1; REQUIRES: asserts
2; RUN: opt -function-specialization -debug -S < %s 2>&1 | FileCheck %s
3
4; The purpose of this test is to check that we don't run the solver as there's
5; nothing to do here. For a test that doesn't trigger function specialisation,
6; it is intentionally 'big' because we also want to check that the ssa.copy
7; intrinsics that are introduced by the solver are cleaned up if we bail
8; early. Thus, first check the debug messages for the introduction of these
9; intrinsics:
10
11; CHECK: FnSpecialization: Analysing decl: foo
12; CHECK: Found replacement{{.*}} call i32 @llvm.ssa.copy.i32
13; CHECK: Found replacement{{.*}} call i32 @llvm.ssa.copy.i32
14
15; Then, make sure the solver didn't run:
16
17; CHECK-NOT: Running solver
18
19; Finally, check the absence and thus removal of these intrinsics:
20
21; CHECK-LABEL: @foo
22; CHECK-NOT:   call i32 @llvm.ssa.copy.i32
23
24@N = external dso_local global i32, align 4
25@B = external dso_local global i32*, align 8
26@A = external dso_local global i32*, align 8
27
28define dso_local i32 @foo() {
29entry:
30  br label %for.cond
31
32for.cond:
33  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
34  %0 = load i32, i32* @N, align 4
35  %cmp = icmp slt i32 %i.0, %0
36  br i1 %cmp, label %for.body, label %for.cond.cleanup
37
38for.cond.cleanup:
39  ret i32 undef
40
41for.body:
42  %1 = load i32*, i32** @B, align 8
43  %idxprom = sext i32 %i.0 to i64
44  %arrayidx = getelementptr inbounds i32, i32* %1, i64 %idxprom
45  %2 = load i32, i32* %arrayidx, align 4
46  %3 = load i32*, i32** @A, align 8
47  %arrayidx2 = getelementptr inbounds i32, i32* %3, i64 %idxprom
48  store i32 %2, i32* %arrayidx2, align 4
49  %inc = add nsw i32 %i.0, 1
50  br label %for.cond
51}
52