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| author | Evan Cheng <evan.cheng@apple.com> | 2011-04-27 19:32:43 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2011-04-27 19:32:43 +0000 |
| commit | 309db7c947de7f0f9730dff5f95bc1cc5bd1db7d (patch) | |
| tree | f274f3ca9e79981b0157f28c874da2f367347c34 /test/CodeGen/ARM | |
| parent | bddc1ca18a8ca23f6f145d2f5d006fa07e72a870 (diff) | |
| download | llvm-309db7c947de7f0f9730dff5f95bc1cc5bd1db7d.tar.gz llvm-309db7c947de7f0f9730dff5f95bc1cc5bd1db7d.tar.bz2 llvm-309db7c947de7f0f9730dff5f95bc1cc5bd1db7d.tar.xz | |
If converter was being too cute. It look for root BBs (which don't have
successors) and use inverse depth first search to traverse the BBs. However
that doesn't work when the CFG has infinite loops. Simply do a linear
traversal of all BBs work just fine.
rdar://9344645
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130324 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/ARM')
| -rw-r--r-- | test/CodeGen/ARM/2011-04-27-IfCvtBug.ll | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/2011-04-27-IfCvtBug.ll b/test/CodeGen/ARM/2011-04-27-IfCvtBug.ll new file mode 100644 index 0000000000..0741049cff --- /dev/null +++ b/test/CodeGen/ARM/2011-04-27-IfCvtBug.ll @@ -0,0 +1,59 @@ +; RUN: llc < %s -mtriple=thumbv7-apple-ios + +; If converter was being too cute. It look for root BBs (which don't have +; successors) and use inverse depth first search to traverse the BBs. However +; that doesn't work when the CFG has infinite loops. Simply do a linear +; traversal of all BBs work just fine. + +; rdar://9344645 + +%struct.hc = type { i32, i32, i32, i32 } + +define i32 @t(i32 %type) optsize { +entry: + br i1 undef, label %if.then, label %if.else + +if.then: + unreachable + +if.else: + br i1 undef, label %if.then15, label %if.else18 + +if.then15: + unreachable + +if.else18: + switch i32 %type, label %if.else173 [ + i32 3, label %if.then115 + i32 1, label %if.then102 + ] + +if.then102: + br i1 undef, label %cond.true10.i, label %t.exit + +cond.true10.i: + br label %t.exit + +t.exit: + unreachable + +if.then115: + br i1 undef, label %if.else163, label %if.else145 + +if.else145: + %call150 = call fastcc %struct.hc* @foo(%struct.hc* undef, i32 34865152) optsize + br label %while.body172 + +if.else163: + %call168 = call fastcc %struct.hc* @foo(%struct.hc* undef, i32 34078720) optsize + br label %while.body172 + +while.body172: + br label %while.body172 + +if.else173: + ret i32 -1 +} + +declare hidden fastcc %struct.hc* @foo(%struct.hc* nocapture, i32) nounwind optsize + |