maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

[InstCombine] add test for umax/umin intrinsic demanded bits; NFC

This commit is contained in:
Sanjay Patel 2021-08-12 12:18:21 -04:00
parent 467525bd07
commit 4b2fd1149d
1 changed files with 44 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
llvm/test/Transforms/InstCombine/minmax-intrinsics.ll
View File

@ -973,3 +973,47 @@ define i8 @smax_uses(i8 %x, i8 %y, i8 %z) {
%m3 = call i8 @llvm.smax.i8(i8 %m1, i8 %m2)
ret i8 %m3
}
define i8 @umax_demand_lshr(i8 %x) {
; CHECK-LABEL: @umax_demand_lshr(
; CHECK-NEXT: [[M:%.*]] = call i8 @llvm.umax.i8(i8 [[X:%.*]], i8 15)
; CHECK-NEXT: [[R:%.*]] = lshr i8 [[M]], 4
; CHECK-NEXT: ret i8 [[R]]
;
%m = call i8 @llvm.umax.i8(i8 %x, i8 15)
%r = lshr i8 %m, 4
ret i8 %r
}
define i8 @umax_demand_and(i8 %x) {
; CHECK-LABEL: @umax_demand_and(
; CHECK-NEXT: [[M:%.*]] = call i8 @llvm.umax.i8(i8 [[X:%.*]], i8 1)
; CHECK-NEXT: [[R:%.*]] = and i8 [[M]], 10
; CHECK-NEXT: ret i8 [[R]]
;
%m = call i8 @llvm.umax.i8(i8 1, i8 %x)
%r = and i8 %m, 10
ret i8 %r
}
define i8 @umin_demand_or_31_30(i8 %x) {
; CHECK-LABEL: @umin_demand_or_31_30(
; CHECK-NEXT: [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[X:%.*]], i8 -30)
; CHECK-NEXT: [[R:%.*]] = or i8 [[M]], 31
; CHECK-NEXT: ret i8 [[R]]
;
%m = call i8 @llvm.umin.i8(i8 -30, i8 %x)
%r = or i8 %m, 31
ret i8 %r
}
define i8 @umin_demand_and_7_8(i8 %x) {
; CHECK-LABEL: @umin_demand_and_7_8(
; CHECK-NEXT: [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[X:%.*]], i8 -7)
; CHECK-NEXT: [[R:%.*]] = and i8 [[M]], -8
; CHECK-NEXT: ret i8 [[R]]
;
%m = call i8 @llvm.umin.i8(i8 %x, i8 -7)
%r = and i8 %m, -8
ret i8 %r
}