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author | Dan Gohman <gohman@apple.com> | 2009-11-23 16:13:39 +0000 |
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committer | Dan Gohman <gohman@apple.com> | 2009-11-23 16:13:39 +0000 |
commit | 8f3817f505029e97d28c54548069d5bbaa9d5527 (patch) | |
tree | f0b4159d98abf42d6fff33005a9f1ce700e007ba /test/Transforms/IPConstantProp/user-with-multiple-uses.ll | |
parent | e8e01b600cd377504e5288a31152b1db4b8477b1 (diff) | |
download | external_llvm-8f3817f505029e97d28c54548069d5bbaa9d5527.zip external_llvm-8f3817f505029e97d28c54548069d5bbaa9d5527.tar.gz external_llvm-8f3817f505029e97d28c54548069d5bbaa9d5527.tar.bz2 |
Fix a use of an invalidated iterator in the case where there are multiple
adjacent uses of a dead basic block from the same user. This fixes PR5596.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89658 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/IPConstantProp/user-with-multiple-uses.ll')
-rw-r--r-- | test/Transforms/IPConstantProp/user-with-multiple-uses.ll | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/test/Transforms/IPConstantProp/user-with-multiple-uses.ll b/test/Transforms/IPConstantProp/user-with-multiple-uses.ll new file mode 100644 index 0000000..402ea41 --- /dev/null +++ b/test/Transforms/IPConstantProp/user-with-multiple-uses.ll @@ -0,0 +1,30 @@ +; RUN: opt < %s -S -ipsccp | FileCheck %s +; PR5596 + +; IPSCCP should propagate the 0 argument, eliminate the switch, and propagate +; the result. + +; CHECK: define i32 @main() noreturn nounwind { +; CHECK-NEXT: entry: +; CHECK-NEXT: %call2 = tail call i32 @wwrite(i64 0) nounwind +; CHECK-NEXT: ret i32 123 + +define i32 @main() noreturn nounwind { +entry: + %call2 = tail call i32 @wwrite(i64 0) nounwind + ret i32 %call2 +} + +define internal i32 @wwrite(i64 %i) nounwind readnone { +entry: + switch i64 %i, label %sw.default [ + i64 3, label %return + i64 10, label %return + ] + +sw.default: + ret i32 123 + +return: + ret i32 0 +} |