forked from OSchip/llvm-project
140 lines
3.8 KiB
LLVM
140 lines
3.8 KiB
LLVM
; Test 64-bit unsigned comparisons between memory and a constant.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; Check ordered comparisons with a constant near the low end of the unsigned
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; 16-bit range.
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define double @f1(double %a, double %b, i64 *%ptr) {
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; CHECK-LABEL: f1:
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; CHECK: clghsi 0(%r2), 2
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%val = load i64 , i64 *%ptr
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%cond = icmp ult i64 %val, 2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check ordered comparisons with the high end of the unsigned 16-bit range.
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define double @f2(double %a, double %b, i64 *%ptr) {
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; CHECK-LABEL: f2:
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; CHECK: clghsi 0(%r2), 65535
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%val = load i64 , i64 *%ptr
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%cond = icmp ult i64 %val, 65535
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the next value up, which can't use CLGHSI.
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define double @f3(double %a, double %b, i64 *%ptr) {
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; CHECK-LABEL: f3:
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; CHECK-NOT: clghsi
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; CHECK: br %r14
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%val = load i64 , i64 *%ptr
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%cond = icmp ult i64 %val, 65536
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check equality comparisons with 32768, the lowest value for which
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; we prefer CLGHSI to CGHSI.
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define double @f4(double %a, double %b, i64 *%ptr) {
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; CHECK-LABEL: f4:
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; CHECK: clghsi 0(%r2), 32768
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; CHECK-NEXT: je
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%val = load i64 , i64 *%ptr
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%cond = icmp eq i64 %val, 32768
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check equality comparisons with the high end of the unsigned 16-bit range.
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define double @f5(double %a, double %b, i64 *%ptr) {
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; CHECK-LABEL: f5:
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; CHECK: clghsi 0(%r2), 65535
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; CHECK-NEXT: je
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%val = load i64 , i64 *%ptr
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%cond = icmp eq i64 %val, 65535
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the next value up, which can't use CLGHSI.
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define double @f6(double %a, double %b, i64 *%ptr) {
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; CHECK-LABEL: f6:
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; CHECK-NOT: clghsi
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; CHECK: br %r14
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%val = load i64 , i64 *%ptr
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%cond = icmp eq i64 %val, 65536
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the high end of the CLGHSI range.
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define double @f7(double %a, double %b, i64 %i1, i64 *%base) {
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; CHECK-LABEL: f7:
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; CHECK: clghsi 4088(%r3), 2
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%ptr = getelementptr i64, i64 *%base, i64 511
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%val = load i64 , i64 *%ptr
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%cond = icmp ult i64 %val, 2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the next doubleword up, which needs separate address logic,
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define double @f8(double %a, double %b, i64 *%base) {
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; CHECK-LABEL: f8:
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; CHECK: aghi %r2, 4096
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; CHECK: clghsi 0(%r2), 2
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%ptr = getelementptr i64, i64 *%base, i64 512
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%val = load i64 , i64 *%ptr
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%cond = icmp ult i64 %val, 2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check negative offsets, which also need separate address logic.
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define double @f9(double %a, double %b, i64 *%base) {
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; CHECK-LABEL: f9:
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; CHECK: aghi %r2, -8
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; CHECK: clghsi 0(%r2), 2
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%ptr = getelementptr i64, i64 *%base, i64 -1
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%val = load i64 , i64 *%ptr
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%cond = icmp ult i64 %val, 2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check that CLGHSI does not allow indices.
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define double @f10(double %a, double %b, i64 %base, i64 %index) {
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; CHECK-LABEL: f10:
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; CHECK: agr {{%r2, %r3|%r3, %r2}}
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; CHECK: clghsi 0({{%r[23]}}), 2
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%add = add i64 %base, %index
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%ptr = inttoptr i64 %add to i64 *
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%val = load i64 , i64 *%ptr
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%cond = icmp ult i64 %val, 2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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