diff options
| -rw-r--r-- | llvm/lib/Transforms/Scalar/ConstantHoisting.cpp | 3 | ||||
| -rw-r--r-- | llvm/test/CodeGen/X86/constant-hoisting-optnone.ll | 21 |
2 files changed, 24 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/ConstantHoisting.cpp b/llvm/lib/Transforms/Scalar/ConstantHoisting.cpp index b84fe37e6c8..e3aab4b40a0 100644 --- a/llvm/lib/Transforms/Scalar/ConstantHoisting.cpp +++ b/llvm/lib/Transforms/Scalar/ConstantHoisting.cpp @@ -186,6 +186,9 @@ FunctionPass *llvm::createConstantHoistingPass() { /// \brief Perform the constant hoisting optimization for the given function. bool ConstantHoisting::runOnFunction(Function &Fn) { + if (skipOptnoneFunction(Fn)) + return false; + DEBUG(dbgs() << "********** Begin Constant Hoisting **********\n"); DEBUG(dbgs() << "********** Function: " << Fn.getName() << '\n'); diff --git a/llvm/test/CodeGen/X86/constant-hoisting-optnone.ll b/llvm/test/CodeGen/X86/constant-hoisting-optnone.ll new file mode 100644 index 00000000000..f61fe3f60f9 --- /dev/null +++ b/llvm/test/CodeGen/X86/constant-hoisting-optnone.ll @@ -0,0 +1,21 @@ +; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=generic | FileCheck %s +; +; Verify that pass 'Constant Hoisting' is not run on optnone functions. +; Without optnone, Pass 'Constant Hoisting' would firstly hoist +; constant 0xBEEBEEBEC, and then rebase the other constant +; (i.e. constant 0xBEEBEEBF4) with respect to the previous one. +; With optnone, we check that constants are not coalesced. + +define i64 @constant_hoisting_optnone() #0 { +; CHECK-LABEL: @constant_hoisting_optnone +; CHECK-DAG: movabsq {{.*#+}} imm = 0xBEEBEEBF4 +; CHECK-DAG: movabsq {{.*#+}} imm = 0xBEEBEEBEC +; CHECK: ret +entry: + %0 = load i64* inttoptr (i64 51250129900 to i64*) + %1 = load i64* inttoptr (i64 51250129908 to i64*) + %2 = add i64 %0, %1 + ret i64 %2 +} + +attributes #0 = { optnone noinline } |
