %arrayidx18 to i16*
+  %3 = load i16* %1, align 1
+  store i16 %3, i16* %2, align 1
+  br label %return
+
+if.end71:                                         ; preds = %while.cond, %if.end7
+  unreachable
+
+return:                                           ; preds = %if.then45, %lor.lhs.false, %entry
+  ret void
+
+; CHECK: @allocateSpace
+; CHECK: lbzux
+}
+
+!0 = metadata !{metadata !"any pointer", metadata !1}
+!1 = metadata !{metadata !"omnipotent char", metadata !2}
+!2 = metadata !{metadata !"Simple C/C++ TBAA"}