[llvm] r322683 - Add tests for ConstantFoldTerminator preserving DomTree
Matt Arsenault via llvm-commits
llvm-commits at lists.llvm.org
Wed Jan 17 08:27:18 PST 2018
Author: arsenm
Date: Wed Jan 17 08:27:17 2018
New Revision: 322683
URL: http://llvm.org/viewvc/llvm-project?rev=322683&view=rev
Log:
Add tests for ConstantFoldTerminator preserving DomTree
With my bad luck I separately implemented the DomTree preservation
for ConstantFoldTerminator before r322401 was committed. Commit the
tests which I think still provide some value.
Modified:
llvm/trunk/unittests/Transforms/Utils/Local.cpp
Modified: llvm/trunk/unittests/Transforms/Utils/Local.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/unittests/Transforms/Utils/Local.cpp?rev=322683&r1=322682&r2=322683&view=diff
==============================================================================
--- llvm/trunk/unittests/Transforms/Utils/Local.cpp (original)
+++ llvm/trunk/unittests/Transforms/Utils/Local.cpp Wed Jan 17 08:27:17 2018
@@ -212,3 +212,128 @@ TEST(Local, MergeBasicBlockIntoOnlyPred)
EXPECT_TRUE(DT->verify());
});
}
+
+TEST(Local, ConstantFoldTerminator) {
+ LLVMContext C;
+
+ std::unique_ptr<Module> M = parseIR(
+ C,
+ "define void @br_same_dest() {\n"
+ "entry:\n"
+ " br i1 false, label %bb0, label %bb0\n"
+ "bb0:\n"
+ " ret void\n"
+ "}\n"
+ "\n"
+ "define void @br_different_dest() {\n"
+ "entry:\n"
+ " br i1 true, label %bb0, label %bb1\n"
+ "bb0:\n"
+ " br label %exit\n"
+ "bb1:\n"
+ " br label %exit\n"
+ "exit:\n"
+ " ret void\n"
+ "}\n"
+ "\n"
+ "define void @switch_2_different_dest() {\n"
+ "entry:\n"
+ " switch i32 0, label %default [ i32 0, label %bb0 ]\n"
+ "default:\n"
+ " ret void\n"
+ "bb0:\n"
+ " ret void\n"
+ "}\n"
+ "define void @switch_2_different_dest_default() {\n"
+ "entry:\n"
+ " switch i32 1, label %default [ i32 0, label %bb0 ]\n"
+ "default:\n"
+ " ret void\n"
+ "bb0:\n"
+ " ret void\n"
+ "}\n"
+ "define void @switch_3_different_dest() {\n"
+ "entry:\n"
+ " switch i32 0, label %default [ i32 0, label %bb0\n"
+ " i32 1, label %bb1 ]\n"
+ "default:\n"
+ " ret void\n"
+ "bb0:\n"
+ " ret void\n"
+ "bb1:\n"
+ " ret void\n"
+ "}\n"
+ "\n"
+ "define void @switch_variable_2_default_dest(i32 %arg) {\n"
+ "entry:\n"
+ " switch i32 %arg, label %default [ i32 0, label %default ]\n"
+ "default:\n"
+ " ret void\n"
+ "}\n"
+ "\n"
+ "define void @switch_constant_2_default_dest() {\n"
+ "entry:\n"
+ " switch i32 1, label %default [ i32 0, label %default ]\n"
+ "default:\n"
+ " ret void\n"
+ "}\n"
+ "\n"
+ "define void @switch_constant_3_repeated_dest() {\n"
+ "entry:\n"
+ " switch i32 0, label %default [ i32 0, label %bb0\n"
+ " i32 1, label %bb0 ]\n"
+ " bb0:\n"
+ " ret void\n"
+ "default:\n"
+ " ret void\n"
+ "}\n"
+ "\n"
+ "define void @indirectbr() {\n"
+ "entry:\n"
+ " indirectbr i8* blockaddress(@indirectbr, %bb0), [label %bb0, label %bb1]\n"
+ "bb0:\n"
+ " ret void\n"
+ "bb1:\n"
+ " ret void\n"
+ "}\n"
+ "\n"
+ "define void @indirectbr_repeated() {\n"
+ "entry:\n"
+ " indirectbr i8* blockaddress(@indirectbr_repeated, %bb0), [label %bb0, label %bb0]\n"
+ "bb0:\n"
+ " ret void\n"
+ "}\n"
+ "\n"
+ "define void @indirectbr_unreachable() {\n"
+ "entry:\n"
+ " indirectbr i8* blockaddress(@indirectbr_unreachable, %bb0), [label %bb1]\n"
+ "bb0:\n"
+ " ret void\n"
+ "bb1:\n"
+ " ret void\n"
+ "}\n"
+ "\n"
+ );
+
+ auto CFAllTerminators = [&](Function &F, DominatorTree *DT) {
+ DeferredDominance DDT(*DT);
+ for (Function::iterator I = F.begin(), E = F.end(); I != E;) {
+ BasicBlock *BB = &*I++;
+ ConstantFoldTerminator(BB, true, nullptr, &DDT);
+ }
+
+ EXPECT_TRUE(DDT.flush().verify());
+ };
+
+ runWithDomTree(*M, "br_same_dest", CFAllTerminators);
+ runWithDomTree(*M, "br_different_dest", CFAllTerminators);
+ runWithDomTree(*M, "switch_2_different_dest", CFAllTerminators);
+ runWithDomTree(*M, "switch_2_different_dest_default", CFAllTerminators);
+ runWithDomTree(*M, "switch_3_different_dest", CFAllTerminators);
+ runWithDomTree(*M, "switch_variable_2_default_dest", CFAllTerminators);
+ runWithDomTree(*M, "switch_constant_2_default_dest", CFAllTerminators);
+ runWithDomTree(*M, "switch_constant_3_repeated_dest", CFAllTerminators);
+ runWithDomTree(*M, "indirectbr", CFAllTerminators);
+ runWithDomTree(*M, "indirectbr_repeated", CFAllTerminators);
+ runWithDomTree(*M, "indirectbr_unreachable", CFAllTerminators);
+}
More information about the llvm-commits
mailing list