1 ; RUN: opt -passes='function(gvn-hoist),function(newgvn),function(gvn-hoist)' -S < %s | FileCheck %s
2 ; Test to demonstrate that newgvn creates opportunities for
3 ; more gvn-hoist when sibling branches contain identical expressions.
5 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
6 target triple = "x86_64-unknown-linux-gnu"
8 ; Check that all "or" expressions are hoisted.
13 define ptr @encode(ptr %p, i32 %v) {
15 %p.addr = alloca ptr, align 8
16 %v.addr = alloca i32, align 4
17 store ptr %p, ptr %p.addr, align 8
18 store i32 %v, ptr %v.addr, align 4
19 %0 = load i32, ptr %v.addr, align 4
20 %cmp = icmp ult i32 %0, 23
21 br i1 %cmp, label %if.then, label %if.else
23 if.then: ; preds = %entry
24 %1 = load i32, ptr %v.addr, align 4
26 %conv = trunc i32 %or to i8
27 %2 = load ptr, ptr %p.addr, align 8
28 %incdec.ptr = getelementptr inbounds i8, ptr %2, i32 1
29 store ptr %incdec.ptr, ptr %p.addr, align 8
30 store i8 %conv, ptr %2, align 1
33 if.else: ; preds = %entry
34 %3 = load i32, ptr %v.addr, align 4
35 %cmp1 = icmp ult i32 %3, 42
36 br i1 %cmp1, label %if.then3, label %if.else9
38 if.then3: ; preds = %if.else
39 %4 = load i32, ptr %v.addr, align 4
41 %conv5 = trunc i32 %or4 to i8
42 %5 = load ptr, ptr %p.addr, align 8
43 %incdec.ptr6 = getelementptr inbounds i8, ptr %5, i32 1
44 store ptr %incdec.ptr6, ptr %p.addr, align 8
45 store i8 %conv5, ptr %5, align 1
46 %6 = load i32, ptr %v.addr, align 4
47 %conv7 = trunc i32 %6 to i8
48 %7 = load ptr, ptr %p.addr, align 8
49 %incdec.ptr8 = getelementptr inbounds i8, ptr %7, i32 1
50 store ptr %incdec.ptr8, ptr %p.addr, align 8
51 store i8 %conv7, ptr %7, align 1
54 if.else9: ; preds = %if.else
55 %8 = load i32, ptr %v.addr, align 4
56 %or10 = or i32 %8, 128
57 %conv11 = trunc i32 %or10 to i8
58 %9 = load ptr, ptr %p.addr, align 8
59 %incdec.ptr12 = getelementptr inbounds i8, ptr %9, i32 1
60 store ptr %incdec.ptr12, ptr %p.addr, align 8
61 store i8 %conv11, ptr %9, align 1
62 %10 = load i32, ptr %v.addr, align 4
63 %shr = lshr i32 %10, 7
64 %conv13 = trunc i32 %shr to i8
65 %11 = load ptr, ptr %p.addr, align 8
66 %incdec.ptr14 = getelementptr inbounds i8, ptr %11, i32 1
67 store ptr %incdec.ptr14, ptr %p.addr, align 8
68 store i8 %conv13, ptr %11, align 1
71 if.end: ; preds = %if.else9, %if.then3
74 if.end15: ; preds = %if.end, %if.then
75 %12 = load ptr, ptr %p.addr, align 8