1 ; RUN: opt < %s -simplifycfg -phi-node-folding-threshold=2 -S | FileCheck %s
3 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"
4 target triple = "x86_64-unknown-linux-gnu"
6 define i32 @test1(i32 %a, i32 %b, i32 %c) nounwind {
9 %tmp1 = icmp eq i32 %b, 0
10 br i1 %tmp1, label %bb1, label %bb3
13 %tmp2 = icmp sgt i32 %c, 1
14 br i1 %tmp2, label %bb2, label %bb3
16 ; CHECK-NEXT: icmp sgt i32 %c, 1
17 ; CHECK-NEXT: add i32 %a, 1
18 ; CHECK-NEXT: select i1 %tmp2, i32 %tmp3, i32 %a
19 ; CHECK-NEXT: br label %bb3
25 bb3: ; preds = %bb2, %entry
26 %tmp4 = phi i32 [ %b, %entry ], [ %a, %bb1 ], [ %tmp3, %bb2 ]
27 %tmp5 = sub i32 %tmp4, 1
31 define i8* @test4(i1* %dummy, i8* %a, i8* %b) {
32 ; Test that we don't speculate an arbitrarily large number of unfolded constant
34 ; CHECK-LABEL: @test4(
37 %cond1 = load volatile i1, i1* %dummy
38 br i1 %cond1, label %if, label %end
41 %cond2 = load volatile i1, i1* %dummy
42 br i1 %cond2, label %then, label %end
48 %x1 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 1 to i8*), %then ]
49 %x2 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 2 to i8*), %then ]
50 %x3 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 3 to i8*), %then ]
51 %x4 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 4 to i8*), %then ]
52 %x5 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 5 to i8*), %then ]
53 %x6 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 6 to i8*), %then ]
54 %x7 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 7 to i8*), %then ]
55 %x8 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 8 to i8*), %then ]
56 %x9 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 9 to i8*), %then ]
57 %x10 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 10 to i8*), %then ]
73 define i32* @test5(i32 %a, i32 %b, i32 %c, i32* dereferenceable(10) %ptr1,
74 i32* dereferenceable(10) %ptr2, i32** dereferenceable(10) %ptr3) nounwind {
75 ; CHECK-LABEL: @test5(
77 %tmp1 = icmp eq i32 %b, 0
78 br i1 %tmp1, label %bb1, label %bb3
81 %tmp2 = icmp sgt i32 %c, 1
82 br i1 %tmp2, label %bb2, label %bb3
84 ; CHECK-NEXT: icmp sgt i32 %c, 1
85 ; CHECK-NEXT: load i32*, i32** %ptr3
86 ; CHECK-NOT: dereferenceable
87 ; CHECK-NEXT: select i1 %tmp2, i32* %tmp3, i32* %ptr2
88 ; CHECK-NEXT: ret i32* %tmp3.ptr2
91 %tmp3 = load i32*, i32** %ptr3, !dereferenceable !{i64 10}
94 bb3: ; preds = %bb2, %entry
95 %tmp4 = phi i32* [ %ptr1, %entry ], [ %ptr2, %bb1 ], [ %tmp3, %bb2 ]