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| author | Duncan Sands <baldrick@free.fr> | 2011-01-02 13:38:21 +0000 |
|---|---|---|
| committer | Duncan Sands <baldrick@free.fr> | 2011-01-02 13:38:21 +0000 |
| commit | 64f1c0dcda41011f76ed66b5eb986d2d7a161a4e (patch) | |
| tree | 653731707fc80fbb972d0692df287225d9d09a11 /llvm/test/Transforms/LoopSimplify | |
| parent | 7e23b72221ec6fac8cf97600c94067f568d67415 (diff) | |
| download | bcm5719-llvm-64f1c0dcda41011f76ed66b5eb986d2d7a161a4e.tar.gz bcm5719-llvm-64f1c0dcda41011f76ed66b5eb986d2d7a161a4e.zip | |
Fix PR8702 by not having LoopSimplify claim to preserve LCSSA form. As described
in the PR, the pass could break LCSSA form when inserting preheaders. It probably
would be easy enough to fix this, but since currently we always go into LCSSA form
after running this pass, doing so is not urgent.
llvm-svn: 122695
Diffstat (limited to 'llvm/test/Transforms/LoopSimplify')
| -rw-r--r-- | llvm/test/Transforms/LoopSimplify/2010-12-26-PHIInfiniteLoop.ll | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopSimplify/2010-12-26-PHIInfiniteLoop.ll b/llvm/test/Transforms/LoopSimplify/2010-12-26-PHIInfiniteLoop.ll new file mode 100644 index 00000000000..4973d43b451 --- /dev/null +++ b/llvm/test/Transforms/LoopSimplify/2010-12-26-PHIInfiniteLoop.ll @@ -0,0 +1,43 @@ +; RUN: opt < %s -loopsimplify -S +; PR8702 +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" +target triple = "x86_64-unknown-freebsd9.0" + +declare void @foo(i32 %x) + +define fastcc void @inm_merge() nounwind { +entry: + br label %for.cond + +for.cond: ; preds = %while.cond36.i, %entry + br i1 undef, label %do.body, label %for.body + +for.body: ; preds = %for.cond + br i1 undef, label %while.cond36.i, label %if.end44 + +if.end44: ; preds = %for.body + %call49 = call fastcc i32 @inm_get_source() + br i1 undef, label %if.end54, label %for.cond64 + +if.end54: ; preds = %if.end44 + br label %while.cond36.i + +while.cond36.i: ; preds = %if.end54, %for.body + br label %for.cond + +for.cond64: ; preds = %if.end88, %for.cond64, %if.end44 + %error.161 = phi i32 [ %error.161, %for.cond64 ], [ %error.161, %if.end88 ], [ %call49, %if.end44 ] + call void @foo(i32 %error.161) + br i1 undef, label %for.cond64, label %if.end88 + +if.end88: ; preds = %for.cond64 + br i1 undef, label %for.cond64, label %if.end98 + +if.end98: ; preds = %if.end88 + unreachable + +do.body: ; preds = %for.cond + unreachable +} + +declare fastcc i32 @inm_get_source() nounwind |
