| ; Test 32-bit byteswaps from memory to registers. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| |
| declare i32 @llvm.bswap.i32(i32 %a) |
| |
| ; Check LRV with no displacement. |
| define i32 @f1(i32 *%src) { |
| ; CHECK-LABEL: f1: |
| ; CHECK: lrv %r2, 0(%r2) |
| ; CHECK: br %r14 |
| %a = load i32 , i32 *%src |
| %swapped = call i32 @llvm.bswap.i32(i32 %a) |
| ret i32 %swapped |
| } |
| |
| ; Check the high end of the aligned LRV range. |
| define i32 @f2(i32 *%src) { |
| ; CHECK-LABEL: f2: |
| ; CHECK: lrv %r2, 524284(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i32, i32 *%src, i64 131071 |
| %a = load i32 , i32 *%ptr |
| %swapped = call i32 @llvm.bswap.i32(i32 %a) |
| ret i32 %swapped |
| } |
| |
| ; Check the next word up, which needs separate address logic. |
| ; Other sequences besides this one would be OK. |
| define i32 @f3(i32 *%src) { |
| ; CHECK-LABEL: f3: |
| ; CHECK: agfi %r2, 524288 |
| ; CHECK: lrv %r2, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i32, i32 *%src, i64 131072 |
| %a = load i32 , i32 *%ptr |
| %swapped = call i32 @llvm.bswap.i32(i32 %a) |
| ret i32 %swapped |
| } |
| |
| ; Check the high end of the negative aligned LRV range. |
| define i32 @f4(i32 *%src) { |
| ; CHECK-LABEL: f4: |
| ; CHECK: lrv %r2, -4(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i32, i32 *%src, i64 -1 |
| %a = load i32 , i32 *%ptr |
| %swapped = call i32 @llvm.bswap.i32(i32 %a) |
| ret i32 %swapped |
| } |
| |
| ; Check the low end of the LRV range. |
| define i32 @f5(i32 *%src) { |
| ; CHECK-LABEL: f5: |
| ; CHECK: lrv %r2, -524288(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i32, i32 *%src, i64 -131072 |
| %a = load i32 , i32 *%ptr |
| %swapped = call i32 @llvm.bswap.i32(i32 %a) |
| ret i32 %swapped |
| } |
| |
| ; Check the next word down, which needs separate address logic. |
| ; Other sequences besides this one would be OK. |
| define i32 @f6(i32 *%src) { |
| ; CHECK-LABEL: f6: |
| ; CHECK: agfi %r2, -524292 |
| ; CHECK: lrv %r2, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i32, i32 *%src, i64 -131073 |
| %a = load i32 , i32 *%ptr |
| %swapped = call i32 @llvm.bswap.i32(i32 %a) |
| ret i32 %swapped |
| } |
| |
| ; Check that LRV allows an index. |
| define i32 @f7(i64 %src, i64 %index) { |
| ; CHECK-LABEL: f7: |
| ; CHECK: lrv %r2, 524287({{%r3,%r2|%r2,%r3}}) |
| ; CHECK: br %r14 |
| %add1 = add i64 %src, %index |
| %add2 = add i64 %add1, 524287 |
| %ptr = inttoptr i64 %add2 to i32 * |
| %a = load i32 , i32 *%ptr |
| %swapped = call i32 @llvm.bswap.i32(i32 %a) |
| ret i32 %swapped |
| } |
| |
| ; Check that volatile accesses do not use LRV, which might access the |
| ; storage multple times. |
| define i32 @f8(i32 *%src) { |
| ; CHECK-LABEL: f8: |
| ; CHECK: l [[REG:%r[0-5]]], 0(%r2) |
| ; CHECK: lrvr %r2, [[REG]] |
| ; CHECK: br %r14 |
| %a = load volatile i32 , i32 *%src |
| %swapped = call i32 @llvm.bswap.i32(i32 %a) |
| ret i32 %swapped |
| } |
| |
| ; Test a case where we spill the source of at least one LRVR. We want |
| ; to use LRV if possible. |
| define void @f9(i32 *%ptr) { |
| ; CHECK-LABEL: f9: |
| ; CHECK: lrv {{%r[0-9]+}}, 16{{[04]}}(%r15) |
| ; CHECK: br %r14 |
| %val0 = load volatile i32 , i32 *%ptr |
| %val1 = load volatile i32 , i32 *%ptr |
| %val2 = load volatile i32 , i32 *%ptr |
| %val3 = load volatile i32 , i32 *%ptr |
| %val4 = load volatile i32 , i32 *%ptr |
| %val5 = load volatile i32 , i32 *%ptr |
| %val6 = load volatile i32 , i32 *%ptr |
| %val7 = load volatile i32 , i32 *%ptr |
| %val8 = load volatile i32 , i32 *%ptr |
| %val9 = load volatile i32 , i32 *%ptr |
| %val10 = load volatile i32 , i32 *%ptr |
| %val11 = load volatile i32 , i32 *%ptr |
| %val12 = load volatile i32 , i32 *%ptr |
| %val13 = load volatile i32 , i32 *%ptr |
| %val14 = load volatile i32 , i32 *%ptr |
| %val15 = load volatile i32 , i32 *%ptr |
| |
| %swapped0 = call i32 @llvm.bswap.i32(i32 %val0) |
| %swapped1 = call i32 @llvm.bswap.i32(i32 %val1) |
| %swapped2 = call i32 @llvm.bswap.i32(i32 %val2) |
| %swapped3 = call i32 @llvm.bswap.i32(i32 %val3) |
| %swapped4 = call i32 @llvm.bswap.i32(i32 %val4) |
| %swapped5 = call i32 @llvm.bswap.i32(i32 %val5) |
| %swapped6 = call i32 @llvm.bswap.i32(i32 %val6) |
| %swapped7 = call i32 @llvm.bswap.i32(i32 %val7) |
| %swapped8 = call i32 @llvm.bswap.i32(i32 %val8) |
| %swapped9 = call i32 @llvm.bswap.i32(i32 %val9) |
| %swapped10 = call i32 @llvm.bswap.i32(i32 %val10) |
| %swapped11 = call i32 @llvm.bswap.i32(i32 %val11) |
| %swapped12 = call i32 @llvm.bswap.i32(i32 %val12) |
| %swapped13 = call i32 @llvm.bswap.i32(i32 %val13) |
| %swapped14 = call i32 @llvm.bswap.i32(i32 %val14) |
| %swapped15 = call i32 @llvm.bswap.i32(i32 %val15) |
| |
| store volatile i32 %val0, i32 *%ptr |
| store volatile i32 %val1, i32 *%ptr |
| store volatile i32 %val2, i32 *%ptr |
| store volatile i32 %val3, i32 *%ptr |
| store volatile i32 %val4, i32 *%ptr |
| store volatile i32 %val5, i32 *%ptr |
| store volatile i32 %val6, i32 *%ptr |
| store volatile i32 %val7, i32 *%ptr |
| store volatile i32 %val8, i32 *%ptr |
| store volatile i32 %val9, i32 *%ptr |
| store volatile i32 %val10, i32 *%ptr |
| store volatile i32 %val11, i32 *%ptr |
| store volatile i32 %val12, i32 *%ptr |
| store volatile i32 %val13, i32 *%ptr |
| store volatile i32 %val14, i32 *%ptr |
| store volatile i32 %val15, i32 *%ptr |
| |
| store volatile i32 %swapped0, i32 *%ptr |
| store volatile i32 %swapped1, i32 *%ptr |
| store volatile i32 %swapped2, i32 *%ptr |
| store volatile i32 %swapped3, i32 *%ptr |
| store volatile i32 %swapped4, i32 *%ptr |
| store volatile i32 %swapped5, i32 *%ptr |
| store volatile i32 %swapped6, i32 *%ptr |
| store volatile i32 %swapped7, i32 *%ptr |
| store volatile i32 %swapped8, i32 *%ptr |
| store volatile i32 %swapped9, i32 *%ptr |
| store volatile i32 %swapped10, i32 *%ptr |
| store volatile i32 %swapped11, i32 *%ptr |
| store volatile i32 %swapped12, i32 *%ptr |
| store volatile i32 %swapped13, i32 *%ptr |
| store volatile i32 %swapped14, i32 *%ptr |
| store volatile i32 %swapped15, i32 *%ptr |
| |
| ret void |
| } |