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231 lines
5.7 KiB
LLVM
231 lines
5.7 KiB
LLVM
; Test insertions of memory into the low byte of an i64.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; Check a plain insertion with (or (and ... -0xff) (zext (load ....))).
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; The whole sequence can be performed by IC.
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define i64 @f1(i64 %orig, i8 *%ptr) {
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; CHECK-LABEL: f1:
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; CHECK-NOT: ni
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; CHECK: ic %r2, 0(%r3)
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; CHECK: br %r14
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%val = load i8, i8 *%ptr
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%ptr2 = zext i8 %val to i64
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%ptr1 = and i64 %orig, -256
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%or = or i64 %ptr1, %ptr2
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ret i64 %or
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}
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; Like f1, but with the operands reversed.
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define i64 @f2(i64 %orig, i8 *%ptr) {
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; CHECK-LABEL: f2:
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; CHECK-NOT: ni
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; CHECK: ic %r2, 0(%r3)
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; CHECK: br %r14
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%val = load i8, i8 *%ptr
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%ptr2 = zext i8 %val to i64
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%ptr1 = and i64 %orig, -256
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%or = or i64 %ptr2, %ptr1
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ret i64 %or
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}
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; Check a case where more bits than lower 8 are masked out of the
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; register value. We can use IC but must keep the original mask.
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define i64 @f3(i64 %orig, i8 *%ptr) {
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; CHECK-LABEL: f3:
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; CHECK: nill %r2, 65024
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; CHECK: ic %r2, 0(%r3)
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; CHECK: br %r14
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%val = load i8, i8 *%ptr
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%ptr2 = zext i8 %val to i64
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%ptr1 = and i64 %orig, -512
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%or = or i64 %ptr1, %ptr2
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ret i64 %or
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}
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; Like f3, but with the operands reversed.
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define i64 @f4(i64 %orig, i8 *%ptr) {
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; CHECK-LABEL: f4:
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; CHECK: nill %r2, 65024
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; CHECK: ic %r2, 0(%r3)
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; CHECK: br %r14
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%val = load i8, i8 *%ptr
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%ptr2 = zext i8 %val to i64
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%ptr1 = and i64 %orig, -512
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%or = or i64 %ptr2, %ptr1
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ret i64 %or
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}
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; Check a case where the low 8 bits are cleared by a shift left.
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define i64 @f5(i64 %orig, i8 *%ptr) {
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; CHECK-LABEL: f5:
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; CHECK: sllg %r2, %r2, 8
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; CHECK: ic %r2, 0(%r3)
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; CHECK: br %r14
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%val = load i8, i8 *%ptr
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%ptr2 = zext i8 %val to i64
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%ptr1 = shl i64 %orig, 8
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%or = or i64 %ptr1, %ptr2
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ret i64 %or
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}
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; Like f5, but with the operands reversed.
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define i64 @f6(i64 %orig, i8 *%ptr) {
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; CHECK-LABEL: f6:
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; CHECK: sllg %r2, %r2, 8
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; CHECK: ic %r2, 0(%r3)
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; CHECK: br %r14
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%val = load i8, i8 *%ptr
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%ptr2 = zext i8 %val to i64
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%ptr1 = shl i64 %orig, 8
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%or = or i64 %ptr2, %ptr1
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ret i64 %or
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}
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; Check insertions into a constant.
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define i64 @f7(i64 %orig, i8 *%ptr) {
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; CHECK-LABEL: f7:
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; CHECK: lghi %r2, 256
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; CHECK: ic %r2, 0(%r3)
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; CHECK: br %r14
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%val = load i8, i8 *%ptr
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%ptr2 = zext i8 %val to i64
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%or = or i64 %ptr2, 256
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ret i64 %or
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}
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; Like f7, but with the operands reversed.
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define i64 @f8(i64 %orig, i8 *%ptr) {
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; CHECK-LABEL: f8:
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; CHECK: lghi %r2, 256
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; CHECK: ic %r2, 0(%r3)
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; CHECK: br %r14
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%val = load i8, i8 *%ptr
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%ptr2 = zext i8 %val to i64
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%or = or i64 256, %ptr2
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ret i64 %or
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}
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; Check the high end of the IC range.
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define i64 @f9(i64 %orig, i8 *%src) {
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; CHECK-LABEL: f9:
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; CHECK: ic %r2, 4095(%r3)
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; CHECK: br %r14
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%ptr = getelementptr i8, i8 *%src, i64 4095
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%val = load i8, i8 *%ptr
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%src2 = zext i8 %val to i64
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%src1 = and i64 %orig, -256
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%or = or i64 %src2, %src1
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ret i64 %or
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}
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; Check the next byte up, which should use ICY instead of IC.
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define i64 @f10(i64 %orig, i8 *%src) {
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; CHECK-LABEL: f10:
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; CHECK: icy %r2, 4096(%r3)
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; CHECK: br %r14
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%ptr = getelementptr i8, i8 *%src, i64 4096
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%val = load i8, i8 *%ptr
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%src2 = zext i8 %val to i64
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%src1 = and i64 %orig, -256
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%or = or i64 %src2, %src1
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ret i64 %or
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}
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; Check the high end of the ICY range.
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define i64 @f11(i64 %orig, i8 *%src) {
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; CHECK-LABEL: f11:
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; CHECK: icy %r2, 524287(%r3)
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; CHECK: br %r14
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%ptr = getelementptr i8, i8 *%src, i64 524287
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%val = load i8, i8 *%ptr
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%src2 = zext i8 %val to i64
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%src1 = and i64 %orig, -256
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%or = or i64 %src2, %src1
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ret i64 %or
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}
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; Check the next byte up, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define i64 @f12(i64 %orig, i8 *%src) {
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; CHECK-LABEL: f12:
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; CHECK: agfi %r3, 524288
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; CHECK: ic %r2, 0(%r3)
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; CHECK: br %r14
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%ptr = getelementptr i8, i8 *%src, i64 524288
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%val = load i8, i8 *%ptr
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%src2 = zext i8 %val to i64
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%src1 = and i64 %orig, -256
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%or = or i64 %src2, %src1
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ret i64 %or
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}
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; Check the high end of the negative ICY range.
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define i64 @f13(i64 %orig, i8 *%src) {
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; CHECK-LABEL: f13:
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; CHECK: icy %r2, -1(%r3)
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; CHECK: br %r14
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%ptr = getelementptr i8, i8 *%src, i64 -1
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%val = load i8, i8 *%ptr
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%src2 = zext i8 %val to i64
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%src1 = and i64 %orig, -256
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%or = or i64 %src2, %src1
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ret i64 %or
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}
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; Check the low end of the ICY range.
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define i64 @f14(i64 %orig, i8 *%src) {
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; CHECK-LABEL: f14:
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; CHECK: icy %r2, -524288(%r3)
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; CHECK: br %r14
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%ptr = getelementptr i8, i8 *%src, i64 -524288
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%val = load i8, i8 *%ptr
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%src2 = zext i8 %val to i64
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%src1 = and i64 %orig, -256
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%or = or i64 %src2, %src1
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ret i64 %or
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}
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; Check the next byte down, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define i64 @f15(i64 %orig, i8 *%src) {
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; CHECK-LABEL: f15:
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; CHECK: agfi %r3, -524289
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; CHECK: ic %r2, 0(%r3)
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; CHECK: br %r14
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%ptr = getelementptr i8, i8 *%src, i64 -524289
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%val = load i8, i8 *%ptr
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%src2 = zext i8 %val to i64
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%src1 = and i64 %orig, -256
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%or = or i64 %src2, %src1
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ret i64 %or
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}
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; Check that IC allows an index.
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define i64 @f16(i64 %orig, i8 *%src, i64 %index) {
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; CHECK-LABEL: f16:
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; CHECK: ic %r2, 4095({{%r4,%r3|%r3,%r4}})
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; CHECK: br %r14
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%ptr1 = getelementptr i8, i8 *%src, i64 %index
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%ptr2 = getelementptr i8, i8 *%ptr1, i64 4095
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%val = load i8, i8 *%ptr2
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%src2 = zext i8 %val to i64
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%src1 = and i64 %orig, -256
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%or = or i64 %src2, %src1
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ret i64 %or
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}
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; Check that ICY allows an index.
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define i64 @f17(i64 %orig, i8 *%src, i64 %index) {
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; CHECK-LABEL: f17:
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; CHECK: icy %r2, 4096({{%r4,%r3|%r3,%r4}})
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; CHECK: br %r14
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%ptr1 = getelementptr i8, i8 *%src, i64 %index
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%ptr2 = getelementptr i8, i8 *%ptr1, i64 4096
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%val = load i8, i8 *%ptr2
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%src2 = zext i8 %val to i64
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%src1 = and i64 %orig, -256
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%or = or i64 %src2, %src1
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ret i64 %or
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}
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