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Diffstat (limited to 'test/Transforms/LoopUnroll/2012-04-09-unroll-indirectbr.ll')
| -rw-r--r-- | test/Transforms/LoopUnroll/2012-04-09-unroll-indirectbr.ll | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/test/Transforms/LoopUnroll/2012-04-09-unroll-indirectbr.ll b/test/Transforms/LoopUnroll/2012-04-09-unroll-indirectbr.ll new file mode 100644 index 0000000000..8946a23c20 --- /dev/null +++ b/test/Transforms/LoopUnroll/2012-04-09-unroll-indirectbr.ll @@ -0,0 +1,40 @@ +; RUN: opt < %s -S -loop-unroll -simplifycfg | FileCheck %s +; PR12513: Loop unrolling breaks with indirect branches. +; If loop unrolling attempts to transform this loop, it replaces the +; indirectbr successors. SimplifyCFG then considers them to be unreachable. +declare void @subtract() nounwind uwtable + +; CHECK-NOT: unreachable +define i32 @main(i32 %argc, i8** nocapture %argv) nounwind uwtable { +entry: + %vals19 = alloca [5 x i32], align 16 + %x20 = alloca i32, align 4 + store i32 135, i32* %x20, align 4 + br label %for.body + +for.body: ; preds = ; %call2_termjoin, %call3_termjoin + %indvars.iv = phi i64 [ 0, %entry ], [ %joinphi15.in.in, %call2_termjoin ] + %a6 = call coldcc i8* @funca(i8* blockaddress(@main, %for.body_code), i8* +blockaddress(@main, %for.body_codeprime)) nounwind + indirectbr i8* %a6, [label %for.body_code, label %for.body_codeprime] + +for.body_code: ; preds = %for.body + call void @subtract() + br label %call2_termjoin + +call2_termjoin: ; preds = %for.body_codeprime, %for.body_code + %joinphi15.in.in = add i64 %indvars.iv, 1 + %exitcond = icmp eq i64 %joinphi15.in.in, 5 + br i1 %exitcond, label %for.end, label %for.body + +for.end: ; preds = %call2_termjoin + ret i32 0 + +for.body_codeprime: ; preds = %for.body + call void @subtract_v2(i64 %indvars.iv) + br label %call2_termjoin +} + +declare coldcc i8* @funca(i8*, i8*) readonly + +declare void @subtract_v2(i64) nounwind uwtable |