| ; Test sign extensions from a byte to an i32. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| |
| ; Test register extension, starting with an i32. |
| define i32 @f1(i32 %a) { |
| ; CHECK: f1: |
| ; CHECK: lbr %r2, %r2 |
| ; CHECk: br %r14 |
| %byte = trunc i32 %a to i8 |
| %ext = sext i8 %byte to i32 |
| ret i32 %ext |
| } |
| |
| ; ...and again with an i64. |
| define i32 @f2(i64 %a) { |
| ; CHECK: f2: |
| ; CHECK: lbr %r2, %r2 |
| ; CHECk: br %r14 |
| %byte = trunc i64 %a to i8 |
| %ext = sext i8 %byte to i32 |
| ret i32 %ext |
| } |
| |
| ; Check LB with no displacement. |
| define i32 @f3(i8 *%src) { |
| ; CHECK: f3: |
| ; CHECK: lb %r2, 0(%r2) |
| ; CHECK: br %r14 |
| %byte = load i8 *%src |
| %ext = sext i8 %byte to i32 |
| ret i32 %ext |
| } |
| |
| ; Check the high end of the LB range. |
| define i32 @f4(i8 *%src) { |
| ; CHECK: f4: |
| ; CHECK: lb %r2, 524287(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i8 *%src, i64 524287 |
| %byte = load i8 *%ptr |
| %ext = sext i8 %byte to i32 |
| ret i32 %ext |
| } |
| |
| ; Check the next byte up, which needs separate address logic. |
| ; Other sequences besides this one would be OK. |
| define i32 @f5(i8 *%src) { |
| ; CHECK: f5: |
| ; CHECK: agfi %r2, 524288 |
| ; CHECK: lb %r2, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i8 *%src, i64 524288 |
| %byte = load i8 *%ptr |
| %ext = sext i8 %byte to i32 |
| ret i32 %ext |
| } |
| |
| ; Check the high end of the negative LB range. |
| define i32 @f6(i8 *%src) { |
| ; CHECK: f6: |
| ; CHECK: lb %r2, -1(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i8 *%src, i64 -1 |
| %byte = load i8 *%ptr |
| %ext = sext i8 %byte to i32 |
| ret i32 %ext |
| } |
| |
| ; Check the low end of the LB range. |
| define i32 @f7(i8 *%src) { |
| ; CHECK: f7: |
| ; CHECK: lb %r2, -524288(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i8 *%src, i64 -524288 |
| %byte = load i8 *%ptr |
| %ext = sext i8 %byte to i32 |
| ret i32 %ext |
| } |
| |
| ; Check the next byte down, which needs separate address logic. |
| ; Other sequences besides this one would be OK. |
| define i32 @f8(i8 *%src) { |
| ; CHECK: f8: |
| ; CHECK: agfi %r2, -524289 |
| ; CHECK: lb %r2, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i8 *%src, i64 -524289 |
| %byte = load i8 *%ptr |
| %ext = sext i8 %byte to i32 |
| ret i32 %ext |
| } |
| |
| ; Check that LB allows an index |
| define i32 @f9(i64 %src, i64 %index) { |
| ; CHECK: f9: |
| ; CHECK: lb %r2, 524287(%r3,%r2) |
| ; CHECK: br %r14 |
| %add1 = add i64 %src, %index |
| %add2 = add i64 %add1, 524287 |
| %ptr = inttoptr i64 %add2 to i8 * |
| %byte = load i8 *%ptr |
| %ext = sext i8 %byte to i32 |
| ret i32 %ext |
| } |