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

[InstCombine] Add tests for X shift (A srem B) -> X shift (A and B-1) pow2 nonuniform constant vectors

This commit is contained in:
Simon Pilgrim 2020-10-09 14:42:34 +01:00
parent 71d3b7ec7b
commit ccf1260792
1 changed files with 31 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
llvm/test/Transforms/InstCombine/shift.ll
View File

@ -603,6 +603,37 @@ define i32 @test38(i32 %x) nounwind readnone {
ret i32 %shl
}
define <2 x i32> @test38_uniform(<2 x i32> %x) nounwind readnone {
; CHECK-LABEL: @test38_uniform(
; CHECK-NEXT: [[REM1:%.*]] = and <2 x i32> [[X:%.*]], <i32 31, i32 31>
; CHECK-NEXT: [[SHL:%.*]] = shl <2 x i32> <i32 1, i32 1>, [[REM1]]
; CHECK-NEXT: ret <2 x i32> [[SHL]]
;
%rem = srem <2 x i32> %x, <i32 32, i32 32>
%shl = shl <2 x i32> <i32 1, i32 1>, %rem
ret <2 x i32> %shl
}
define <3 x i32> @test38_nonuniform(<3 x i32> %x) nounwind readnone {
; CHECK-LABEL: @test38_nonuniform(
; CHECK-NEXT: [[REM:%.*]] = srem <3 x i32> [[X:%.*]], <i32 32, i32 16, i32 1>
; CHECK-NEXT: [[SHL:%.*]] = shl <3 x i32> <i32 1, i32 1, i32 1>, [[REM]]
; CHECK-NEXT: ret <3 x i32> [[SHL]]
;
%rem = srem <3 x i32> %x, <i32 32, i32 16, i32 1>
%shl = shl <3 x i32> <i32 1, i32 1, i32 1>, %rem
ret <3 x i32> %shl
}
define <2 x i32> @test38_undef(<2 x i32> %x) nounwind readnone {
; CHECK-LABEL: @test38_undef(
; CHECK-NEXT: ret <2 x i32> undef
;
%rem = srem <2 x i32> %x, <i32 32, i32 undef>
%shl = shl <2 x i32> <i32 1, i32 1>, %rem
ret <2 x i32> %shl
}
; <rdar://problem/8756731>
define i8 @test39(i32 %a0) {
; CHECK-LABEL: @test39(