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Add i8 and i64 testing for ctlz on x86. Also simplify the i16 test.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147249 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth 2011-12-24 11:26:59 +00:00
parent e0c643d503
commit 9d2051f7fa
1 changed files with 26 additions and 4 deletions
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30
test/CodeGen/X86/clz.ll
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@ -1,8 +1,10 @@
; RUN: llc < %s -march=x86 -mcpu=yonah | FileCheck %s
; RUN: llc < %s -march=x86-64 -mcpu=yonah | FileCheck %s
declare i32 @llvm.cttz.i32(i32, i1)
declare i8 @llvm.ctlz.i8(i8, i1)
declare i16 @llvm.ctlz.i16(i16, i1)
declare i32 @llvm.ctlz.i32(i32, i1)
declare i64 @llvm.ctlz.i64(i64, i1)
define i32 @cttz_i32(i32 %x) {
%tmp = call i32 @llvm.cttz.i32( i32 %x, i1 true )
@ -13,10 +15,20 @@ define i32 @cttz_i32(i32 %x) {
; CHECK: ret
}
define i16 @ctlz_i16(i16 %x, i16 %y) {
define i8 @ctlz_i8(i8 %x) {
entry:
%tmp1 = add i16 %x, %y
%tmp2 = call i16 @llvm.ctlz.i16( i16 %tmp1, i1 true )
%tmp2 = call i8 @llvm.ctlz.i8( i8 %x, i1 true )
ret i8 %tmp2
; CHECK: ctlz_i8:
; CHECK: bsrl
; CHECK-NOT: cmov
; CHECK: xorl $7,
; CHECK: ret
}
define i16 @ctlz_i16(i16 %x) {
entry:
%tmp2 = call i16 @llvm.ctlz.i16( i16 %x, i1 true )
ret i16 %tmp2
; CHECK: ctlz_i16:
; CHECK: bsrw
@ -35,6 +47,16 @@ define i32 @ctlz_i32(i32 %x) {
; CHECK: ret
}
define i64 @ctlz_i64(i64 %x) {
%tmp = call i64 @llvm.ctlz.i64( i64 %x, i1 true )
ret i64 %tmp
; CHECK: ctlz_i64:
; CHECK: bsrq
; CHECK-NOT: cmov
; CHECK: xorq $63,
; CHECK: ret
}
define i32 @ctlz_i32_cmov(i32 %n) {
entry:
; Generate a cmov to handle zero inputs when necessary.