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