1 ; RUN: opt < %s -indvars -liv-reduce -S | FileCheck %s 2 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 3 target triple = "x86_64-apple-macosx" 4 5 ; CHECK-LABEL: @addwithoverflow 6 ; CHECK-LABEL: loop1: 7 ; CHECK-NOT: zext 8 ; CHECK: add nsw 9 ; CHECK: @llvm.sadd.with.overflow 10 ; CHECK-LABEL: loop2: 11 ; CHECK-NOT: extractvalue 12 ; CHECK: add nuw nsw 13 ; CHECK: @llvm.sadd.with.overflow 14 ; CHECK-LABEL: loop3: 15 ; CHECK-NOT: extractvalue 16 ; CHECK: ret 17 define i64 @addwithoverflow(i32 %n, i64* %a) { 18 entry: 19 br label %loop0 20 21 loop0: 22 %i = phi i32 [ 0, %entry ], [ %i1val, %loop3 ] 23 %s = phi i32 [ 0, %entry ], [ %addsval, %loop3 ] 24 %bc = icmp ult i32 %i, %n 25 br i1 %bc, label %loop1, label %exit 26 27 loop1: 28 %zxt = zext i32 %i to i64 29 %ofs = shl nuw nsw i64 %zxt, 3 30 %gep = getelementptr i64* %a, i64 %zxt 31 %v = load i64* %gep, align 8 32 %truncv = trunc i64 %v to i32 33 %adds = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 %s, i32 %truncv) 34 %ovflows = extractvalue { i32, i1 } %adds, 1 35 br i1 %ovflows, label %exit, label %loop2 36 37 loop2: 38 %addsval = extractvalue { i32, i1 } %adds, 0 39 %i1 = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 %i, i32 1) 40 %i1check = extractvalue { i32, i1 } %i1, 1 41 br i1 %i1check, label %exit, label %loop3 42 43 loop3: 44 %i1val = extractvalue { i32, i1 } %i1, 0 45 %test = icmp slt i32 %i1val, %n 46 br i1 %test, label %return, label %loop0 47 48 return: 49 %ret = zext i32 %addsval to i64 50 ret i64 %ret 51 52 exit: 53 unreachable 54 } 55 56 declare { i32, i1 } @llvm.sadd.with.overflow.i32(i32, i32) 57
