| // RUN: %target-swift-frontend -O -emit-ir %s | %FileCheck %s |
| sil_stage canonical |
| |
| import Swift |
| import Builtin |
| |
| // CHECK-LABEL: define{{.*}} swiftcc i64 @test_assume(i64) |
| // CHECK: [[COND:%.*]] = icmp sgt i64 %0, -1 |
| // CHECK: tail call void @llvm.assume(i1 [[COND]]) |
| // CHECK: [[RES:%.*]] = lshr i64 %0, 6 |
| // CHECK: ret i64 [[RES]] |
| // CHECK: } |
| |
| sil @test_assume : $@convention(thin) (Int64) -> Int64 { |
| bb0(%0 : $Int64): |
| %2 = integer_literal $Builtin.Int64, 0 |
| %3 = struct_extract %0 : $Int64, #Int64._value |
| %4 = builtin "cmp_slt_Int64"(%3 : $Builtin.Int64, %2 : $Builtin.Int64) : $Builtin.Int1 |
| %5 = integer_literal $Builtin.Int1, -1 |
| %6 = builtin "xor_Int1"(%4 : $Builtin.Int1, %5 : $Builtin.Int1) : $Builtin.Int1 |
| %7 = builtin "assume_Int1"(%6 : $Builtin.Int1) : $Builtin.Int1 |
| %8 = integer_literal $Builtin.Int64, 64 |
| %9 = builtin "sdiv_Int64"(%3 : $Builtin.Int64, %8 : $Builtin.Int64) : $Builtin.Int64 |
| %10 = struct $Int64 (%9 : $Builtin.Int64) |
| return %10 : $Int64 |
| } |
