diff options
| -rw-r--r-- | llvm/lib/Transforms/Utils/Mem2Reg.cpp | 3 | ||||
| -rw-r--r-- | llvm/test/Transforms/Mem2Reg/optnone.ll | 21 |
2 files changed, 24 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Utils/Mem2Reg.cpp b/llvm/lib/Transforms/Utils/Mem2Reg.cpp index 00cf4e6c01c..aa1e35ddba0 100644 --- a/llvm/lib/Transforms/Utils/Mem2Reg.cpp +++ b/llvm/lib/Transforms/Utils/Mem2Reg.cpp @@ -63,6 +63,9 @@ bool PromotePass::runOnFunction(Function &F) { BasicBlock &BB = F.getEntryBlock(); // Get the entry node for the function + if (F.hasFnAttribute(Attribute::OptimizeNone)) + return false; + bool Changed = false; DominatorTree &DT = getAnalysis<DominatorTreeWrapperPass>().getDomTree(); diff --git a/llvm/test/Transforms/Mem2Reg/optnone.ll b/llvm/test/Transforms/Mem2Reg/optnone.ll new file mode 100644 index 00000000000..41ee77aff79 --- /dev/null +++ b/llvm/test/Transforms/Mem2Reg/optnone.ll @@ -0,0 +1,21 @@ +; RUN: opt < %s -mem2reg -S | FileCheck %s + +; This function is optnone, so the allocas should not be eliminated. + +; CHECK-LABEL: @testfunc +; CHECK: alloca +; CHECK: alloca +define double @testfunc(i32 %i, double %j) optnone noinline { + %I = alloca i32 ; <i32*> [#uses=4] + %J = alloca double ; <double*> [#uses=2] + store i32 %i, i32* %I + store double %j, double* %J + %t1 = load i32, i32* %I ; <i32> [#uses=1] + %t2 = add i32 %t1, 1 ; <i32> [#uses=1] + store i32 %t2, i32* %I + %t3 = load i32, i32* %I ; <i32> [#uses=1] + %t4 = sitofp i32 %t3 to double ; <double> [#uses=1] + %t5 = load double, double* %J ; <double> [#uses=1] + %t6 = fmul double %t4, %t5 ; <double> [#uses=1] + ret double %t6 +} |
