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llvm-mirror/test/Other/opt-override-mcpu-mattr.ll
Matt Arsenault a391b3aed6 llc: Change behavior of -mattr with existing attribute
Append this to the existing target-features attribute on the function.

Some flags ignore existing attributes, and some overwrite them. Move
towards consistently respecting existing attributes if present. Since
target features act as a state machine on their own, append to the
function attribute. The backend default added feature list, function
attributes, and -mattr will all be appended together, and the later
features can individually toggle the earlier settings.
2020-01-15 19:46:01 -05:00

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LLVM

; RUN: opt < %s -mtriple=x86_64-apple-darwin -mcpu=broadwell -mattr=+avx2 -S | FileCheck %s
; Check that opt can add but not rewrite function attributes
; target-cpu and target-features using command line options -mcpu and
; -mattr.
; CHECK: attributes #0 = { nounwind readnone ssp uwtable "target-cpu"="broadwell" "target-features"="+ssse3,+cx16,+sse,+sse2,+sse3,+avx2" "use-soft-float"="false" }
; CHECK: attributes #1 = { nounwind readnone ssp uwtable "target-cpu"="core2" "target-features"="+ssse3,+cx16,+sse,+sse2,+sse3,+avx2" "use-soft-float"="false" }
define i32 @no_target_cpu() #0 {
entry:
ret i32 0
}
define i32 @has_targe_cpu() #1 {
entry:
ret i32 0
}
attributes #0 = { nounwind readnone ssp uwtable "target-features"="+ssse3,+cx16,+sse,+sse2,+sse3" "use-soft-float"="false" }
attributes #1 = { nounwind readnone ssp uwtable "target-cpu"="core2" "target-features"="+ssse3,+cx16,+sse,+sse2,+sse3" "use-soft-float"="false" }