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[X86] Added bitreverse tests for non-legal types 

Requested on D21578

llvm-svn: 274914
This commit is contained in:
Simon Pilgrim 2016-07-08 19:48:33 +00:00
parent 811f2b378e
commit aaaeedb8cb
1 changed files with 40 additions and 4 deletions
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44
llvm/test/CodeGen/X86/bitreverse.ll
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@ -5,22 +5,40 @@
declare <2 x i16> @llvm.bitreverse.v2i16(<2 x i16>) readnone
define <2 x i16> @f(<2 x i16> %a) {
; CHECK-LABEL: f:
define <2 x i16> @test_bitreverse_v2i16(<2 x i16> %a) {
; CHECK-LABEL: test_bitreverse_v2i16:
; CHECK: shll
%b = call <2 x i16> @llvm.bitreverse.v2i16(<2 x i16> %a)
ret <2 x i16> %b
}
declare i24 @llvm.bitreverse.i24(i24) readnone
define i24 @test_bitreverse_i24(i24 %a) {
; CHECK-LABEL: test_bitreverse_i24:
; CHECK: shll
%b = call i24 @llvm.bitreverse.i24(i24 %a)
ret i24 %b
}
declare i8 @llvm.bitreverse.i8(i8) readnone
define i8 @g(i8 %a) {
; CHECK-LABEL: g:
define i8 @test_bitreverse_i8(i8 %a) {
; CHECK-LABEL: test_bitreverse_i8:
; CHECK: shlb
%b = call i8 @llvm.bitreverse.i8(i8 %a)
ret i8 %b
}
declare i4 @llvm.bitreverse.i4(i4) readnone
define i4 @test_bitreverse_i4(i4 %a) {
; CHECK-LABEL: test_bitreverse_i4:
; CHECK: shlb
%b = call i4 @llvm.bitreverse.i4(i4 %a)
ret i4 %b
}
; These tests check that bitreverse(constant) calls are folded
define <2 x i16> @fold_v2i16() {
@ -33,6 +51,15 @@ define <2 x i16> @fold_v2i16() {
ret <2 x i16> %b
}
define i24 @fold_i24() {
; CHECK-LABEL: fold_i24:
; CHECK: # BB#0:
; CHECK-NEXT: movl $2048, %eax
; CHECK-NEXT: retl
%b = call i24 @llvm.bitreverse.i24(i24 4096)
ret i24 %b
}
define i8 @fold_i8() {
; CHECK-LABEL: fold_i8:
; CHECK: # BB#0:
@ -42,6 +69,15 @@ define i8 @fold_i8() {
ret i8 %b
}
define i4 @fold_i4() {
; CHECK-LABEL: fold_i4:
; CHECK: # BB#0:
; CHECK-NEXT: movb $1, %al
; CHECK-NEXT: retl
%b = call i4 @llvm.bitreverse.i4(i4 8)
ret i4 %b
}
; These tests check that bitreverse(bitreverse()) calls are removed
define i8 @identity_i8(i8 %a) {