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|
; Test 64-bit floating-point comparison. The tests assume a z10 implementation
; of select, using conditional branches rather than LOCGR.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
declare double @foo()
; Check comparison with registers.
define i64 @f1(i64 %a, i64 %b, double %f1, double %f2) {
; CHECK-LABEL: f1:
; CHECK: cdbr %f0, %f2
; CHECK-NEXT: je
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%cond = fcmp oeq double %f1, %f2
%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, double *%ptr) {
; CHECK-LABEL: f2:
; CHECK: cdb %f0, 0(%r4)
; CHECK-NEXT: je
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%f2 = load double , double *%ptr
%cond = fcmp oeq double %f1, %f2
%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, double *%base) {
; CHECK-LABEL: f3:
; CHECK: cdb %f0, 4088(%r4)
; CHECK-NEXT: je
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%ptr = getelementptr double, double *%base, i64 511
%f2 = load double , double *%ptr
%cond = fcmp oeq double %f1, %f2
%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, double *%base) {
; CHECK-LABEL: f4:
; CHECK: aghi %r4, 4096
; CHECK: cdb %f0, 0(%r4)
; CHECK-NEXT: je
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%ptr = getelementptr double, double *%base, i64 512
%f2 = load double , double *%ptr
%cond = fcmp oeq double %f1, %f2
%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, double *%base) {
; CHECK-LABEL: f5:
; CHECK: aghi %r4, -8
; CHECK: cdb %f0, 0(%r4)
; CHECK-NEXT: je
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%ptr = getelementptr double, double *%base, i64 -1
%f2 = load double , double *%ptr
%cond = fcmp oeq double %f1, %f2
%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, double *%base, i64 %index) {
; CHECK-LABEL: f6:
; CHECK: sllg %r1, %r5, 3
; CHECK: cdb %f0, 800(%r1,%r4)
; CHECK-NEXT: je
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%ptr1 = getelementptr double, double *%base, i64 %index
%ptr2 = getelementptr double, double *%ptr1, i64 100
%f2 = load double , double *%ptr2
%cond = fcmp oeq double %f1, %f2
%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(double *%ptr0) {
; CHECK-LABEL: f7:
; CHECK: brasl %r14, foo@PLT
; CHECK: cdb {{%f[0-9]+}}, 160(%r15)
; CHECK: br %r14
%ptr1 = getelementptr double, double *%ptr0, i64 2
%ptr2 = getelementptr double, double *%ptr0, i64 4
%ptr3 = getelementptr double, double *%ptr0, i64 6
%ptr4 = getelementptr double, double *%ptr0, i64 8
%ptr5 = getelementptr double, double *%ptr0, i64 10
%ptr6 = getelementptr double, double *%ptr0, i64 12
%ptr7 = getelementptr double, double *%ptr0, i64 14
%ptr8 = getelementptr double, double *%ptr0, i64 16
%ptr9 = getelementptr double, double *%ptr0, i64 18
%ptr10 = getelementptr double, double *%ptr0, i64 20
%val0 = load double , double *%ptr0
%val1 = load double , double *%ptr1
%val2 = load double , double *%ptr2
%val3 = load double , double *%ptr3
%val4 = load double , double *%ptr4
%val5 = load double , double *%ptr5
%val6 = load double , double *%ptr6
%val7 = load double , double *%ptr7
%val8 = load double , double *%ptr8
%val9 = load double , double *%ptr9
%val10 = load double , double *%ptr10
%ret = call double @foo()
%cmp0 = fcmp olt double %ret, %val0
%cmp1 = fcmp olt double %ret, %val1
%cmp2 = fcmp olt double %ret, %val2
%cmp3 = fcmp olt double %ret, %val3
%cmp4 = fcmp olt double %ret, %val4
%cmp5 = fcmp olt double %ret, %val5
%cmp6 = fcmp olt double %ret, %val6
%cmp7 = fcmp olt double %ret, %val7
%cmp8 = fcmp olt double %ret, %val8
%cmp9 = fcmp olt double %ret, %val9
%cmp10 = fcmp olt double %ret, %val10
%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) {
; CHECK-LABEL: f8:
; CHECK: ltdbr %f0, %f0
; CHECK-NEXT: je
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%cond = fcmp oeq double %f, 0.0
%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, double *%ptr) {
; CHECK-LABEL: f9:
; CHECK: cdb %f0, 0(%r4)
; CHECK-NEXT: jl {{\.L.*}}
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%f1 = load double , double *%ptr
%cond = fcmp ogt double %f1, %f2
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}
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