llvm.org GIT mirror llvm / 5cd89b0
[TRE] Add another test for OptRemark. This shows we emit a remark for tail recursion -> loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@308525 91177308-0d34-0410-b5e6-96231b3b80d8 Davide Italiano 2 years ago
1 changed file(s) with 39 addition(s) and 0 deletion(s). Raw diff Collapse all Expand all
0 ; RUN: opt %s -tailcallelim -pass-remarks=tailcallelim -o /dev/null 2>&1 | FileCheck %s
1 ; RUN: opt %s -o /dev/null -passes='require,tailcallelim' -pass-remarks=tailcallelim 2>&1 | FileCheck %s
2
3 ; CHECK: /home/davide/pat.c:2:20: marked as tail call candidate
4 ; CHECK: /home/davide/pat.c:2:20: transforming tail recursion into loop
5 define i32 @fib(i32 %n) nounwind ssp {
6 entry:
7 %cmp = icmp slt i32 %n, 2
8 br i1 %cmp, label %if.then, label %if.end
9
10 if.then: ; preds = %entry
11 br label %return
12
13 if.end: ; preds = %entry
14 %sub = add nsw i32 %n, -2
15 %call = call i32 @fib(i32 %sub)
16 %sub3 = add nsw i32 %n, -1
17 %call4 = call i32 @fib(i32 %sub3), !dbg !8
18 %add = add nsw i32 %call, %call4
19 br label %return
20
21 return: ; preds = %if.end, %if.then
22 %retval.0 = phi i32 [ 1, %if.then ], [ %add, %if.end ]
23 ret i32 %retval.0
24 }
25
26 !llvm.dbg.cu = !{!0}
27 !llvm.module.flags = !{!3, !4}
28 !llvm.ident = !{!5}
29
30 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !2)
31 !1 = !DIFile(filename: "/home/davide/pat.c", directory: "/tmp")
32 !2 = !{}
33 !3 = !{i32 2, !"Debug Info Version", i32 3}
34 !4 = !{i32 1, !"PIC Level", i32 2}
35 !5 = !{!"clang version 3.9.0 "}
36 !6 = distinct !DISubprogram(name: "success", scope: !1, file: !1, line: 1, type: !7, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !2)
37 !7 = !DISubroutineType(types: !2)
38 !8 = !DILocation(line: 2, column: 20, scope: !6)