diff options
| author | Chris Lattner <sabre@nondot.org> | 2004-03-15 04:17:53 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2004-03-15 04:17:53 +0000 |
| commit | 66d0884954a4d3caa8146b39fbb6e31af8304020 (patch) | |
| tree | 62698cda7dceaa066e0a12f04305d28e24fe8fb8 | |
| parent | 118dd0ce3d8e4b0a945afc95c9538d5005abacde (diff) | |
| download | external_llvm-66d0884954a4d3caa8146b39fbb6e31af8304020.zip external_llvm-66d0884954a4d3caa8146b39fbb6e31af8304020.tar.gz external_llvm-66d0884954a4d3caa8146b39fbb6e31af8304020.tar.bz2 | |
Make sure that pure calls don't kill loads
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12416 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | test/Analysis/LoadVN/call_pure_function.ll | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/test/Analysis/LoadVN/call_pure_function.ll b/test/Analysis/LoadVN/call_pure_function.ll new file mode 100644 index 0000000..c9de486 --- /dev/null +++ b/test/Analysis/LoadVN/call_pure_function.ll @@ -0,0 +1,13 @@ +; RUN: llvm-as < %s | opt -basicaa -load-vn -gcse -instcombine | llvm-dis | not grep sub +declare int %strlen(sbyte*) +declare void %use(int %X) + +sbyte %test(sbyte* %P, sbyte* %Q) { + %A = load sbyte* %Q + %X = call int %strlen(sbyte* %P) + %B = load sbyte* %Q ;; CSE with A. + call void %use(int %X) ;; make strlen not dead + + %C = sub sbyte %A, %B + ret sbyte %C +} |