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