1 ; RUN: llc -verify-machineinstrs -mtriple=aarch64-none-linux-gnu -o - %s | FileCheck %s 2 3 ; Most important point here is that the promotion of the i1 works 4 ; correctly. Previously LLVM thought that i64 was the appropriate SetCC output, 5 ; which meant it proceded in two steps and produced an i64 -> i64 any_ext which 6 ; couldn't be selected and faulted. 7 8 ; It was expecting the smallest legal promotion of i1 to be the preferred SetCC 9 ; type, so we'll satisfy it (this actually arguably gives better code anyway, 10 ; with flag-manipulation operations allowed to use W-registers). 11 12 declare {i64, i1} @llvm.umul.with.overflow.i64(i64, i64) 13 14 define i64 @test_select(i64 %lhs, i64 %rhs) { 15 ; CHECK-LABEL: test_select: 16 17 %res = call {i64, i1} @llvm.umul.with.overflow.i64(i64 %lhs, i64 %rhs) 18 %flag = extractvalue {i64, i1} %res, 1 19 %retval = select i1 %flag, i64 %lhs, i64 %rhs 20 ret i64 %retval 21 ; CHECK: ret 22 } 23
