149 lines
4.0 KiB
LLVM
149 lines
4.0 KiB
LLVM
; Test LOC.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
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; Run the test again to make sure it still works the same even
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; in the presence of the load-store-on-condition-2 facility.
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
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declare i32 @foo(i32 *)
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; Test the simple case.
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define i32 @f1(i32 %easy, i32 *%ptr, i32 %limit) {
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; CHECK-LABEL: f1:
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; CHECK: clfi %r4, 42
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; CHECK: loche %r2, 0(%r3)
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; CHECK: br %r14
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%cond = icmp ult i32 %limit, 42
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%other = load i32, i32 *%ptr
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%res = select i1 %cond, i32 %easy, i32 %other
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ret i32 %res
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}
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; ...and again with the operands swapped.
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define i32 @f2(i32 %easy, i32 *%ptr, i32 %limit) {
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; CHECK-LABEL: f2:
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; CHECK: clfi %r4, 42
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; CHECK: locl %r2, 0(%r3)
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; CHECK: br %r14
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%cond = icmp ult i32 %limit, 42
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%other = load i32, i32 *%ptr
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%res = select i1 %cond, i32 %other, i32 %easy
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ret i32 %res
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}
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; Check the high end of the aligned LOC range.
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define i32 @f3(i32 %easy, i32 *%base, i32 %limit) {
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; CHECK-LABEL: f3:
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; CHECK: clfi %r4, 42
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; CHECK: loche %r2, 524284(%r3)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%base, i64 131071
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%cond = icmp ult i32 %limit, 42
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%other = load i32, i32 *%ptr
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%res = select i1 %cond, i32 %easy, i32 %other
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ret i32 %res
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}
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; Check the next word up. Other sequences besides this one would be OK.
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define i32 @f4(i32 %easy, i32 *%base, i32 %limit) {
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; CHECK-LABEL: f4:
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; CHECK: agfi %r3, 524288
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; CHECK: clfi %r4, 42
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; CHECK: loche %r2, 0(%r3)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%base, i64 131072
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%cond = icmp ult i32 %limit, 42
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%other = load i32, i32 *%ptr
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%res = select i1 %cond, i32 %easy, i32 %other
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ret i32 %res
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}
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; Check the low end of the LOC range.
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define i32 @f5(i32 %easy, i32 *%base, i32 %limit) {
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; CHECK-LABEL: f5:
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; CHECK: clfi %r4, 42
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; CHECK: loche %r2, -524288(%r3)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%base, i64 -131072
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%cond = icmp ult i32 %limit, 42
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%other = load i32, i32 *%ptr
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%res = select i1 %cond, i32 %easy, i32 %other
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ret i32 %res
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}
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; Check the next word down, with the same comments as f4.
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define i32 @f6(i32 %easy, i32 *%base, i32 %limit) {
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; CHECK-LABEL: f6:
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; CHECK: agfi %r3, -524292
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; CHECK: clfi %r4, 42
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; CHECK: loche %r2, 0(%r3)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%base, i64 -131073
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%cond = icmp ult i32 %limit, 42
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%other = load i32, i32 *%ptr
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%res = select i1 %cond, i32 %easy, i32 %other
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ret i32 %res
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}
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; Try a frame index base.
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define i32 @f7(i32 %alt, i32 %limit) {
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; CHECK-LABEL: f7:
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; CHECK: brasl %r14, foo@PLT
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; CHECK: loche %r2, {{[0-9]+}}(%r15)
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; CHECK: br %r14
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%ptr = alloca i32
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%easy = call i32 @foo(i32 *%ptr)
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%cond = icmp ult i32 %limit, 42
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%other = load i32, i32 *%ptr
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%res = select i1 %cond, i32 %easy, i32 %other
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ret i32 %res
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}
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; Try a case when an index is involved.
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define i32 @f8(i32 %easy, i32 %limit, i64 %base, i64 %index) {
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; CHECK-LABEL: f8:
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; CHECK: clfi %r3, 42
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; CHECK: loche %r2, 0({{%r[1-5]}})
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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 i32 *
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%cond = icmp ult i32 %limit, 42
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%other = load i32, i32 *%ptr
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%res = select i1 %cond, i32 %easy, i32 %other
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ret i32 %res
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}
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; Test that conditionally-executed loads do not use LOC, since it is allowed
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; to trap even when the condition is false.
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define i32 @f9(i32 %easy, i32 %limit, i32 *%ptr) {
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; CHECK-LABEL: f9:
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; CHECK-NOT: loc
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; CHECK: br %r14
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entry:
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%cmp = icmp ule i32 %easy, %limit
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br i1 %cmp, label %load, label %exit
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load:
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%other = load i32, i32 *%ptr
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br label %exit
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exit:
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%res = phi i32 [ %easy, %entry ], [ %other, %load ]
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ret i32 %res
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}
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; Test that volatile loads do not use LOC, since if the condition is false,
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; it is unspecified whether or not the load happens. LOCR is fine though.
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define i32 @f10(i32 %easy, i32 *%ptr, i32 %limit) {
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; CHECK-LABEL: f10:
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; CHECK: l {{%r[0-9]*}}, 0(%r3)
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; CHECK: locr
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; CHECK: br %r14
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%cond = icmp ult i32 %limit, 42
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%other = load volatile i32, i32 *%ptr
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%res = select i1 %cond, i32 %easy, i32 %other
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ret i32 %res
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}
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