1; RUN: opt -instcombine -S < %s | FileCheck %s
2
3;; This tests that the instructions in the entry blocks are sunk into each
4;; arm of the 'if'.
5
6define i32 @test1(i1 %C, i32 %A, i32 %B) {
7; CHECK-LABEL: @test1(
8entry:
9        %tmp.2 = sdiv i32 %A, %B                ; <i32> [#uses=1]
10        %tmp.9 = add i32 %B, %A         ; <i32> [#uses=1]
11        br i1 %C, label %then, label %endif
12
13then:           ; preds = %entry
14        ret i32 %tmp.9
15
16endif:          ; preds = %entry
17; CHECK: sdiv i32
18; CHECK-NEXT: ret i32
19        ret i32 %tmp.2
20}
21
22
23;; PHI use, sink divide before call.
24define i32 @test2(i32 %x) nounwind ssp {
25; CHECK-LABEL: @test2(
26; CHECK-NOT: sdiv i32
27entry:
28  br label %bb
29
30bb:                                               ; preds = %bb2, %entry
31  %x_addr.17 = phi i32 [ %x, %entry ], [ %x_addr.0, %bb2 ] ; <i32> [#uses=4]
32  %i.06 = phi i32 [ 0, %entry ], [ %4, %bb2 ]     ; <i32> [#uses=1]
33  %0 = add nsw i32 %x_addr.17, 1                  ; <i32> [#uses=1]
34  %1 = sdiv i32 %0, %x_addr.17                    ; <i32> [#uses=1]
35  %2 = icmp eq i32 %x_addr.17, 0                  ; <i1> [#uses=1]
36  br i1 %2, label %bb1, label %bb2
37
38bb1:                                              ; preds = %bb
39; CHECK: bb1:
40; CHECK-NEXT: add nsw i32 %x_addr.17, 1
41; CHECK-NEXT: sdiv i32
42; CHECK-NEXT: tail call i32 @bar()
43  %3 = tail call i32 @bar() nounwind       ; <i32> [#uses=0]
44  br label %bb2
45
46bb2:                                              ; preds = %bb, %bb1
47  %x_addr.0 = phi i32 [ %1, %bb1 ], [ %x_addr.17, %bb ] ; <i32> [#uses=2]
48  %4 = add nsw i32 %i.06, 1                       ; <i32> [#uses=2]
49  %exitcond = icmp eq i32 %4, 1000000             ; <i1> [#uses=1]
50  br i1 %exitcond, label %bb4, label %bb
51
52bb4:                                              ; preds = %bb2
53  ret i32 %x_addr.0
54}
55
56declare i32 @bar()
57