xref: /aosp_15_r20/external/llvm/test/CodeGen/AArch64/regress-f128csel-flags.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58)

; RUN: llc -mtriple=aarch64-none-linux-gnu -verify-machineinstrs -o - %s | FileCheck %s

; We used to not mark NZCV as being used in the continuation basic-block
; when lowering a 128-bit "select" to branches. This meant a subsequent use
; of the same flags gave an internal fault here.

declare void @foo(fp128)

define double @test_f128csel_flags(i32 %lhs, fp128 %a, fp128 %b) nounwind {
; CHECK: test_f128csel_flags

    %tst = icmp ne i32 %lhs, 42
    %val = select i1 %tst, fp128 %a, fp128 %b
; CHECK: cmp w0, #42
; CHECK: b.eq .LBB0

    call void @foo(fp128 %val)
    %retval = select i1 %tst, double 4.0, double 5.0

    ; It's also reasonably important that the actual fcsel comes before the
    ; function call since bl may corrupt NZCV. We were doing the right thing anyway,
    ; but just as well test it while we're here.
; CHECK: fcsel {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}, ne
; CHECK: bl foo

    ret double %retval
}