You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
222 lines
5.2 KiB
222 lines
5.2 KiB
; Test memcmp using CLC, with i32 results.
|
|
;
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
|
|
|
|
declare signext i32 @memcmp(i8 *%src1, i8 *%src2, i64 %size)
|
|
|
|
; Zero-length comparisons should be optimized away.
|
|
define i32 @f1(i8 *%src1, i8 *%src2) {
|
|
; CHECK-LABEL: f1:
|
|
; CHECK: lhi %r2, 0
|
|
; CHECK: br %r14
|
|
%res = call i32 @memcmp(i8 *%src1, i8 *%src2, i64 0)
|
|
ret i32 %res
|
|
}
|
|
|
|
; Check a case where the result is used as an integer.
|
|
define i32 @f2(i8 *%src1, i8 *%src2) {
|
|
; CHECK-LABEL: f2:
|
|
; CHECK: clc 0(2,%r2), 0(%r3)
|
|
; CHECK: ipm [[REG:%r[0-5]]]
|
|
; CHECK: srl [[REG]], 28
|
|
; CHECK: rll %r2, [[REG]], 31
|
|
; CHECK: br %r14
|
|
%res = call i32 @memcmp(i8 *%src1, i8 *%src2, i64 2)
|
|
ret i32 %res
|
|
}
|
|
|
|
; Check a case where the result is tested for equality.
|
|
define void @f3(i8 *%src1, i8 *%src2, i32 *%dest) {
|
|
; CHECK-LABEL: f3:
|
|
; CHECK: clc 0(3,%r2), 0(%r3)
|
|
; CHECK-NEXT: ber %r14
|
|
; CHECK: br %r14
|
|
%res = call i32 @memcmp(i8 *%src1, i8 *%src2, i64 3)
|
|
%cmp = icmp eq i32 %res, 0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store i32 0, i32 *%dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
; Check a case where the result is tested for inequality.
|
|
define void @f4(i8 *%src1, i8 *%src2, i32 *%dest) {
|
|
; CHECK-LABEL: f4:
|
|
; CHECK: clc 0(4,%r2), 0(%r3)
|
|
; CHECK-NEXT: blhr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = call i32 @memcmp(i8 *%src1, i8 *%src2, i64 4)
|
|
%cmp = icmp ne i32 %res, 0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store i32 0, i32 *%dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
; Check a case where the result is tested via slt.
|
|
define void @f5(i8 *%src1, i8 *%src2, i32 *%dest) {
|
|
; CHECK-LABEL: f5:
|
|
; CHECK: clc 0(5,%r2), 0(%r3)
|
|
; CHECK-NEXT: blr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = call i32 @memcmp(i8 *%src1, i8 *%src2, i64 5)
|
|
%cmp = icmp slt i32 %res, 0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store i32 0, i32 *%dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
; Check a case where the result is tested for sgt.
|
|
define void @f6(i8 *%src1, i8 *%src2, i32 *%dest) {
|
|
; CHECK-LABEL: f6:
|
|
; CHECK: clc 0(6,%r2), 0(%r3)
|
|
; CHECK-NEXT: bhr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = call i32 @memcmp(i8 *%src1, i8 *%src2, i64 6)
|
|
%cmp = icmp sgt i32 %res, 0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store i32 0, i32 *%dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
; Check the upper end of the CLC range. Here the result is used both as
|
|
; an integer and for branching.
|
|
define i32 @f7(i8 *%src1, i8 *%src2, i32 *%dest) {
|
|
; CHECK-LABEL: f7:
|
|
; CHECK: clc 0(256,%r2), 0(%r3)
|
|
; CHECK: ipm [[REG:%r[0-5]]]
|
|
; CHECK: srl [[REG]], 28
|
|
; CHECK: rll %r2, [[REG]], 31
|
|
; CHECK: blr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = call i32 @memcmp(i8 *%src1, i8 *%src2, i64 256)
|
|
%cmp = icmp slt i32 %res, 0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store i32 0, i32 *%dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret i32 %res
|
|
}
|
|
|
|
; 257 bytes needs two CLCs.
|
|
define i32 @f8(i8 *%src1, i8 *%src2) {
|
|
; CHECK-LABEL: f8:
|
|
; CHECK: clc 0(256,%r2), 0(%r3)
|
|
; CHECK: jlh [[LABEL:\..*]]
|
|
; CHECK: clc 256(1,%r2), 256(%r3)
|
|
; CHECK: [[LABEL]]:
|
|
; CHECK: ipm [[REG:%r[0-5]]]
|
|
; CHECK: br %r14
|
|
%res = call i32 @memcmp(i8 *%src1, i8 *%src2, i64 257)
|
|
ret i32 %res
|
|
}
|
|
|
|
; Test a comparison of 258 bytes in which the CC result can be used directly.
|
|
define void @f9(i8 *%src1, i8 *%src2, i32 *%dest) {
|
|
; CHECK-LABEL: f9:
|
|
; CHECK: clc 0(256,%r2), 0(%r3)
|
|
; CHECK: jlh [[LABEL:\..*]]
|
|
; CHECK: clc 256(1,%r2), 256(%r3)
|
|
; CHECK: [[LABEL]]:
|
|
; CHECK-NEXT: blr %r14
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = call i32 @memcmp(i8 *%src1, i8 *%src2, i64 257)
|
|
%cmp = icmp slt i32 %res, 0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store i32 0, i32 *%dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
; Test the largest size that can use two CLCs.
|
|
define i32 @f10(i8 *%src1, i8 *%src2) {
|
|
; CHECK-LABEL: f10:
|
|
; CHECK: clc 0(256,%r2), 0(%r3)
|
|
; CHECK: jlh [[LABEL:\..*]]
|
|
; CHECK: clc 256(256,%r2), 256(%r3)
|
|
; CHECK: [[LABEL]]:
|
|
; CHECK: ipm [[REG:%r[0-5]]]
|
|
; CHECK: br %r14
|
|
%res = call i32 @memcmp(i8 *%src1, i8 *%src2, i64 512)
|
|
ret i32 %res
|
|
}
|
|
|
|
; Test the smallest size that needs 3 CLCs.
|
|
define i32 @f11(i8 *%src1, i8 *%src2) {
|
|
; CHECK-LABEL: f11:
|
|
; CHECK: clc 0(256,%r2), 0(%r3)
|
|
; CHECK: jlh [[LABEL:\..*]]
|
|
; CHECK: clc 256(256,%r2), 256(%r3)
|
|
; CHECK: jlh [[LABEL]]
|
|
; CHECK: clc 512(1,%r2), 512(%r3)
|
|
; CHECK: [[LABEL]]:
|
|
; CHECK: ipm [[REG:%r[0-5]]]
|
|
; CHECK: br %r14
|
|
%res = call i32 @memcmp(i8 *%src1, i8 *%src2, i64 513)
|
|
ret i32 %res
|
|
}
|
|
|
|
; Test the largest size than can use 3 CLCs.
|
|
define i32 @f12(i8 *%src1, i8 *%src2) {
|
|
; CHECK-LABEL: f12:
|
|
; CHECK: clc 0(256,%r2), 0(%r3)
|
|
; CHECK: jlh [[LABEL:\..*]]
|
|
; CHECK: clc 256(256,%r2), 256(%r3)
|
|
; CHECK: jlh [[LABEL]]
|
|
; CHECK: clc 512(256,%r2), 512(%r3)
|
|
; CHECK: [[LABEL]]:
|
|
; CHECK: ipm [[REG:%r[0-5]]]
|
|
; CHECK: br %r14
|
|
%res = call i32 @memcmp(i8 *%src1, i8 *%src2, i64 768)
|
|
ret i32 %res
|
|
}
|
|
|
|
; The next size up uses a loop instead. We leave the more complicated
|
|
; loop tests to memcpy-01.ll, which shares the same form.
|
|
define i32 @f13(i8 *%src1, i8 *%src2) {
|
|
; CHECK-LABEL: f13:
|
|
; CHECK: lghi [[COUNT:%r[0-5]]], 3
|
|
; CHECK: [[LOOP:.L[^:]*]]:
|
|
; CHECK: clc 0(256,%r2), 0(%r3)
|
|
; CHECK: jlh [[LABEL:\..*]]
|
|
; CHECK-DAG: la %r2, 256(%r2)
|
|
; CHECK-DAG: la %r3, 256(%r3)
|
|
; CHECK: brctg [[COUNT]], [[LOOP]]
|
|
; CHECK: clc 0(1,%r2), 0(%r3)
|
|
; CHECK: [[LABEL]]:
|
|
; CHECK: ipm [[REG:%r[0-5]]]
|
|
; CHECK: br %r14
|
|
%res = call i32 @memcmp(i8 *%src1, i8 *%src2, i64 769)
|
|
ret i32 %res
|
|
}
|