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|
; Test STOCGs that are presented as selects.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
declare void @foo(i64 *)
; Test with the loaded value first.
define void @f1(i64 *%ptr, i64 %alt, i32 %limit) {
; CHECK-LABEL: f1:
; CHECK: clfi %r4, 42
; CHECK: stocghe %r3, 0(%r2)
; CHECK: br %r14
%cond = icmp ult i32 %limit, 42
%orig = load i64 , i64 *%ptr
%res = select i1 %cond, i64 %orig, i64 %alt
store i64 %res, i64 *%ptr
ret void
}
; ...and with the loaded value second
define void @f2(i64 *%ptr, i64 %alt, i32 %limit) {
; CHECK-LABEL: f2:
; CHECK: clfi %r4, 42
; CHECK: stocgl %r3, 0(%r2)
; CHECK: br %r14
%cond = icmp ult i32 %limit, 42
%orig = load i64 , i64 *%ptr
%res = select i1 %cond, i64 %alt, i64 %orig
store i64 %res, i64 *%ptr
ret void
}
; Check the high end of the aligned STOCG range.
define void @f3(i64 *%base, i64 %alt, i32 %limit) {
; CHECK-LABEL: f3:
; CHECK: clfi %r4, 42
; CHECK: stocghe %r3, 524280(%r2)
; CHECK: br %r14
%ptr = getelementptr i64, i64 *%base, i64 65535
%cond = icmp ult i32 %limit, 42
%orig = load i64 , i64 *%ptr
%res = select i1 %cond, i64 %orig, i64 %alt
store i64 %res, i64 *%ptr
ret void
}
; Check the next doubleword up. Other sequences besides this one would be OK.
define void @f4(i64 *%base, i64 %alt, i32 %limit) {
; CHECK-LABEL: f4:
; CHECK: agfi %r2, 524288
; CHECK: clfi %r4, 42
; CHECK: stocghe %r3, 0(%r2)
; CHECK: br %r14
%ptr = getelementptr i64, i64 *%base, i64 65536
%cond = icmp ult i32 %limit, 42
%orig = load i64 , i64 *%ptr
%res = select i1 %cond, i64 %orig, i64 %alt
store i64 %res, i64 *%ptr
ret void
}
; Check the low end of the STOCG range.
define void @f5(i64 *%base, i64 %alt, i32 %limit) {
; CHECK-LABEL: f5:
; CHECK: clfi %r4, 42
; CHECK: stocghe %r3, -524288(%r2)
; CHECK: br %r14
%ptr = getelementptr i64, i64 *%base, i64 -65536
%cond = icmp ult i32 %limit, 42
%orig = load i64 , i64 *%ptr
%res = select i1 %cond, i64 %orig, i64 %alt
store i64 %res, i64 *%ptr
ret void
}
; Check the next doubleword down, with the same comments as f4.
define void @f6(i64 *%base, i64 %alt, i32 %limit) {
; CHECK-LABEL: f6:
; CHECK: agfi %r2, -524296
; CHECK: clfi %r4, 42
; CHECK: stocghe %r3, 0(%r2)
; CHECK: br %r14
%ptr = getelementptr i64, i64 *%base, i64 -65537
%cond = icmp ult i32 %limit, 42
%orig = load i64 , i64 *%ptr
%res = select i1 %cond, i64 %orig, i64 %alt
store i64 %res, i64 *%ptr
ret void
}
; Try a frame index base.
define void @f7(i64 %alt, i32 %limit) {
; CHECK-LABEL: f7:
; CHECK: brasl %r14, foo@PLT
; CHECK: stocghe {{%r[0-9]+}}, {{[0-9]+}}(%r15)
; CHECK: brasl %r14, foo@PLT
; CHECK: br %r14
%ptr = alloca i64
call void @foo(i64 *%ptr)
%cond = icmp ult i32 %limit, 42
%orig = load i64 , i64 *%ptr
%res = select i1 %cond, i64 %orig, i64 %alt
store i64 %res, i64 *%ptr
call void @foo(i64 *%ptr)
ret void
}
; Test that conditionally-executed stores do not use STOC, since STOC
; is allowed to trap even when the condition is false.
define void @f8(i64 %a, i64 %b, i64 *%dest) {
; CHECK-LABEL: f8:
; CHECK-NOT: stocg %r3, 0(%r4)
; CHECK: br %r14
entry:
%cmp = icmp ule i64 %a, %b
br i1 %cmp, label %store, label %exit
store:
store i64 %b, i64 *%dest
br label %exit
exit:
ret void
}
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