Remove invalid assert in DAGTypeLegalizer::RemapValue
There is a comment at the top of DAGTypeLegalizer::PerformExpensiveChecks
which, in part, says:
// Note that these invariants may not hold momentarily when processing a node:
// the node being processed may be put in a map before being marked Processed.
Unfortunately, this assert would be valid only if the above-mentioned invariant
held unconditionally. This was causing llc to assert when, in fact,
everything was fine.
Thanks to Richard Sandiford for investigating this issue!
Fixes PR16562.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186338 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/PowerPC/remap-crash.ll b/test/CodeGen/PowerPC/remap-crash.ll
new file mode 100644
index 0000000..515f720
--- /dev/null
+++ b/test/CodeGen/PowerPC/remap-crash.ll
@@ -0,0 +1,57 @@
+; RUN: llc -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 < %s
+target triple = "powerpc64-unknown-linux-gnu"
+
+define void @autogen_SD13() {
+BB:
+ br label %CF78
+
+CF78: ; preds = %CF87, %CF86, %CF78, %BB
+ %Cmp = icmp ule <16 x i64> zeroinitializer, zeroinitializer
+ br i1 undef, label %CF78, label %CF86
+
+CF86: ; preds = %CF78
+ br i1 undef, label %CF78, label %CF84
+
+CF84: ; preds = %CF84, %CF86
+ br i1 undef, label %CF84, label %CF87
+
+CF87: ; preds = %CF84
+ br i1 undef, label %CF78, label %CF82
+
+CF82: ; preds = %CF82, %CF87
+ br i1 undef, label %CF82, label %CF83
+
+CF83: ; preds = %CF82
+ br label %CF
+
+CF: ; preds = %CF80, %CF81, %CF, %CF83
+ br i1 undef, label %CF, label %CF81
+
+CF81: ; preds = %CF
+ %Se = sext <16 x i1> %Cmp to <16 x i16>
+ br i1 undef, label %CF, label %CF80
+
+CF80: ; preds = %CF81
+ br i1 undef, label %CF, label %CF76
+
+CF76: ; preds = %CF76, %CF80
+ %Sl58 = select i1 undef, <16 x i16> %Se, <16 x i16> %Se
+ br label %CF76
+}
+
+define void @autogen_SD1067() {
+BB:
+ %FC = sitofp <4 x i32> zeroinitializer to <4 x ppc_fp128>
+ br label %CF77
+
+CF77: ; preds = %CF77, %BB
+ %brmerge = or i1 false, undef
+ br i1 %brmerge, label %CF77, label %CF85
+
+CF85: ; preds = %CF77
+ %Shuff19 = shufflevector <4 x ppc_fp128> %FC, <4 x ppc_fp128> %FC, <4 x i32> <i32 7, i32 1, i32 3, i32 5>
+ br label %CF75
+
+CF75: ; preds = %CF75, %CF85
+ br label %CF75
+}