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| author | Chris Lattner <sabre@nondot.org> | 2009-01-19 23:03:13 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2009-01-19 23:03:13 +0000 |
| commit | 6ff645bf0fcfc0c62e9d9126e1243ec8bf10abbc (patch) | |
| tree | 0f2846ec35306faec76f585da95912249551fbd9 /test/Transforms/SimplifyCFG | |
| parent | c53361294957b63a9c1e405256c6f0a81db1685c (diff) | |
| download | llvm-6ff645bf0fcfc0c62e9d9126e1243ec8bf10abbc.tar.gz llvm-6ff645bf0fcfc0c62e9d9126e1243ec8bf10abbc.tar.bz2 llvm-6ff645bf0fcfc0c62e9d9126e1243ec8bf10abbc.tar.xz | |
Fix a problem exposed by PR3354: simplifycfg was making a potentially
trapping instruction be executed unconditionally.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62541 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/SimplifyCFG')
| -rw-r--r-- | test/Transforms/SimplifyCFG/2009-01-19-UnconditionalTrappingConstantExpr.ll | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyCFG/2009-01-19-UnconditionalTrappingConstantExpr.ll b/test/Transforms/SimplifyCFG/2009-01-19-UnconditionalTrappingConstantExpr.ll new file mode 100644 index 0000000000..0bc6bdb895 --- /dev/null +++ b/test/Transforms/SimplifyCFG/2009-01-19-UnconditionalTrappingConstantExpr.ll @@ -0,0 +1,20 @@ +; RUN: llvm-as < %s | opt -simplifycfg | llvm-dis | grep {br i1 } | count 2 +; PR3354 +; Do not merge bb1 into the entry block, it might trap. + +@G = extern_weak global i32 + +define i32 @test(i32 %tmp21, i32 %tmp24) { + %tmp25 = icmp sle i32 %tmp21, %tmp24 + br i1 %tmp25, label %bb2, label %bb1 + +bb1: ; preds = %bb + %tmp26 = icmp sgt i32 sdiv (i32 -32768, i32 ptrtoint (i32* @G to i32)), 0 + br i1 %tmp26, label %bb6, label %bb2 +bb2: + ret i32 42 + +bb6: + unwind +} + |