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