diff options
| -rw-r--r-- | include/llvm/Support/StandardPasses.h | 3 | ||||
| -rw-r--r-- | test/FrontendC++/integration-O2.cpp | 19 |
2 files changed, 20 insertions, 2 deletions
diff --git a/include/llvm/Support/StandardPasses.h b/include/llvm/Support/StandardPasses.h index e36f83d43f..d7a3dc059f 100644 --- a/include/llvm/Support/StandardPasses.h +++ b/include/llvm/Support/StandardPasses.h @@ -100,8 +100,7 @@ namespace llvm { if (UnitAtATime) { PM->add(createGlobalOptimizerPass()); // Optimize out global vars PM->add(createGlobalDCEPass()); // Remove unused fns and globs - // IP Constant Propagation - PM->add(createIPConstantPropagationPass()); + PM->add(createIPSCCPPass()); // IP SCCP PM->add(createDeadArgEliminationPass()); // Dead argument elimination } PM->add(createInstructionCombiningPass()); // Clean up after IPCP & DAE diff --git a/test/FrontendC++/integration-O2.cpp b/test/FrontendC++/integration-O2.cpp new file mode 100644 index 0000000000..bb65ac2103 --- /dev/null +++ b/test/FrontendC++/integration-O2.cpp @@ -0,0 +1,19 @@ +// RUN: %llvmgxx %s -O2 -S -o - | FileCheck %s + +// This test verifies that we get expected codegen out of the -O2 optimization +// level from the full optimizer. + + + +// Verify that ipsccp is running and can eliminate globals. +static int test1g = 42; +void test1f1() { + if (test1g == 0) test1g = 0; +} +int test1f2() { + return test1g; +} + +// CHECK: @_Z7test1f2v() +// CHECK: entry: +// CHECK-NEXT: ret i32 42 |