| ; Test 64-bit ordered comparisons that are really between a memory halfword |
| ; and a constant. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| |
| ; Check unsigned comparison near the low end of the CLHHSI range, using zero |
| ; extension. |
| define double @f1(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f1: |
| ; CHECK: clhhsi 0(%r2), 1 |
| ; CHECK-NEXT: bhr %r14 |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = zext i16 %val to i64 |
| %cond = icmp ugt i64 %ext, 1 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check unsigned comparison near the low end of the CLHHSI range, using sign |
| ; extension. |
| define double @f2(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f2: |
| ; CHECK: clhhsi 0(%r2), 1 |
| ; CHECK-NEXT: bhr %r14 |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = sext i16 %val to i64 |
| %cond = icmp ugt i64 %ext, 1 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check unsigned comparison near the high end of the CLHHSI range, using zero |
| ; extension. |
| define double @f3(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f3: |
| ; CHECK: clhhsi 0(%r2), 65534 |
| ; CHECK-NEXT: blr %r14 |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = zext i16 %val to i64 |
| %cond = icmp ult i64 %ext, 65534 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check unsigned comparison near the high end of the CLHHSI range, using sign |
| ; extension. |
| define double @f4(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f4: |
| ; CHECK: clhhsi 0(%r2), 65534 |
| ; CHECK-NEXT: blr %r14 |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = sext i16 %val to i64 |
| %cond = icmp ult i64 %ext, -2 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check unsigned comparison above the high end of the CLHHSI range, using zero |
| ; extension. The condition is always true. |
| define double @f5(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f5: |
| ; CHECK-NOT: clhhsi |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = zext i16 %val to i64 |
| %cond = icmp ult i64 %ext, 65536 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; When using unsigned comparison with sign extension, equality with values |
| ; in the range [32768, MAX-32769] is impossible, and ordered comparisons with |
| ; those values are effectively sign tests. Since such comparisons are |
| ; unlikely to occur in practice, we don't bother optimizing the second case, |
| ; and simply ignore CLHHSI for this range. First check the low end of the |
| ; range. |
| define double @f6(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f6: |
| ; CHECK-NOT: clhhsi |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = sext i16 %val to i64 |
| %cond = icmp ult i64 %ext, 32768 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; ...and then the high end. |
| define double @f7(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f7: |
| ; CHECK-NOT: clhhsi |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = sext i16 %val to i64 |
| %cond = icmp ult i64 %ext, -32769 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check signed comparison near the low end of the CLHHSI range, using zero |
| ; extension. This is equivalent to unsigned comparison. |
| define double @f8(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f8: |
| ; CHECK: clhhsi 0(%r2), 1 |
| ; CHECK-NEXT: bhr %r14 |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = zext i16 %val to i64 |
| %cond = icmp sgt i64 %ext, 1 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check signed comparison near the low end of the CLHHSI range, using sign |
| ; extension. This should use CHHSI instead. |
| define double @f9(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f9: |
| ; CHECK: chhsi 0(%r2), 1 |
| ; CHECK-NEXT: bhr %r14 |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = sext i16 %val to i64 |
| %cond = icmp sgt i64 %ext, 1 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check signed comparison near the high end of the CLHHSI range, using zero |
| ; extension. This is equivalent to unsigned comparison. |
| define double @f10(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f10: |
| ; CHECK: clhhsi 0(%r2), 65534 |
| ; CHECK-NEXT: blr %r14 |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = zext i16 %val to i64 |
| %cond = icmp slt i64 %ext, 65534 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check signed comparison near the high end of the CLHHSI range, using sign |
| ; extension. This should use CHHSI instead. |
| define double @f11(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f11: |
| ; CHECK: chhsi 0(%r2), -2 |
| ; CHECK-NEXT: blr %r14 |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = sext i16 %val to i64 |
| %cond = icmp slt i64 %ext, -2 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check signed comparison above the high end of the CLHHSI range, using zero |
| ; extension. The condition is always true. |
| define double @f12(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f12: |
| ; CHECK-NOT: cli |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = zext i16 %val to i64 |
| %cond = icmp slt i64 %ext, 65536 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check signed comparison near the high end of the CHHSI range, using sign |
| ; extension. |
| define double @f13(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f13: |
| ; CHECK: chhsi 0(%r2), 32766 |
| ; CHECK-NEXT: blr %r14 |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = sext i16 %val to i64 |
| %cond = icmp slt i64 %ext, 32766 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check signed comparison above the high end of the CHHSI range, using sign |
| ; extension. This condition is always true. |
| define double @f14(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f14: |
| ; CHECK-NOT: chhsi |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = sext i16 %val to i64 |
| %cond = icmp slt i64 %ext, 32768 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check signed comparison near the low end of the CHHSI range, using sign |
| ; extension. |
| define double @f15(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f15: |
| ; CHECK: chhsi 0(%r2), -32767 |
| ; CHECK-NEXT: bhr %r14 |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = sext i16 %val to i64 |
| %cond = icmp sgt i64 %ext, -32767 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check signed comparison below the low end of the CHHSI range, using sign |
| ; extension. This condition is always true. |
| define double @f16(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f16: |
| ; CHECK-NOT: chhsi |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = sext i16 %val to i64 |
| %cond = icmp sgt i64 %ext, -32769 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |