RPCS3/llvm
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm.git synced 2024-12-15 07:59:57 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

[x86] add more tests for select --> sbb transform; NFC

Browse Source 
These are siblings of the tests added with r306032.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@306064 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sanjay Patel 2017-06-22 22:17:05 +00:00
parent f2891bee47
commit d6dbca43aa
1 changed files with 61 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

65
test/CodeGen/X86/sbb.ll
View File

@ -30,7 +30,7 @@ define i16 @i16_select_0_or_neg1_as_math(i16 %x) {
ret i16 %add
}
; (X !== 0) ? -1 : 0 --> 0 - (X != 0)
; (X != 0) ? -1 : 0 --> 0 - (X != 0)
define i32 @i32_select_0_or_neg1_commuted(i32 %x) {
; CHECK-LABEL: i32_select_0_or_neg1_commuted:
@ -43,7 +43,7 @@ define i32 @i32_select_0_or_neg1_commuted(i32 %x) {
ret i32 %sel
}
; (X !== 0) ? -1 : 0 --> 0 - (X != 0)
; (X != 0) ? -1 : 0 --> 0 - (X != 0)
define i64 @i64_select_0_or_neg1_commuted_as_math(i64 %x) {
; CHECK-LABEL: i64_select_0_or_neg1_commuted_as_math:
@ -53,7 +53,64 @@ define i64 @i64_select_0_or_neg1_commuted_as_math(i64 %x) {
; CHECK-NEXT: retq
%cmp = icmp ne i64 %x, 0
%ext = zext i1 %cmp to i64
%add = sub i64 0, %ext
ret i64 %add
%sub = sub i64 0, %ext
ret i64 %sub
}
; (X == 0) ? -1 : 0 --> 0 - (X == 0)
define i64 @i64_select_neg1_or_0(i64 %x) {
; CHECK-LABEL: i64_select_neg1_or_0:
; CHECK: # BB#0:
; CHECK-NEXT: cmpq $1, %rdi
; CHECK-NEXT: sbbq %rax, %rax
; CHECK-NEXT: retq
%cmp = icmp eq i64 %x, 0
%sel = select i1 %cmp, i64 -1, i64 0
ret i64 %sel
}
; (X == 0) ? -1 : 0 --> 0 - (X == 0)
define i32 @i32_select_neg1_or_0_as_math(i32 %x) {
; CHECK-LABEL: i32_select_neg1_or_0_as_math:
; CHECK: # BB#0:
; CHECK-NEXT: xorl %eax, %eax
; CHECK-NEXT: cmpl $1, %edi
; CHECK-NEXT: sbbl $0, %eax
; CHECK-NEXT: retq
%cmp = icmp eq i32 %x, 0
%ext = zext i1 %cmp to i32
%sub = sub i32 0, %ext
ret i32 %sub
}
; (X != 0) ? 0 : -1 --> (X != 0) - 1
define i16 @i16_select_neg1_or_0_commuted(i16 %x) {
; CHECK-LABEL: i16_select_neg1_or_0_commuted:
; CHECK: # BB#0:
; CHECK-NEXT: cmpw $1, %di
; CHECK-NEXT: movw $-1, %ax
; CHECK-NEXT: sbbw $-1, %ax
; CHECK-NEXT: retq
%cmp = icmp ne i16 %x, 0
%sel = select i1 %cmp, i16 0, i16 -1
ret i16 %sel
}
; (X != 0) ? 0 : -1 --> (X != 0) - 1
define i8 @i8_select_neg1_or_0_commuted_as_math(i8 %x) {
; CHECK-LABEL: i8_select_neg1_or_0_commuted_as_math:
; CHECK: # BB#0:
; CHECK-NEXT: cmpb $1, %dil
; CHECK-NEXT: movb $-1, %al
; CHECK-NEXT: sbbb $-1, %al
; CHECK-NEXT: retq
%cmp = icmp ne i8 %x, 0
%ext = zext i1 %cmp to i8
%add = add i8 %ext, -1
ret i8 %add
}