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1; RUN: llc -verify-machineinstrs -mtriple=aarch64-none-linux-gnu -o - %s | FileCheck %s2 3; Most important point here is that the promotion of the i1 works4; 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 which6; couldn't be selected and faulted.7 8; It was expecting the smallest legal promotion of i1 to be the preferred SetCC9; type, so we'll satisfy it (this actually arguably gives better code anyway,10; with flag-manipulation operations allowed to use W-registers).11 12declare {i64, i1} @llvm.umul.with.overflow.i64(i64, i64)13 14define 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, 119 %retval = select i1 %flag, i64 %lhs, i64 %rhs20 ret i64 %retval21; CHECK: ret22}23