xref: /llvm-project/llvm/test/Transforms/GlobalOpt/heap-sra-phi-no-null-opt.ll (revision d586bd5ca231a6022f439d4c6e43cfeeb53eb1d6)
1; RUN: opt < %s -passes=globalopt -S | FileCheck %s
2target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
3
4%struct.foo = type { i32, i32 }
5
6@X = internal global ptr null		; <ptr> [#uses=2]
7; CHECK: @X
8; CHECK-NOT: @X.f0
9
10define void @bar(i32 %Size) nounwind noinline #0 {
11;  CHECK-LABEL: @bar(
12entry:
13	%malloccall = tail call ptr @malloc(i64 8000000) ; <ptr> [#uses=1]
14	%.sub = getelementptr [1000000 x %struct.foo], ptr %malloccall, i32 0, i32 0		; <ptr> [#uses=1]
15	store ptr %.sub, ptr @X, align 4
16	ret void
17}
18
19declare noalias ptr @malloc(i64)
20
21define i32 @baz() nounwind readonly noinline #0 {
22; CHECK-LABEL: @baz(
23bb1.thread:
24	%tmpLD1 = load ptr, ptr @X, align 4		; <ptr> [#uses=1]
25; CHECK: load ptr, ptr @X, align 4
26	br label %bb1
27
28bb1:		; preds = %bb1, %bb1.thread
29        %tmp = phi ptr [%tmpLD1, %bb1.thread ], [ %tmpLD2, %bb1 ]		; <i32> [#uses=2]
30; CHECK: %tmp = phi ptr [ %tmpLD1, %bb1.thread ], [ %tmpLD2, %bb1 ]
31	%i.0.reg2mem.0 = phi i32 [ 0, %bb1.thread ], [ %indvar.next, %bb1 ]		; <i32> [#uses=2]
32	%sum.0.reg2mem.0 = phi i32 [ 0, %bb1.thread ], [ %tmp3, %bb1 ]		; <i32> [#uses=1]
33	%tmp1 = getelementptr %struct.foo, ptr %tmp, i32 %i.0.reg2mem.0, i32 0		; <ptr> [#uses=1]
34	%tmp2 = load i32, ptr %tmp1, align 4		; <i32> [#uses=1]
35; CHECK: load i32, ptr %tmp1, align 4
36	%tmp6 = add i32 %tmp2, %sum.0.reg2mem.0		; <i32> [#uses=2]
37	%tmp4 = getelementptr %struct.foo, ptr %tmp, i32 %i.0.reg2mem.0, i32 1		; <ptr> [#uses=1]
38        %tmp5 = load i32 , ptr %tmp4
39;  CHECK: load i32, ptr %tmp4
40        %tmp3 = add i32 %tmp5, %tmp6
41	%indvar.next = add i32 %i.0.reg2mem.0, 1		; <i32> [#uses=2]
42
43      	%tmpLD2 = load ptr, ptr @X, align 4		; <ptr> [#uses=1]
44; CHECK: load ptr, ptr @X, align 4
45
46	%exitcond = icmp eq i32 %indvar.next, 1200		; <i1> [#uses=1]
47	br i1 %exitcond, label %bb2, label %bb1
48
49bb2:		; preds = %bb1
50	ret i32 %tmp3
51}
52
53attributes #0 = { null_pointer_is_valid }
54