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AArch64/ARM64: print BFM instructions as BFI or BFXIL

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The canonical form of the BFM instruction is always one of the more explicit
extract or insert operations, which makes reading output much easier.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207752 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tim Northover
2014-05-01 12:29:38 +00:00
parent 3ce8291da3
commit f2f35a9ca3
8 changed files with 94 additions and 82 deletions
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35
test/CodeGen/AArch64/bitfield-insert.ll
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@@ -8,10 +8,7 @@
define [1 x i64] @from_clang([1 x i64] %f.coerce, i32 %n) nounwind readnone {
; CHECK-LABEL: from_clang:
; CHECK-AARCH64: bfi w0, w1, #3, #4
; CHECK-ARCH64-NEXT: ret
; CHECK-ARM64: bfm {{w[0-9]+}}, {{w[0-9]+}}, #29, #3
; CHECK: bfi {{w[0-9]+}}, {{w[0-9]+}}, #3, #4
entry:
%f.coerce.fca.0.extract = extractvalue [1 x i64] %f.coerce, 0
@@ -30,8 +27,7 @@ entry:
define void @test_whole32(i32* %existing, i32* %new) {
; CHECK-LABEL: test_whole32:
; CHECK-AARCH64: bfi {{w[0-9]+}}, {{w[0-9]+}}, #26, #5
; CHECK-ARM64: bfm {{w[0-9]+}}, {{w[0-9]+}}, #6, #4
; CHECK: bfi {{w[0-9]+}}, {{w[0-9]+}}, #26, #5
%oldval = load volatile i32* %existing
%oldval_keep = and i32 %oldval, 2214592511 ; =0x83ffffff
@@ -48,8 +44,7 @@ define void @test_whole32(i32* %existing, i32* %new) {
define void @test_whole64(i64* %existing, i64* %new) {
; CHECK-LABEL: test_whole64:
; CHECK-AARCH64: bfi {{x[0-9]+}}, {{x[0-9]+}}, #26, #14
; CHECK-ARM64: bfm {{x[0-9]+}}, {{x[0-9]+}}, #38, #13
; CHECK: bfi {{x[0-9]+}}, {{x[0-9]+}}, #26, #14
; CHECK-NOT: and
; CHECK: ret
@@ -71,7 +66,8 @@ define void @test_whole32_from64(i64* %existing, i64* %new) {
; CHECK-AARCH64: bfi {{w[0-9]+}}, {{w[0-9]+}}, #{{0|16}}, #16
; CHECK-AARCH64-NOT: and
; CHECK-ARM64: bfm {{x[0-9]+}}, {{x[0-9]+}}, #0, #15
; CHECK-ARM64: bfxil {{x[0-9]+}}, {{x[0-9]+}}, #0, #16
; CHECK: ret
@@ -90,11 +86,9 @@ define void @test_whole32_from64(i64* %existing, i64* %new) {
define void @test_32bit_masked(i32 *%existing, i32 *%new) {
; CHECK-LABEL: test_32bit_masked:
; CHECK-AARCH64: bfi [[INSERT:w[0-9]+]], {{w[0-9]+}}, #3, #4
; CHECK-AARCH64: and {{w[0-9]+}}, [[INSERT]], #0xff
; CHECK-ARM64: and
; CHECK-ARM64: bfm {{w[0-9]+}}, {{w[0-9]+}}, #29, #3
; CHECK: bfi [[INSERT:w[0-9]+]], {{w[0-9]+}}, #3, #4
; CHECK-AARCH64: and {{w[0-9]+}}, [[INSERT]], #0xff
%oldval = load volatile i32* %existing
%oldval_keep = and i32 %oldval, 135 ; = 0x87
@@ -111,11 +105,9 @@ define void @test_32bit_masked(i32 *%existing, i32 *%new) {
define void @test_64bit_masked(i64 *%existing, i64 *%new) {
; CHECK-LABEL: test_64bit_masked:
; CHECK-AARCH64: bfi [[INSERT:x[0-9]+]], {{x[0-9]+}}, #40, #8
; CHECK-AARCH64: and {{x[0-9]+}}, [[INSERT]], #0xffff00000000
; CHECK-ARM64: and
; CHECK-ARM64: bfm {{x[0-9]+}}, {{x[0-9]+}}, #24, #7
; CHECK: bfi [[INSERT:x[0-9]+]], {{x[0-9]+}}, #40, #8
; CHECK-AARCH64: and {{x[0-9]+}}, [[INSERT]], #0xffff00000000
%oldval = load volatile i64* %existing
%oldval_keep = and i64 %oldval, 1095216660480 ; = 0xff_0000_0000
@@ -134,11 +126,9 @@ define void @test_64bit_masked(i64 *%existing, i64 *%new) {
define void @test_32bit_complexmask(i32 *%existing, i32 *%new) {
; CHECK-LABEL: test_32bit_complexmask:
; CHECK-AARCH64: bfi {{w[0-9]+}}, {{w[0-9]+}}, #3, #4
; CHECK-AARCH64: and {{w[0-9]+}}, {{w[0-9]+}}, {{w[0-9]+}}
; CHECK-ARM64: and
; CHECK-ARM64: bfm {{w[0-9]+}}, {{w[0-9]+}}, #29, #3
; CHECK: bfi {{w[0-9]+}}, {{w[0-9]+}}, #3, #4
; CHECK-AARCH64: and {{w[0-9]+}}, {{w[0-9]+}}, {{w[0-9]+}}
%oldval = load volatile i32* %existing
%oldval_keep = and i32 %oldval, 647 ; = 0x287
@@ -208,8 +198,7 @@ define void @test_32bit_with_shr(i32* %existing, i32* %new) {
%combined = or i32 %oldval_keep, %newval_masked
store volatile i32 %combined, i32* %existing
; CHECK: lsr [[BIT:w[0-9]+]], {{w[0-9]+}}, #14
; CHECK-AARCH64: bfi {{w[0-9]+}}, [[BIT]], #26, #5
; CHECK-ARM64: bfm {{w[0-9]+}}, [[BIT]], #6, #4
; CHECK: bfi {{w[0-9]+}}, [[BIT]], #26, #5
ret void
}