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|
; RUN: llc -mtriple=aarch64-none-linux-gnu < %s | FileCheck %s --check-prefix=CHECK
; First, a simple example from Clang. The registers could plausibly be
; different, but probably won't be.
%struct.foo = type { i8, [2 x i8], i8 }
define [1 x i64] @from_clang([1 x i64] %f.coerce, i32 %n) nounwind readnone {
; CHECK-LABEL: from_clang:
; CHECK: bfi {{w[0-9]+}}, {{w[0-9]+}}, #3, #4
entry:
%f.coerce.fca.0.extract = extractvalue [1 x i64] %f.coerce, 0
%tmp.sroa.0.0.extract.trunc = trunc i64 %f.coerce.fca.0.extract to i32
%bf.value = shl i32 %n, 3
%0 = and i32 %bf.value, 120
%f.sroa.0.0.insert.ext.masked = and i32 %tmp.sroa.0.0.extract.trunc, 135
%1 = or i32 %f.sroa.0.0.insert.ext.masked, %0
%f.sroa.0.0.extract.trunc = zext i32 %1 to i64
%tmp1.sroa.1.1.insert.insert = and i64 %f.coerce.fca.0.extract, 4294967040
%tmp1.sroa.0.0.insert.insert = or i64 %f.sroa.0.0.extract.trunc, %tmp1.sroa.1.1.insert.insert
%.fca.0.insert = insertvalue [1 x i64] undef, i64 %tmp1.sroa.0.0.insert.insert, 0
ret [1 x i64] %.fca.0.insert
}
define void @test_whole32(i32* %existing, i32* %new) {
; CHECK-LABEL: test_whole32:
; CHECK: bfi {{w[0-9]+}}, {{w[0-9]+}}, #26, #5
%oldval = load volatile i32, i32* %existing
%oldval_keep = and i32 %oldval, 2214592511 ; =0x83ffffff
%newval = load volatile i32, i32* %new
%newval_shifted = shl i32 %newval, 26
%newval_masked = and i32 %newval_shifted, 2080374784 ; = 0x7c000000
%combined = or i32 %oldval_keep, %newval_masked
store volatile i32 %combined, i32* %existing
ret void
}
define void @test_whole64(i64* %existing, i64* %new) {
; CHECK-LABEL: test_whole64:
; CHECK: bfi {{x[0-9]+}}, {{x[0-9]+}}, #26, #14
; CHECK-NOT: and
; CHECK: ret
%oldval = load volatile i64, i64* %existing
%oldval_keep = and i64 %oldval, 18446742974265032703 ; = 0xffffff0003ffffffL
%newval = load volatile i64, i64* %new
%newval_shifted = shl i64 %newval, 26
%newval_masked = and i64 %newval_shifted, 1099444518912 ; = 0xfffc000000
%combined = or i64 %oldval_keep, %newval_masked
store volatile i64 %combined, i64* %existing
ret void
}
define void @test_whole32_from64(i64* %existing, i64* %new) {
; CHECK-LABEL: test_whole32_from64:
; CHECK: bfxil {{x[0-9]+}}, {{x[0-9]+}}, #0, #16
; CHECK: ret
%oldval = load volatile i64, i64* %existing
%oldval_keep = and i64 %oldval, 4294901760 ; = 0xffff0000
%newval = load volatile i64, i64* %new
%newval_masked = and i64 %newval, 65535 ; = 0xffff
%combined = or i64 %oldval_keep, %newval_masked
store volatile i64 %combined, i64* %existing
ret void
}
define void @test_32bit_masked(i32 *%existing, i32 *%new) {
; CHECK-LABEL: test_32bit_masked:
; CHECK: and
; CHECK: bfi [[INSERT:w[0-9]+]], {{w[0-9]+}}, #3, #4
%oldval = load volatile i32, i32* %existing
%oldval_keep = and i32 %oldval, 135 ; = 0x87
%newval = load volatile i32, i32* %new
%newval_shifted = shl i32 %newval, 3
%newval_masked = and i32 %newval_shifted, 120 ; = 0x78
%combined = or i32 %oldval_keep, %newval_masked
store volatile i32 %combined, i32* %existing
ret void
}
define void @test_64bit_masked(i64 *%existing, i64 *%new) {
; CHECK-LABEL: test_64bit_masked:
; CHECK: and
; CHECK: bfi [[INSERT:x[0-9]+]], {{x[0-9]+}}, #40, #8
%oldval = load volatile i64, i64* %existing
%oldval_keep = and i64 %oldval, 1095216660480 ; = 0xff_0000_0000
%newval = load volatile i64, i64* %new
%newval_shifted = shl i64 %newval, 40
%newval_masked = and i64 %newval_shifted, 280375465082880 ; = 0xff00_0000_0000
%combined = or i64 %newval_masked, %oldval_keep
store volatile i64 %combined, i64* %existing
ret void
}
; Mask is too complicated for literal ANDwwi, make sure other avenues are tried.
define void @test_32bit_complexmask(i32 *%existing, i32 *%new) {
; CHECK-LABEL: test_32bit_complexmask:
; CHECK: and
; CHECK: bfi {{w[0-9]+}}, {{w[0-9]+}}, #3, #4
%oldval = load volatile i32, i32* %existing
%oldval_keep = and i32 %oldval, 647 ; = 0x287
%newval = load volatile i32, i32* %new
%newval_shifted = shl i32 %newval, 3
%newval_masked = and i32 %newval_shifted, 120 ; = 0x278
%combined = or i32 %oldval_keep, %newval_masked
store volatile i32 %combined, i32* %existing
ret void
}
; Neither mask is is a contiguous set of 1s. BFI can't be used
define void @test_32bit_badmask(i32 *%existing, i32 *%new) {
; CHECK-LABEL: test_32bit_badmask:
; CHECK-NOT: bfi
; CHECK-NOT: bfm
; CHECK: ret
%oldval = load volatile i32, i32* %existing
%oldval_keep = and i32 %oldval, 135 ; = 0x87
%newval = load volatile i32, i32* %new
%newval_shifted = shl i32 %newval, 3
%newval_masked = and i32 %newval_shifted, 632 ; = 0x278
%combined = or i32 %oldval_keep, %newval_masked
store volatile i32 %combined, i32* %existing
ret void
}
; Ditto
define void @test_64bit_badmask(i64 *%existing, i64 *%new) {
; CHECK-LABEL: test_64bit_badmask:
; CHECK-NOT: bfi
; CHECK-NOT: bfm
; CHECK: ret
%oldval = load volatile i64, i64* %existing
%oldval_keep = and i64 %oldval, 135 ; = 0x87
%newval = load volatile i64, i64* %new
%newval_shifted = shl i64 %newval, 3
%newval_masked = and i64 %newval_shifted, 664 ; = 0x278
%combined = or i64 %oldval_keep, %newval_masked
store volatile i64 %combined, i64* %existing
ret void
}
; Bitfield insert where there's a left-over shr needed at the beginning
; (e.g. result of str.bf1 = str.bf2)
define void @test_32bit_with_shr(i32* %existing, i32* %new) {
; CHECK-LABEL: test_32bit_with_shr:
%oldval = load volatile i32, i32* %existing
%oldval_keep = and i32 %oldval, 2214592511 ; =0x83ffffff
%newval = load i32, i32* %new
%newval_shifted = shl i32 %newval, 12
%newval_masked = and i32 %newval_shifted, 2080374784 ; = 0x7c000000
%combined = or i32 %oldval_keep, %newval_masked
store volatile i32 %combined, i32* %existing
; CHECK: lsr [[BIT:w[0-9]+]], {{w[0-9]+}}, #14
; CHECK: bfi {{w[0-9]+}}, [[BIT]], #26, #5
ret void
}
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