diff options
| -rw-r--r-- | llvm/lib/Target/AArch64/AArch64TargetMachine.cpp | 9 | ||||
| -rw-r--r-- | llvm/test/CodeGen/AArch64/a57-csel.ll | 11 |
2 files changed, 19 insertions, 1 deletions
diff --git a/llvm/lib/Target/AArch64/AArch64TargetMachine.cpp b/llvm/lib/Target/AArch64/AArch64TargetMachine.cpp index 2e9bb0cd823..561bb24c6ab 100644 --- a/llvm/lib/Target/AArch64/AArch64TargetMachine.cpp +++ b/llvm/lib/Target/AArch64/AArch64TargetMachine.cpp @@ -59,6 +59,12 @@ EnableAtomicTidy("aarch64-atomic-cfg-tidy", cl::Hidden, " to make use of cmpxchg flow-based information"), cl::init(true)); +static cl::opt<bool> +EnableEarlyIfConversion("aarch64-enable-early-ifcvt", cl::Hidden, + cl::desc("Run early if-conversion"), + cl::init(true)); + + extern "C" void LLVMInitializeAArch64Target() { // Register the target. RegisterTargetMachine<AArch64leTargetMachine> X(TheAArch64leTarget); @@ -174,7 +180,8 @@ bool AArch64PassConfig::addInstSelector() { bool AArch64PassConfig::addILPOpts() { if (EnableCCMP) addPass(createAArch64ConditionalCompares()); - addPass(&EarlyIfConverterID); + if (EnableEarlyIfConversion) + addPass(&EarlyIfConverterID); if (EnableStPairSuppress) addPass(createAArch64StorePairSuppressPass()); return true; diff --git a/llvm/test/CodeGen/AArch64/a57-csel.ll b/llvm/test/CodeGen/AArch64/a57-csel.ll new file mode 100644 index 00000000000..9d16d1a0f10 --- /dev/null +++ b/llvm/test/CodeGen/AArch64/a57-csel.ll @@ -0,0 +1,11 @@ +; RUN: llc -mtriple=aarch64-none-linux-gnu < %s -mcpu=cortex-a57 -aarch64-enable-early-ifcvt=false | FileCheck %s + +; Check that the select is expanded into a branch sequence. +define i64 @f(i64 %a, i64 %b, i64* %c, i64 %d, i64 %e) { + ; CHECK: cbz + %x0 = load i64* %c + %x1 = icmp eq i64 %x0, 0 + %x2 = select i1 %x1, i64 %a, i64 %b + %x3 = add i64 %x2, %d + ret i64 %x3 +} |
