1 files changed, 121 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/hoist-spill.ll b/llvm/test/CodeGen/X86/hoist-spill.ll
new file mode 100644
index 00000000000..db9c4105a02
--- /dev/null
+++ b/llvm/test/CodeGen/X86/hoist-spill.ll
@@ -0,0 +1,121 @@
+; RUN: llc < %s | FileCheck %s
+
+; grep 'Spill' |sed 's%.*\(-[0-9]\+(\%rsp)\).*%\1%g' |sort |uniq -d |awk '{if (/rsp/); exit -1}'
+; Check no spills to the same stack slot after hoisting.
+; CHECK: mov{{.}} %{{.*}}, [[SPOFFSET1:-?[0-9]*]](%rsp)
+; CHECK: mov{{.}} %{{.*}}, [[SPOFFSET2:-?[0-9]*]](%rsp)
+; CHECK: mov{{.}} %{{.*}}, [[SPOFFSET3:-?[0-9]*]](%rsp)
+; CHECK-NOT: mov{{.}} %{{.*}}, [[SPOFFSET1]](%rsp)
+; CHECK-NOT: mov{{.}} %{{.*}}, [[SPOFFSET2]](%rsp)
+; CHECK-NOT: mov{{.}} %{{.*}}, [[SPOFFSET3]](%rsp)
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+@a = external global i32*, align 8
+@b = external global i32, align 4
+@d = external global i32*, align 8
+
+; Function Attrs: norecurse noreturn nounwind uwtable
+define void @fn1(i32 %p1) {
+entry:
+  %tmp = load i32*, i32** @d, align 8
+  %tmp1 = load i32*, i32** @a, align 8
+  %tmp2 = sext i32 %p1 to i64
+  br label %for.cond
+
+for.cond:                                         ; preds = %for.inc14, %entry
+  %indvar = phi i32 [ %indvar.next, %for.inc14 ], [ 0, %entry ]
+  %indvars.iv30.in = phi i32 [ %indvars.iv30, %for.inc14 ], [ %p1, %entry ]
+  %c.0 = phi i32 [ %inc15, %for.inc14 ], [ 1, %entry ]
+  %k.0 = phi i32 [ %k.1.lcssa, %for.inc14 ], [ undef, %entry ]
+  %tmp3 = icmp sgt i32 undef, 0
+  %smax52 = select i1 %tmp3, i32 undef, i32 0
+  %tmp4 = zext i32 %smax52 to i64
+  %tmp5 = icmp sgt i64 undef, %tmp4
+  %smax53 = select i1 %tmp5, i64 undef, i64 %tmp4
+  %tmp6 = add nsw i64 %smax53, 1
+  %tmp7 = sub nsw i64 %tmp6, %tmp4
+  %tmp8 = add nsw i64 %tmp7, -8
+  %tmp9 = sub i32 undef, %indvar
+  %tmp10 = icmp sgt i64 %tmp2, 0
+  %smax40 = select i1 %tmp10, i64 %tmp2, i64 0
+  %scevgep41 = getelementptr i32, i32* %tmp1, i64 %smax40
+  %indvars.iv30 = add i32 %indvars.iv30.in, -1
+  %tmp11 = icmp sgt i32 %indvars.iv30, 0
+  %smax = select i1 %tmp11, i32 %indvars.iv30, i32 0
+  %tmp12 = zext i32 %smax to i64
+  %sub = sub nsw i32 %p1, %c.0
+  %cmp = icmp sgt i32 %sub, 0
+  %sub. = select i1 %cmp, i32 %sub, i32 0
+  %cmp326 = icmp sgt i32 %k.0, %p1
+  br i1 %cmp326, label %for.cond4.preheader, label %for.body.preheader
+
+for.body.preheader:                               ; preds = %for.cond
+  br label %for.body
+
+for.cond4.preheader:                              ; preds = %for.body, %for.cond
+  %k.1.lcssa = phi i32 [ %k.0, %for.cond ], [ %add, %for.body ]
+  %cmp528 = icmp sgt i32 %sub., %p1
+  br i1 %cmp528, label %for.inc14, label %for.body6.preheader
+
+for.body6.preheader:                              ; preds = %for.cond4.preheader
+  br i1 undef, label %for.body6, label %min.iters.checked
+
+min.iters.checked:                                ; preds = %for.body6.preheader
+  br i1 undef, label %for.body6, label %vector.memcheck
+
+vector.memcheck:                                  ; preds = %min.iters.checked
+  %bound1 = icmp ule i32* undef, %scevgep41
+  %memcheck.conflict = and i1 undef, %bound1
+  br i1 %memcheck.conflict, label %for.body6, label %vector.body.preheader
+
+vector.body.preheader:                            ; preds = %vector.memcheck
+  %lcmp.mod = icmp eq i64 undef, 0
+  br i1 %lcmp.mod, label %vector.body.preheader.split, label %vector.body.prol
+
+vector.body.prol:                                 ; preds = %vector.body.prol, %vector.body.preheader
+  %prol.iter.cmp = icmp eq i64 undef, 0
+  br i1 %prol.iter.cmp, label %vector.body.preheader.split, label %vector.body.prol
+
+vector.body.preheader.split:                      ; preds = %vector.body.prol, %vector.body.preheader
+  %tmp13 = icmp ult i64 %tmp8, 24
+  br i1 %tmp13, label %middle.block, label %vector.body
+
+vector.body:                                      ; preds = %vector.body, %vector.body.preheader.split
+  %index = phi i64 [ %index.next.3, %vector.body ], [ 0, %vector.body.preheader.split ]
+  %index.next = add i64 %index, 8
+  %offset.idx.1 = add i64 %tmp12, %index.next
+  %tmp14 = getelementptr inbounds i32, i32* %tmp, i64 %offset.idx.1
+  %tmp15 = bitcast i32* %tmp14 to <4 x i32>*
+  %wide.load.1 = load <4 x i32>, <4 x i32>* %tmp15, align 4
+  %tmp16 = getelementptr inbounds i32, i32* %tmp1, i64 %offset.idx.1
+  %tmp17 = bitcast i32* %tmp16 to <4 x i32>*
+  store <4 x i32> %wide.load.1, <4 x i32>* %tmp17, align 4
+  %index.next.3 = add i64 %index, 32
+  br i1 undef, label %middle.block, label %vector.body
+
+middle.block:                                     ; preds = %vector.body, %vector.body.preheader.split
+  br i1 undef, label %for.inc14, label %for.body6
+
+for.body:                                         ; preds = %for.body, %for.body.preheader
+  %k.127 = phi i32 [ %k.0, %for.body.preheader ], [ %add, %for.body ]
+  %add = add nsw i32 %k.127, 1
+  %tmp18 = load i32, i32* undef, align 4
+  store i32 %tmp18, i32* @b, align 4
+  br i1 undef, label %for.body, label %for.cond4.preheader
+
+for.body6:                                        ; preds = %for.body6, %middle.block, %vector.memcheck, %min.iters.checked, %for.body6.preheader
+  %indvars.iv32 = phi i64 [ undef, %for.body6 ], [ %tmp12, %vector.memcheck ], [ %tmp12, %min.iters.checked ], [ %tmp12, %for.body6.preheader ], [ undef, %middle.block ]
+  %arrayidx8 = getelementptr inbounds i32, i32* %tmp, i64 %indvars.iv32
+  %tmp19 = load i32, i32* %arrayidx8, align 4
+  %arrayidx10 = getelementptr inbounds i32, i32* %tmp1, i64 %indvars.iv32
+  store i32 %tmp19, i32* %arrayidx10, align 4
+  %cmp5 = icmp slt i64 %indvars.iv32, undef
+  br i1 %cmp5, label %for.body6, label %for.inc14
+
+for.inc14:                                        ; preds = %for.body6, %middle.block, %for.cond4.preheader
+  %inc15 = add nuw nsw i32 %c.0, 1
+  %indvar.next = add i32 %indvar, 1
+  br label %for.cond
+}