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| author | Robert Lougher <rob.lougher@gmail.com> | 2019-03-19 20:24:28 +0000 |
|---|---|---|
| committer | Robert Lougher <rob.lougher@gmail.com> | 2019-03-19 20:24:28 +0000 |
| commit | de548ccab9f1dfdefff338754fbc151f4b5cee46 (patch) | |
| tree | 581194c9a51c9647c9d84473a60795218bf1991a /llvm/test/LTO | |
| parent | 70537abe525cd6499feae5f34e5ae3d107a0f940 (diff) | |
| download | bcm5719-llvm-de548ccab9f1dfdefff338754fbc151f4b5cee46.tar.gz bcm5719-llvm-de548ccab9f1dfdefff338754fbc151f4b5cee46.zip | |
[TailCallElim] Add tailcall elimination pass to LTO pipelines
LTO provides additional opportunities for tailcall elimination due to
link-time inlining and visibility of nocapture attribute. Testing showed
negligible impact on compilation times.
Differential Revision: https://reviews.llvm.org/D58391
llvm-svn: 356511
Diffstat (limited to 'llvm/test/LTO')
| -rw-r--r-- | llvm/test/LTO/X86/tailcallelim.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/llvm/test/LTO/X86/tailcallelim.ll b/llvm/test/LTO/X86/tailcallelim.ll new file mode 100644 index 00000000000..2c3a9b52fa9 --- /dev/null +++ b/llvm/test/LTO/X86/tailcallelim.ll @@ -0,0 +1,22 @@ +; Check that the LTO pipelines add the Tail Call Elimination pass. + +; RUN: llvm-as < %s > %t1 +; RUN: llvm-lto -o %t2 %t1 --exported-symbol=foo -save-merged-module +; RUN: llvm-dis < %t2.merged.bc | FileCheck %s + +; RUN: llvm-lto2 run -r %t1,foo,plx -r %t1,bar,plx -o %t3 %t1 -save-temps +; RUN: llvm-dis < %t3.0.4.opt.bc | FileCheck %s + +; RUN: llvm-lto2 run -r %t1,foo,plx -r %t1,bar,plx -o %t4 %t1 -save-temps -use-new-pm +; RUN: llvm-dis < %t4.0.4.opt.bc | FileCheck %s + +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" +target triple = "x86_64-unknown-linux-gnu" + +define void @foo() { +; CHECK: tail call void @bar() + call void @bar() + ret void +} + +declare void @bar() |
