| ; Test 32-bit equality comparisons that are really between a memory halfword |
| ; and a constant. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| |
| ; Check the low end of the 16-bit unsigned range, with zero extension. |
| define double @f1(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f1: |
| ; CHECK: clhhsi 0(%r2), 0 |
| ; CHECK-NEXT: ber %r14 |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = zext i16 %val to i32 |
| %cond = icmp eq i32 %ext, 0 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check the high end of the 16-bit unsigned range, with zero extension. |
| define double @f2(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f2: |
| ; CHECK: clhhsi 0(%r2), 65535 |
| ; CHECK-NEXT: ber %r14 |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = zext i16 %val to i32 |
| %cond = icmp eq i32 %ext, 65535 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check the next value up, with zero extension. The condition is always false. |
| define double @f3(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f3: |
| ; CHECK-NOT: clhhsi |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = zext i16 %val to i32 |
| %cond = icmp eq i32 %ext, 65536 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check comparisons with -1, with zero extension. |
| ; This condition is also always false. |
| define double @f4(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f4: |
| ; CHECK-NOT: clhhsi |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = zext i16 %val to i32 |
| %cond = icmp eq i32 %ext, -1 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check comparisons with 0, using sign extension. |
| define double @f5(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f5: |
| ; CHECK: clhhsi 0(%r2), 0 |
| ; CHECK-NEXT: ber %r14 |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = sext i16 %val to i32 |
| %cond = icmp eq i32 %ext, 0 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check the high end of the signed 16-bit range, using sign extension. |
| define double @f6(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f6: |
| ; CHECK: clhhsi 0(%r2), 32767 |
| ; CHECK-NEXT: ber %r14 |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = sext i16 %val to i32 |
| %cond = icmp eq i32 %ext, 32767 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check the next value up, using sign extension. |
| ; The condition is always false. |
| 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 i32 |
| %cond = icmp eq i32 %ext, 32768 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check comparisons with -1, using sign extension. |
| define double @f8(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f8: |
| ; CHECK: clhhsi 0(%r2), 65535 |
| ; CHECK-NEXT: ber %r14 |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = sext i16 %val to i32 |
| %cond = icmp eq i32 %ext, -1 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check the low end of the signed 16-bit range, using sign extension. |
| define double @f9(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f9: |
| ; CHECK: clhhsi 0(%r2), 32768 |
| ; CHECK-NEXT: ber %r14 |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = sext i16 %val to i32 |
| %cond = icmp eq i32 %ext, -32768 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Check the next value down, using sign extension. |
| ; The condition is always false. |
| define double @f10(double %a, double %b, ptr %ptr) { |
| ; CHECK-LABEL: f10: |
| ; CHECK-NOT: clhhsi |
| ; CHECK: br %r14 |
| %val = load i16, ptr %ptr |
| %ext = sext i16 %val to i32 |
| %cond = icmp eq i32 %ext, -32769 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |