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authorChris Lattner <sabre@nondot.org>2009-09-02 05:35:45 +0000
committerChris Lattner <sabre@nondot.org>2009-09-02 05:35:45 +0000
commitf19f9347b85279100f7d549154e37b6d726c3c94 (patch)
treedb74b60eface483db794885f33c201e27dd71948 /test/Transforms/ConstProp
parent9e17b632ec7fdd150a2f08ed4b661011ed47dcfa (diff)
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fix PR4848 an infinite loop when indexing down through a recursive gep
and we get the original pointer type. This doesn't mean that we're at the first pointer being indexed. Correct the predicate. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80762 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/ConstProp')
-rw-r--r--test/Transforms/ConstProp/2009-10-01-GEP-Crash.ll24
1 files changed, 24 insertions, 0 deletions
diff --git a/test/Transforms/ConstProp/2009-10-01-GEP-Crash.ll b/test/Transforms/ConstProp/2009-10-01-GEP-Crash.ll
new file mode 100644
index 0000000..4d51bf6
--- /dev/null
+++ b/test/Transforms/ConstProp/2009-10-01-GEP-Crash.ll
@@ -0,0 +1,24 @@
+; RUN: llvm-as < %s | opt -constprop | llvm-dis
+; PR4848
+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"
+target triple = "x86_64-unknown-linux-gnu"
+
+%0 = type { %struct.anon }
+%1 = type { %0, %2, [24 x i8] }
+%2 = type <{ %3, %3 }>
+%3 = type { %struct.hrtimer_cpu_base*, i32, %struct.rb_root, %struct.rb_node*, %struct.pgprot, i64 ()*, [16 x i8] }
+%struct.anon = type { }
+%struct.hrtimer_clock_base = type { %struct.hrtimer_cpu_base*, i32, %struct.rb_root, %struct.rb_node*, %struct.pgprot, i64 ()*, %struct.pgprot, %struct.pgprot }
+%struct.hrtimer_cpu_base = type { %0, [2 x %struct.hrtimer_clock_base], %struct.pgprot, i32, i64 }
+%struct.pgprot = type { i64 }
+%struct.rb_node = type { i64, %struct.rb_node*, %struct.rb_node* }
+%struct.rb_root = type { %struct.rb_node* }
+
+@per_cpu__hrtimer_bases = external global %1, align 8 ; <%1*> [#uses=1]
+
+define void @init_hrtimers_cpu(i32 %cpu) nounwind noredzone section ".cpuinit.text" {
+entry:
+ %tmp3 = getelementptr %struct.hrtimer_cpu_base* bitcast (%1* @per_cpu__hrtimer_bases to %struct.hrtimer_cpu_base*), i32 0, i32 0 ; <%0*> [#uses=1]
+ %tmp5 = bitcast %0* %tmp3 to i8* ; <i8*> [#uses=0]
+ unreachable
+}