1 ; RUN: llc -verify-machineinstrs -ppc-reduce-cr-logicals \
2 ; RUN: -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s
4 ; Test case is reduced from the snappy benchmark.
5 ; Verify MachineLICM will always hoist trivially rematerializable instructions even when register pressure is high.
7 %"class.snappy::SnappyDecompressor" = type <{ ptr, ptr, ptr, i32, i8, [5 x i8], [6 x i8] }>
8 %"class.snappy::Source" = type { ptr }
9 %"struct.snappy::iovec" = type { ptr, i64 }
10 %"class.snappy::SnappyIOVecWriter" = type { ptr, i64, i64, i64, i64, i64 }
12 @_ZN6snappy8internalL10char_tableE = internal unnamed_addr constant [5 x i16] [i16 1, i16 2052, i16 4097, i16 8193, i16 2], align 2
13 @_ZN6snappy8internalL8wordmaskE = internal unnamed_addr constant [5 x i32] [i32 0, i32 255, i32 65535, i32 16777215, i32 -1], align 4
15 ; Function Attrs: argmemonly nounwind
16 declare void @llvm.memmove.p0.p0.i64(ptr nocapture, ptr nocapture readonly, i64, i1) #2
17 ; Function Attrs: argmemonly nounwind
18 declare void @llvm.memcpy.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1) #2
20 define linkonce_odr void @ZN6snappyDecompressor_(ptr %this, ptr %writer) {
21 ; CHECK-LABEL: ZN6snappyDecompressor_:
22 ; CHECK: # %bb.0: # %entry
23 ; CHECK: addis 4, 2, .L__ModuleStringPool@toc@ha
24 ; CHECK: addi 25, 4, .L__ModuleStringPool@toc@l
25 ; CHECK: .LBB0_2: # %for.cond
26 ; CHECK-NOT: addis {{[0-9]+}}, 2, .L__ModuleStringPool@toc@ha
29 %ip_limit_ = getelementptr inbounds %"class.snappy::SnappyDecompressor", ptr %this, i64 0, i32 2
30 %curr_iov_index_.i = getelementptr inbounds %"class.snappy::SnappyIOVecWriter", ptr %writer, i64 0, i32 2
31 %curr_iov_written_.i = getelementptr inbounds %"class.snappy::SnappyIOVecWriter", ptr %writer, i64 0, i32 3
34 for.cond: ; preds = %if.end82, %if.then56, %if.end49, %entry
35 %ip.0 = phi ptr [ null, %entry ], [ %add.ptr50, %if.end49 ], [ null, %if.then56 ], [ undef, %if.end82 ]
36 %incdec.ptr = getelementptr inbounds i8, ptr %ip.0, i64 1
37 %0 = load i8, ptr %ip.0, align 1
38 %conv = zext i8 %0 to i32
39 br i1 undef, label %if.then7, label %if.else
41 if.then7: ; preds = %for.cond
42 %1 = lshr i32 %conv, 2
43 %add = add nuw nsw i32 %1, 1
44 %conv9 = zext i32 %add to i64
45 %2 = load i64, ptr %ip_limit_, align 8
46 %sub.ptr.sub13 = sub i64 %2, 0
47 %3 = load i64, ptr undef, align 8
48 %4 = load i64, ptr null, align 8
49 %sub.i = sub i64 %3, %4
50 %cmp.i = icmp ult i32 %add, 17
51 %cmp2.i = icmp ugt i64 %sub.ptr.sub13, 20
52 %or.cond.i = and i1 %cmp.i, %cmp2.i
53 %cmp4.i = icmp ugt i64 %sub.i, 15
54 %or.cond13.i = and i1 %or.cond.i, %cmp4.i
55 br i1 %or.cond13.i, label %land.lhs.true5.i, label %if.end17
57 land.lhs.true5.i: ; preds = %if.then7
58 %5 = load ptr, ptr undef, align 8
59 %6 = load i64, ptr %curr_iov_index_.i, align 8
60 %7 = load i64, ptr %curr_iov_written_.i, align 8
61 %sub6.i = sub i64 0, %7
62 %cmp7.i = icmp ugt i64 %sub6.i, 15
63 br i1 %cmp7.i, label %cleanup102, label %if.end17
65 if.end17: ; preds = %land.lhs.true5.i, %if.then7
66 %sub = add nsw i64 %conv9, -60
67 %8 = load i32, ptr undef, align 4
68 %arrayidx = getelementptr inbounds [5 x i32], ptr @_ZN6snappy8internalL8wordmaskE, i64 0, i64 %sub
69 %9 = load i32, ptr %arrayidx, align 4
70 %and21 = and i32 %9, %8
71 %add22 = add i32 %and21, 1
72 %conv23 = zext i32 %add22 to i64
73 %add.ptr24 = getelementptr inbounds i8, ptr %incdec.ptr, i64 %sub
76 if.end25: ; preds = %if.end17
77 %sub.ptr.rhs.cast28 = ptrtoint ptr %add.ptr24 to i64
78 %cmp30233 = icmp ugt i64 %conv23, 0
79 br i1 %cmp30233, label %while.body.preheader, label %while.end
81 while.body.preheader: ; preds = %if.end25
82 %add.i158256 = add i64 %4, 0
83 %cmp.i160257 = icmp ugt i64 %add.i158256, %3
84 br i1 %cmp.i160257, label %cleanup105, label %while.cond.preheader.i
86 while.cond.preheader.i: ; preds = %while.body.preheader
87 %call39 = call ptr undef(ptr undef, ptr nonnull undef)
90 while.end: ; preds = %if.end25
91 br label %while.cond.preheader.i176
93 while.cond.preheader.i176: ; preds = %while.end
94 br i1 undef, label %if.end49, label %while.body.lr.ph.i182
96 while.body.lr.ph.i182: ; preds = %while.cond.preheader.i176
97 %.pre.i181 = load i64, ptr %curr_iov_written_.i, align 8
98 %10 = load ptr, ptr undef, align 8
99 %11 = load i64, ptr %curr_iov_index_.i, align 8
100 %iov_len.i185 = getelementptr inbounds %"struct.snappy::iovec", ptr %10, i64 %11, i32 1
101 %12 = load i64, ptr %iov_len.i185, align 8
102 br label %cond.end.i190
104 cond.end.i190: ; preds = %while.body.lr.ph.i182
105 br i1 undef, label %if.end18.i207, label %if.then10.i193
107 if.then10.i193: ; preds = %cond.end.i190
108 %add12.i191 = add i64 %11, 1
109 %iov_len22.phi.trans.insert.i194 = getelementptr inbounds %"struct.snappy::iovec", ptr %10, i64 %add12.i191, i32 1
110 %.pre48.i195 = load i64, ptr %iov_len22.phi.trans.insert.i194, align 8
111 br label %if.end18.i207
113 if.end18.i207: ; preds = %if.then10.i193, %cond.end.i190
114 %13 = phi i64 [ %.pre.i181, %cond.end.i190 ], [ 0, %if.then10.i193 ]
115 %14 = phi i64 [ %12, %cond.end.i190 ], [ %.pre48.i195, %if.then10.i193 ]
116 %15 = phi i64 [ %11, %cond.end.i190 ], [ %add12.i191, %if.then10.i193 ]
117 %sub.i197 = sub i64 %14, %13
118 %cmp.i.i198 = icmp ult i64 %sub.i197, %conv23
119 %.sroa.speculated.i199 = select i1 %cmp.i.i198, i64 %sub.i197, i64 %conv23
120 %iov_base.i.i200 = getelementptr inbounds %"struct.snappy::iovec", ptr %10, i64 %15, i32 0
121 %16 = load ptr, ptr %iov_base.i.i200, align 8
122 %add.ptr.i.i201 = getelementptr inbounds i8, ptr %16, i64 %13
123 call void @llvm.memcpy.p0.p0.i64(ptr %add.ptr.i.i201, ptr %add.ptr24, i64 %.sroa.speculated.i199, i1 false) #12
124 %add30.i203 = add i64 0, %.sroa.speculated.i199
125 store i64 %add30.i203, ptr null, align 8
126 %.pre245 = load i64, ptr %ip_limit_, align 8
129 if.end49: ; preds = %if.end18.i207, %while.cond.preheader.i176
130 %17 = phi i64 [ %.pre245, %if.end18.i207 ], [ %2, %while.cond.preheader.i176 ]
131 %add.ptr50 = getelementptr inbounds i8, ptr %add.ptr24, i64 %conv23
132 %sub.ptr.sub54 = sub i64 %17, 0
133 %cmp55 = icmp slt i64 %sub.ptr.sub54, 5
134 br i1 %cmp55, label %if.then56, label %for.cond
136 if.then56: ; preds = %if.end49
139 if.else: ; preds = %for.cond
140 %idxprom = zext i8 %0 to i64
141 %arrayidx68 = getelementptr inbounds [5 x i16], ptr @_ZN6snappy8internalL10char_tableE, i64 0, i64 %idxprom
142 %18 = load i16, ptr %arrayidx68, align 2
143 %conv69 = zext i16 %18 to i64
144 %19 = load i32, ptr undef, align 4
145 %shr71 = lshr i64 %conv69, 11
146 %arrayidx72 = getelementptr inbounds [5 x i32], ptr @_ZN6snappy8internalL8wordmaskE, i64 0, i64 %shr71
147 %20 = load i32, ptr %arrayidx72, align 4
148 %and73 = and i32 %20, %19
149 %conv74 = zext i32 %and73 to i64
150 %add79 = add nuw nsw i64 0, %conv74
151 %call80 = call zeroext i1 @_ZN6snappy17SnappyIOVecWriterAppendFromSelfEmm(ptr %writer, i64 %add79, i64 undef)
152 br i1 %call80, label %if.end82, label %cleanup105
154 if.end82: ; preds = %if.else
157 cleanup102: ; preds = %land.lhs.true5.i
158 %iov_base.i.i = getelementptr inbounds %"struct.snappy::iovec", ptr %5, i64 %6, i32 0
159 %21 = load ptr, ptr %iov_base.i.i, align 8
160 %add.ptr.i.i = getelementptr inbounds i8, ptr %21, i64 %7
161 call void @llvm.memmove.p0.p0.i64(ptr %add.ptr.i.i, ptr %incdec.ptr, i64 16, i1 false) #12
162 %22 = load <2 x i64>, ptr %curr_iov_written_.i, align 8
163 %23 = insertelement <2 x i64> undef, i64 %conv9, i32 0
164 %24 = shufflevector <2 x i64> %23, <2 x i64> undef, <2 x i32> zeroinitializer
165 %25 = add <2 x i64> %22, %24
166 store <2 x i64> %25, ptr undef, align 8
169 cleanup105: ; preds = %if.else, %while.body.preheader
173 ; Function Attrs: inlinehint
174 declare zeroext i1 @_ZN6snappy17SnappyIOVecWriterAppendFromSelfEmm(ptr, i64, i64) local_unnamed_addr #10 align 2