1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -simplifycfg -phi-node-folding-threshold=2 -S | FileCheck %s
4 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-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
5 target triple = "x86_64-unknown-linux-gnu"
7 define i32 @test1(i32 %a, i32 %b, i32 %c) nounwind {
10 ; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[B:%.*]], 0
11 ; CHECK-NEXT: [[TMP2:%.*]] = icmp sgt i32 [[C:%.*]], 1
12 ; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[A:%.*]], 1
13 ; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[TMP2]], i32 [[TMP3]], i32 [[A]]
14 ; CHECK-NEXT: [[TMP4:%.*]] = select i1 [[TMP1]], i32 [[SPEC_SELECT]], i32 [[B]]
15 ; CHECK-NEXT: [[TMP5:%.*]] = sub i32 [[TMP4]], 1
16 ; CHECK-NEXT: ret i32 [[TMP5]]
19 %tmp1 = icmp eq i32 %b, 0
20 br i1 %tmp1, label %bb1, label %bb3
23 %tmp2 = icmp sgt i32 %c, 1
24 br i1 %tmp2, label %bb2, label %bb3
30 bb3: ; preds = %bb2, %entry
31 %tmp4 = phi i32 [ %b, %entry ], [ %a, %bb1 ], [ %tmp3, %bb2 ]
32 %tmp5 = sub i32 %tmp4, 1
36 define i8* @test4(i1* %dummy, i8* %a, i8* %b) {
37 ; Test that we don't speculate an arbitrarily large number of unfolded constant
39 ; CHECK-LABEL: @test4(
41 ; CHECK-NEXT: [[COND1:%.*]] = load volatile i1, i1* [[DUMMY:%.*]]
42 ; CHECK-NEXT: br i1 [[COND1]], label [[IF:%.*]], label [[END:%.*]]
44 ; CHECK-NEXT: [[COND2:%.*]] = load volatile i1, i1* [[DUMMY]]
45 ; CHECK-NEXT: br i1 [[COND2]], label [[THEN:%.*]], label [[END]]
47 ; CHECK-NEXT: br label [[END]]
49 ; CHECK-NEXT: [[X1:%.*]] = phi i8* [ [[A:%.*]], [[ENTRY:%.*]] ], [ [[B:%.*]], [[IF]] ], [ inttoptr (i64 1 to i8*), [[THEN]] ]
50 ; CHECK-NEXT: [[X2:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 2 to i8*), [[THEN]] ]
51 ; CHECK-NEXT: [[X3:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 3 to i8*), [[THEN]] ]
52 ; CHECK-NEXT: [[X4:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 4 to i8*), [[THEN]] ]
53 ; CHECK-NEXT: [[X5:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 5 to i8*), [[THEN]] ]
54 ; CHECK-NEXT: [[X6:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 6 to i8*), [[THEN]] ]
55 ; CHECK-NEXT: [[X7:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 7 to i8*), [[THEN]] ]
56 ; CHECK-NEXT: [[X8:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 8 to i8*), [[THEN]] ]
57 ; CHECK-NEXT: [[X9:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 9 to i8*), [[THEN]] ]
58 ; CHECK-NEXT: [[X10:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 10 to i8*), [[THEN]] ]
59 ; CHECK-NEXT: ret i8* [[X10]]
63 %cond1 = load volatile i1, i1* %dummy
64 br i1 %cond1, label %if, label %end
67 %cond2 = load volatile i1, i1* %dummy
68 br i1 %cond2, label %then, label %end
74 %x1 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 1 to i8*), %then ]
75 %x2 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 2 to i8*), %then ]
76 %x3 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 3 to i8*), %then ]
77 %x4 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 4 to i8*), %then ]
78 %x5 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 5 to i8*), %then ]
79 %x6 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 6 to i8*), %then ]
80 %x7 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 7 to i8*), %then ]
81 %x8 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 8 to i8*), %then ]
82 %x9 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 9 to i8*), %then ]
83 %x10 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 10 to i8*), %then ]
88 define i32* @test5(i32 %a, i32 %b, i32 %c, i32* dereferenceable(10) %ptr1,
89 ; CHECK-LABEL: @test5(
91 ; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[B:%.*]], 0
92 ; CHECK-NEXT: br i1 [[TMP1]], label [[BB1:%.*]], label [[BB3:%.*]]
94 ; CHECK-NEXT: [[TMP2:%.*]] = icmp sgt i32 [[C:%.*]], 1
95 ; CHECK-NEXT: [[TMP3:%.*]] = load i32*, i32** [[PTR3:%.*]]
96 ; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[TMP2]], i32* [[TMP3]], i32* [[PTR2:%.*]]
97 ; CHECK-NEXT: ret i32* [[SPEC_SELECT]]
99 ; CHECK-NEXT: ret i32* [[PTR1:%.*]]
101 i32* dereferenceable(10) %ptr2, i32** dereferenceable(10) %ptr3) nounwind {
103 %tmp1 = icmp eq i32 %b, 0
104 br i1 %tmp1, label %bb1, label %bb3
106 bb1: ; preds = %entry
107 %tmp2 = icmp sgt i32 %c, 1
108 br i1 %tmp2, label %bb2, label %bb3
111 %tmp3 = load i32*, i32** %ptr3, !dereferenceable !{i64 10}
114 bb3: ; preds = %bb2, %entry
115 %tmp4 = phi i32* [ %ptr1, %entry ], [ %ptr2, %bb1 ], [ %tmp3, %bb2 ]