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; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=generic | FileCheck %s
; Check that we recognize this idiom for rotation too:
; a << (b & (OpSize-1)) | a >> ((0 - b) & (OpSize-1))
define i32 @rotate_left_32(i32 %a, i32 %b) {
; CHECK-LABEL: rotate_left_32:
; CHECK-NOT: and
; CHECK: roll
entry:
%and = and i32 %b, 31
%shl = shl i32 %a, %and
%0 = sub i32 0, %b
%and3 = and i32 %0, 31
%shr = lshr i32 %a, %and3
%or = or i32 %shl, %shr
ret i32 %or
}
define i32 @rotate_right_32(i32 %a, i32 %b) {
; CHECK-LABEL: rotate_right_32:
; CHECK-NOT: and
; CHECK: rorl
entry:
%and = and i32 %b, 31
%shl = lshr i32 %a, %and
%0 = sub i32 0, %b
%and3 = and i32 %0, 31
%shr = shl i32 %a, %and3
%or = or i32 %shl, %shr
ret i32 %or
}
define i64 @rotate_left_64(i64 %a, i64 %b) {
; CHECK-LABEL: rotate_left_64:
; CHECK-NOT: and
; CHECK: rolq
entry:
%and = and i64 %b, 63
%shl = shl i64 %a, %and
%0 = sub i64 0, %b
%and3 = and i64 %0, 63
%shr = lshr i64 %a, %and3
%or = or i64 %shl, %shr
ret i64 %or
}
define i64 @rotate_right_64(i64 %a, i64 %b) {
; CHECK-LABEL: rotate_right_64:
; CHECK-NOT: and
; CHECK: rorq
entry:
%and = and i64 %b, 63
%shl = lshr i64 %a, %and
%0 = sub i64 0, %b
%and3 = and i64 %0, 63
%shr = shl i64 %a, %and3
%or = or i64 %shl, %shr
ret i64 %or
}
; Also check mem operand.
define void @rotate_left_m32(i32 *%pa, i32 %b) {
; CHECK-LABEL: rotate_left_m32:
; CHECK-NOT: and
; CHECK: roll
; no store:
; CHECK-NOT: mov
entry:
%a = load i32* %pa, align 16
%and = and i32 %b, 31
%shl = shl i32 %a, %and
%0 = sub i32 0, %b
%and3 = and i32 %0, 31
%shr = lshr i32 %a, %and3
%or = or i32 %shl, %shr
store i32 %or, i32* %pa, align 32
ret void
}
define void @rotate_right_m32(i32 *%pa, i32 %b) {
; CHECK-LABEL: rotate_right_m32:
; CHECK-NOT: and
; CHECK: rorl
; no store:
; CHECK-NOT: mov
entry:
%a = load i32* %pa, align 16
%and = and i32 %b, 31
%shl = lshr i32 %a, %and
%0 = sub i32 0, %b
%and3 = and i32 %0, 31
%shr = shl i32 %a, %and3
%or = or i32 %shl, %shr
store i32 %or, i32* %pa, align 32
ret void
}
define void @rotate_left_m64(i64 *%pa, i64 %b) {
; CHECK-LABEL: rotate_left_m64:
; CHECK-NOT: and
; CHECK: rolq
; no store:
; CHECK-NOT: mov
entry:
%a = load i64* %pa, align 16
%and = and i64 %b, 63
%shl = shl i64 %a, %and
%0 = sub i64 0, %b
%and3 = and i64 %0, 63
%shr = lshr i64 %a, %and3
%or = or i64 %shl, %shr
store i64 %or, i64* %pa, align 64
ret void
}
define void @rotate_right_m64(i64 *%pa, i64 %b) {
; CHECK-LABEL: rotate_right_m64:
; CHECK-NOT: and
; CHECK: rorq
; no store:
; CHECK-NOT: mov
entry:
%a = load i64* %pa, align 16
%and = and i64 %b, 63
%shl = lshr i64 %a, %and
%0 = sub i64 0, %b
%and3 = and i64 %0, 63
%shr = shl i64 %a, %and3
%or = or i64 %shl, %shr
store i64 %or, i64* %pa, align 64
ret void
}
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