| ; Test sign extensions from a halfword to an i64. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| |
| ; Test register extension, starting with an i32. |
| define i64 @f1(i64 %a) { |
| ; CHECK-LABEL: f1: |
| ; CHECK: lghr %r2, %r2 |
| ; CHECK: br %r14 |
| %half = trunc i64 %a to i16 |
| %ext = sext i16 %half to i64 |
| ret i64 %ext |
| } |
| |
| ; ...and again with an i64. |
| define i64 @f2(i32 %a) { |
| ; CHECK-LABEL: f2: |
| ; CHECK: lghr %r2, %r2 |
| ; CHECK: br %r14 |
| %half = trunc i32 %a to i16 |
| %ext = sext i16 %half to i64 |
| ret i64 %ext |
| } |
| |
| ; Check LGH with no displacement. |
| define i64 @f3(ptr %src) { |
| ; CHECK-LABEL: f3: |
| ; CHECK: lgh %r2, 0(%r2) |
| ; CHECK: br %r14 |
| %half = load i16, ptr %src |
| %ext = sext i16 %half to i64 |
| ret i64 %ext |
| } |
| |
| ; Check the high end of the LGH range. |
| define i64 @f4(ptr %src) { |
| ; CHECK-LABEL: f4: |
| ; CHECK: lgh %r2, 524286(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i16, ptr %src, i64 262143 |
| %half = load i16, ptr %ptr |
| %ext = sext i16 %half to i64 |
| ret i64 %ext |
| } |
| |
| ; Check the next halfword up, which needs separate address logic. |
| ; Other sequences besides this one would be OK. |
| define i64 @f5(ptr %src) { |
| ; CHECK-LABEL: f5: |
| ; CHECK: agfi %r2, 524288 |
| ; CHECK: lgh %r2, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i16, ptr %src, i64 262144 |
| %half = load i16, ptr %ptr |
| %ext = sext i16 %half to i64 |
| ret i64 %ext |
| } |
| |
| ; Check the high end of the negative LGH range. |
| define i64 @f6(ptr %src) { |
| ; CHECK-LABEL: f6: |
| ; CHECK: lgh %r2, -2(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i16, ptr %src, i64 -1 |
| %half = load i16, ptr %ptr |
| %ext = sext i16 %half to i64 |
| ret i64 %ext |
| } |
| |
| ; Check the low end of the LGH range. |
| define i64 @f7(ptr %src) { |
| ; CHECK-LABEL: f7: |
| ; CHECK: lgh %r2, -524288(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i16, ptr %src, i64 -262144 |
| %half = load i16, ptr %ptr |
| %ext = sext i16 %half to i64 |
| ret i64 %ext |
| } |
| |
| ; Check the next halfword down, which needs separate address logic. |
| ; Other sequences besides this one would be OK. |
| define i64 @f8(ptr %src) { |
| ; CHECK-LABEL: f8: |
| ; CHECK: agfi %r2, -524290 |
| ; CHECK: lgh %r2, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i16, ptr %src, i64 -262145 |
| %half = load i16, ptr %ptr |
| %ext = sext i16 %half to i64 |
| ret i64 %ext |
| } |
| |
| ; Check that LGH allows an index. |
| define i64 @f9(i64 %src, i64 %index) { |
| ; CHECK-LABEL: f9: |
| ; CHECK: lgh %r2, 524287(%r3,%r2) |
| ; CHECK: br %r14 |
| %add1 = add i64 %src, %index |
| %add2 = add i64 %add1, 524287 |
| %ptr = inttoptr i64 %add2 to ptr |
| %half = load i16, ptr %ptr |
| %ext = sext i16 %half to i64 |
| ret i64 %ext |
| } |
| |
| ; Test a case where we spill the source of at least one LGHR. We want |
| ; to use LGH if possible. |
| define void @f10(ptr %ptr) { |
| ; CHECK-LABEL: f10: |
| ; CHECK: lgh {{%r[0-9]+}}, 198(%r15) |
| ; CHECK: br %r14 |
| %val0 = load volatile i64, ptr %ptr |
| %val1 = load volatile i64, ptr %ptr |
| %val2 = load volatile i64, ptr %ptr |
| %val3 = load volatile i64, ptr %ptr |
| %val4 = load volatile i64, ptr %ptr |
| %val5 = load volatile i64, ptr %ptr |
| %val6 = load volatile i64, ptr %ptr |
| %val7 = load volatile i64, ptr %ptr |
| %val8 = load volatile i64, ptr %ptr |
| %val9 = load volatile i64, ptr %ptr |
| %val10 = load volatile i64, ptr %ptr |
| %val11 = load volatile i64, ptr %ptr |
| %val12 = load volatile i64, ptr %ptr |
| %val13 = load volatile i64, ptr %ptr |
| %val14 = load volatile i64, ptr %ptr |
| %val15 = load volatile i64, ptr %ptr |
| |
| %trunc0 = trunc i64 %val0 to i16 |
| %trunc1 = trunc i64 %val1 to i16 |
| %trunc2 = trunc i64 %val2 to i16 |
| %trunc3 = trunc i64 %val3 to i16 |
| %trunc4 = trunc i64 %val4 to i16 |
| %trunc5 = trunc i64 %val5 to i16 |
| %trunc6 = trunc i64 %val6 to i16 |
| %trunc7 = trunc i64 %val7 to i16 |
| %trunc8 = trunc i64 %val8 to i16 |
| %trunc9 = trunc i64 %val9 to i16 |
| %trunc10 = trunc i64 %val10 to i16 |
| %trunc11 = trunc i64 %val11 to i16 |
| %trunc12 = trunc i64 %val12 to i16 |
| %trunc13 = trunc i64 %val13 to i16 |
| %trunc14 = trunc i64 %val14 to i16 |
| %trunc15 = trunc i64 %val15 to i16 |
| |
| %ext0 = sext i16 %trunc0 to i64 |
| %ext1 = sext i16 %trunc1 to i64 |
| %ext2 = sext i16 %trunc2 to i64 |
| %ext3 = sext i16 %trunc3 to i64 |
| %ext4 = sext i16 %trunc4 to i64 |
| %ext5 = sext i16 %trunc5 to i64 |
| %ext6 = sext i16 %trunc6 to i64 |
| %ext7 = sext i16 %trunc7 to i64 |
| %ext8 = sext i16 %trunc8 to i64 |
| %ext9 = sext i16 %trunc9 to i64 |
| %ext10 = sext i16 %trunc10 to i64 |
| %ext11 = sext i16 %trunc11 to i64 |
| %ext12 = sext i16 %trunc12 to i64 |
| %ext13 = sext i16 %trunc13 to i64 |
| %ext14 = sext i16 %trunc14 to i64 |
| %ext15 = sext i16 %trunc15 to i64 |
| |
| store volatile i64 %val0, ptr %ptr |
| store volatile i64 %val1, ptr %ptr |
| store volatile i64 %val2, ptr %ptr |
| store volatile i64 %val3, ptr %ptr |
| store volatile i64 %val4, ptr %ptr |
| store volatile i64 %val5, ptr %ptr |
| store volatile i64 %val6, ptr %ptr |
| store volatile i64 %val7, ptr %ptr |
| store volatile i64 %val8, ptr %ptr |
| store volatile i64 %val9, ptr %ptr |
| store volatile i64 %val10, ptr %ptr |
| store volatile i64 %val11, ptr %ptr |
| store volatile i64 %val12, ptr %ptr |
| store volatile i64 %val13, ptr %ptr |
| store volatile i64 %val14, ptr %ptr |
| store volatile i64 %val15, ptr %ptr |
| |
| store volatile i64 %ext0, ptr %ptr |
| store volatile i64 %ext1, ptr %ptr |
| store volatile i64 %ext2, ptr %ptr |
| store volatile i64 %ext3, ptr %ptr |
| store volatile i64 %ext4, ptr %ptr |
| store volatile i64 %ext5, ptr %ptr |
| store volatile i64 %ext6, ptr %ptr |
| store volatile i64 %ext7, ptr %ptr |
| store volatile i64 %ext8, ptr %ptr |
| store volatile i64 %ext9, ptr %ptr |
| store volatile i64 %ext10, ptr %ptr |
| store volatile i64 %ext11, ptr %ptr |
| store volatile i64 %ext12, ptr %ptr |
| store volatile i64 %ext13, ptr %ptr |
| store volatile i64 %ext14, ptr %ptr |
| store volatile i64 %ext15, ptr %ptr |
| |
| ret void |
| } |