| ; Test 64-bit floating-point strict comparison. The tests assume a z10 | |
| ; implementation of select, using conditional branches rather than LOCGR. | |
| ; | |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 \ | |
| ; RUN: | FileCheck -check-prefix=CHECK -check-prefix=CHECK-SCALAR %s | |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 -verify-machineinstrs\ | |
| ; RUN: | FileCheck -check-prefix=CHECK -check-prefix=CHECK-VECTOR %s | |
| declare double @foo() | |
| ; Check comparison with registers. | |
| define i64 @f1(i64 %a, i64 %b, double %f1, double %f2) #0 { | |
| ; CHECK-LABEL: f1: | |
| ; CHECK: cdbr %f0, %f2 | |
| ; CHECK-SCALAR-NEXT: ber %r14 | |
| ; CHECK-SCALAR: lgr %r2, %r3 | |
| ; CHECK-VECTOR-NEXT: locgrne %r2, %r3 | |
| ; CHECK: br %r14 | |
| %cond = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %f1, double %f2, | |
| metadata !"oeq", | |
| metadata !"fpexcept.strict") #0 | |
| %res = select i1 %cond, i64 %a, i64 %b | |
| ret i64 %res | |
| } | |
| ; Check the low end of the CDB range. | |
| define i64 @f2(i64 %a, i64 %b, double %f1, ptr %ptr) #0 { | |
| ; CHECK-LABEL: f2: | |
| ; CHECK: cdb %f0, 0(%r4) | |
| ; CHECK-SCALAR-NEXT: ber %r14 | |
| ; CHECK-SCALAR: lgr %r2, %r3 | |
| ; CHECK-VECTOR-NEXT: locgrne %r2, %r3 | |
| ; CHECK: br %r14 | |
| %f2 = load double, ptr %ptr | |
| %cond = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %f1, double %f2, | |
| metadata !"oeq", | |
| metadata !"fpexcept.strict") #0 | |
| %res = select i1 %cond, i64 %a, i64 %b | |
| ret i64 %res | |
| } | |
| ; Check the high end of the aligned CDB range. | |
| define i64 @f3(i64 %a, i64 %b, double %f1, ptr %base) #0 { | |
| ; CHECK-LABEL: f3: | |
| ; CHECK: cdb %f0, 4088(%r4) | |
| ; CHECK-SCALAR-NEXT: ber %r14 | |
| ; CHECK-SCALAR: lgr %r2, %r3 | |
| ; CHECK-VECTOR-NEXT: locgrne %r2, %r3 | |
| ; CHECK: br %r14 | |
| %ptr = getelementptr double, ptr %base, i64 511 | |
| %f2 = load double, ptr %ptr | |
| %cond = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %f1, double %f2, | |
| metadata !"oeq", | |
| metadata !"fpexcept.strict") #0 | |
| %res = select i1 %cond, i64 %a, i64 %b | |
| ret i64 %res | |
| } | |
| ; Check the next doubleword up, which needs separate address logic. | |
| ; Other sequences besides this one would be OK. | |
| define i64 @f4(i64 %a, i64 %b, double %f1, ptr %base) #0 { | |
| ; CHECK-LABEL: f4: | |
| ; CHECK: aghi %r4, 4096 | |
| ; CHECK: cdb %f0, 0(%r4) | |
| ; CHECK-SCALAR-NEXT: ber %r14 | |
| ; CHECK-SCALAR: lgr %r2, %r3 | |
| ; CHECK-VECTOR-NEXT: locgrne %r2, %r3 | |
| ; CHECK: br %r14 | |
| %ptr = getelementptr double, ptr %base, i64 512 | |
| %f2 = load double, ptr %ptr | |
| %cond = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %f1, double %f2, | |
| metadata !"oeq", | |
| metadata !"fpexcept.strict") #0 | |
| %res = select i1 %cond, i64 %a, i64 %b | |
| ret i64 %res | |
| } | |
| ; Check negative displacements, which also need separate address logic. | |
| define i64 @f5(i64 %a, i64 %b, double %f1, ptr %base) #0 { | |
| ; CHECK-LABEL: f5: | |
| ; CHECK: aghi %r4, -8 | |
| ; CHECK: cdb %f0, 0(%r4) | |
| ; CHECK-SCALAR-NEXT: ber %r14 | |
| ; CHECK-SCALAR: lgr %r2, %r3 | |
| ; CHECK-VECTOR-NEXT: locgrne %r2, %r3 | |
| ; CHECK: br %r14 | |
| %ptr = getelementptr double, ptr %base, i64 -1 | |
| %f2 = load double, ptr %ptr | |
| %cond = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %f1, double %f2, | |
| metadata !"oeq", | |
| metadata !"fpexcept.strict") #0 | |
| %res = select i1 %cond, i64 %a, i64 %b | |
| ret i64 %res | |
| } | |
| ; Check that CDB allows indices. | |
| define i64 @f6(i64 %a, i64 %b, double %f1, ptr %base, i64 %index) #0 { | |
| ; CHECK-LABEL: f6: | |
| ; CHECK: sllg %r1, %r5, 3 | |
| ; CHECK: cdb %f0, 800(%r1,%r4) | |
| ; CHECK-SCALAR-NEXT: ber %r14 | |
| ; CHECK-SCALAR: lgr %r2, %r3 | |
| ; CHECK-VECTOR-NEXT: locgrne %r2, %r3 | |
| ; CHECK: br %r14 | |
| %ptr1 = getelementptr double, ptr %base, i64 %index | |
| %ptr2 = getelementptr double, ptr %ptr1, i64 100 | |
| %f2 = load double, ptr %ptr2 | |
| %cond = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %f1, double %f2, | |
| metadata !"oeq", | |
| metadata !"fpexcept.strict") #0 | |
| %res = select i1 %cond, i64 %a, i64 %b | |
| ret i64 %res | |
| } | |
| ; Check that comparisons of spilled values can use CDB rather than CDBR. | |
| define double @f7(ptr %ptr0) #0 { | |
| ; CHECK-LABEL: f7: | |
| ; CHECK: brasl %r14, foo@PLT | |
| ; CHECK-SCALAR: cdb {{%f[0-9]+}}, 160(%r15) | |
| ; CHECK: br %r14 | |
| %ptr1 = getelementptr double, ptr %ptr0, i64 2 | |
| %ptr2 = getelementptr double, ptr %ptr0, i64 4 | |
| %ptr3 = getelementptr double, ptr %ptr0, i64 6 | |
| %ptr4 = getelementptr double, ptr %ptr0, i64 8 | |
| %ptr5 = getelementptr double, ptr %ptr0, i64 10 | |
| %ptr6 = getelementptr double, ptr %ptr0, i64 12 | |
| %ptr7 = getelementptr double, ptr %ptr0, i64 14 | |
| %ptr8 = getelementptr double, ptr %ptr0, i64 16 | |
| %ptr9 = getelementptr double, ptr %ptr0, i64 18 | |
| %ptr10 = getelementptr double, ptr %ptr0, i64 20 | |
| %val0 = load double, ptr %ptr0 | |
| %val1 = load double, ptr %ptr1 | |
| %val2 = load double, ptr %ptr2 | |
| %val3 = load double, ptr %ptr3 | |
| %val4 = load double, ptr %ptr4 | |
| %val5 = load double, ptr %ptr5 | |
| %val6 = load double, ptr %ptr6 | |
| %val7 = load double, ptr %ptr7 | |
| %val8 = load double, ptr %ptr8 | |
| %val9 = load double, ptr %ptr9 | |
| %val10 = load double, ptr %ptr10 | |
| %ret = call double @foo() #0 | |
| %cmp0 = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %ret, double %val0, | |
| metadata !"olt", | |
| metadata !"fpexcept.strict") #0 | |
| %cmp1 = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %ret, double %val1, | |
| metadata !"olt", | |
| metadata !"fpexcept.strict") #0 | |
| %cmp2 = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %ret, double %val2, | |
| metadata !"olt", | |
| metadata !"fpexcept.strict") #0 | |
| %cmp3 = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %ret, double %val3, | |
| metadata !"olt", | |
| metadata !"fpexcept.strict") #0 | |
| %cmp4 = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %ret, double %val4, | |
| metadata !"olt", | |
| metadata !"fpexcept.strict") #0 | |
| %cmp5 = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %ret, double %val5, | |
| metadata !"olt", | |
| metadata !"fpexcept.strict") #0 | |
| %cmp6 = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %ret, double %val6, | |
| metadata !"olt", | |
| metadata !"fpexcept.strict") #0 | |
| %cmp7 = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %ret, double %val7, | |
| metadata !"olt", | |
| metadata !"fpexcept.strict") #0 | |
| %cmp8 = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %ret, double %val8, | |
| metadata !"olt", | |
| metadata !"fpexcept.strict") #0 | |
| %cmp9 = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %ret, double %val9, | |
| metadata !"olt", | |
| metadata !"fpexcept.strict") #0 | |
| %cmp10 = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %ret, double %val10, | |
| metadata !"olt", | |
| metadata !"fpexcept.strict") #0 | |
| %sel0 = select i1 %cmp0, double %ret, double 0.0 | |
| %sel1 = select i1 %cmp1, double %sel0, double 1.0 | |
| %sel2 = select i1 %cmp2, double %sel1, double 2.0 | |
| %sel3 = select i1 %cmp3, double %sel2, double 3.0 | |
| %sel4 = select i1 %cmp4, double %sel3, double 4.0 | |
| %sel5 = select i1 %cmp5, double %sel4, double 5.0 | |
| %sel6 = select i1 %cmp6, double %sel5, double 6.0 | |
| %sel7 = select i1 %cmp7, double %sel6, double 7.0 | |
| %sel8 = select i1 %cmp8, double %sel7, double 8.0 | |
| %sel9 = select i1 %cmp9, double %sel8, double 9.0 | |
| %sel10 = select i1 %cmp10, double %sel9, double 10.0 | |
| ret double %sel10 | |
| } | |
| ; Check comparison with zero. | |
| define i64 @f8(i64 %a, i64 %b, double %f) #0 { | |
| ; CHECK-LABEL: f8: | |
| ; CHECK-SCALAR: ltdbr %f0, %f0 | |
| ; CHECK-SCALAR-NEXT: ber %r14 | |
| ; CHECK-SCALAR: lgr %r2, %r3 | |
| ; CHECK-VECTOR: ltdbr %f0, %f0 | |
| ; CHECK-VECTOR-NEXT: locgrne %r2, %r3 | |
| ; CHECK: br %r14 | |
| %cond = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %f, double 0.0, | |
| metadata !"oeq", | |
| metadata !"fpexcept.strict") #0 | |
| %res = select i1 %cond, i64 %a, i64 %b | |
| ret i64 %res | |
| } | |
| ; Check the comparison can be reversed if that allows CDB to be used, | |
| define i64 @f9(i64 %a, i64 %b, double %f2, ptr %ptr) #0 { | |
| ; CHECK-LABEL: f9: | |
| ; CHECK: cdb %f0, 0(%r4) | |
| ; CHECK-SCALAR-NEXT: blr %r14 | |
| ; CHECK-SCALAR: lgr %r2, %r3 | |
| ; CHECK-VECTOR-NEXT: locgrnl %r2, %r3 | |
| ; CHECK: br %r14 | |
| %f1 = load double, ptr %ptr | |
| %cond = call i1 @llvm.experimental.constrained.fcmp.f64( | |
| double %f1, double %f2, | |
| metadata !"ogt", | |
| metadata !"fpexcept.strict") #0 | |
| %res = select i1 %cond, i64 %a, i64 %b | |
| ret i64 %res | |
| } | |
| attributes #0 = { strictfp } | |
| declare i1 @llvm.experimental.constrained.fcmp.f64(double, double, metadata, metadata) | |