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|
; Test STOCs that are presented as selects.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
declare void @foo(i32 *)
; Test the simple case, with the loaded value first.
define void @f1(i32 *%ptr, i32 %alt, i32 %limit) {
; CHECK-LABEL: f1:
; CHECK: clfi %r4, 42
; CHECK: stoche %r3, 0(%r2)
; CHECK: br %r14
%cond = icmp ult i32 %limit, 42
%orig = load i32 *%ptr
%res = select i1 %cond, i32 %orig, i32 %alt
store i32 %res, i32 *%ptr
ret void
}
; ...and with the loaded value second
define void @f2(i32 *%ptr, i32 %alt, i32 %limit) {
; CHECK-LABEL: f2:
; CHECK: clfi %r4, 42
; CHECK: stocl %r3, 0(%r2)
; CHECK: br %r14
%cond = icmp ult i32 %limit, 42
%orig = load i32 *%ptr
%res = select i1 %cond, i32 %alt, i32 %orig
store i32 %res, i32 *%ptr
ret void
}
; Test cases where the value is explicitly sign-extended to 64 bits, with the
; loaded value first.
define void @f3(i32 *%ptr, i64 %alt, i32 %limit) {
; CHECK-LABEL: f3:
; CHECK: clfi %r4, 42
; CHECK: stoche %r3, 0(%r2)
; CHECK: br %r14
%cond = icmp ult i32 %limit, 42
%orig = load i32 *%ptr
%ext = sext i32 %orig to i64
%res = select i1 %cond, i64 %ext, i64 %alt
%trunc = trunc i64 %res to i32
store i32 %trunc, i32 *%ptr
ret void
}
; ...and with the loaded value second
define void @f4(i32 *%ptr, i64 %alt, i32 %limit) {
; CHECK-LABEL: f4:
; CHECK: clfi %r4, 42
; CHECK: stocl %r3, 0(%r2)
; CHECK: br %r14
%cond = icmp ult i32 %limit, 42
%orig = load i32 *%ptr
%ext = sext i32 %orig to i64
%res = select i1 %cond, i64 %alt, i64 %ext
%trunc = trunc i64 %res to i32
store i32 %trunc, i32 *%ptr
ret void
}
; Test cases where the value is explicitly zero-extended to 32 bits, with the
; loaded value first.
define void @f5(i32 *%ptr, i64 %alt, i32 %limit) {
; CHECK-LABEL: f5:
; CHECK: clfi %r4, 42
; CHECK: stoche %r3, 0(%r2)
; CHECK: br %r14
%cond = icmp ult i32 %limit, 42
%orig = load i32 *%ptr
%ext = zext i32 %orig to i64
%res = select i1 %cond, i64 %ext, i64 %alt
%trunc = trunc i64 %res to i32
store i32 %trunc, i32 *%ptr
ret void
}
; ...and with the loaded value second
define void @f6(i32 *%ptr, i64 %alt, i32 %limit) {
; CHECK-LABEL: f6:
; CHECK: clfi %r4, 42
; CHECK: stocl %r3, 0(%r2)
; CHECK: br %r14
%cond = icmp ult i32 %limit, 42
%orig = load i32 *%ptr
%ext = zext i32 %orig to i64
%res = select i1 %cond, i64 %alt, i64 %ext
%trunc = trunc i64 %res to i32
store i32 %trunc, i32 *%ptr
ret void
}
; Check the high end of the aligned STOC range.
define void @f7(i32 *%base, i32 %alt, i32 %limit) {
; CHECK-LABEL: f7:
; CHECK: clfi %r4, 42
; CHECK: stoche %r3, 524284(%r2)
; CHECK: br %r14
%ptr = getelementptr i32 *%base, i64 131071
%cond = icmp ult i32 %limit, 42
%orig = load i32 *%ptr
%res = select i1 %cond, i32 %orig, i32 %alt
store i32 %res, i32 *%ptr
ret void
}
; Check the next word up. Other sequences besides this one would be OK.
define void @f8(i32 *%base, i32 %alt, i32 %limit) {
; CHECK-LABEL: f8:
; CHECK: agfi %r2, 524288
; CHECK: clfi %r4, 42
; CHECK: stoche %r3, 0(%r2)
; CHECK: br %r14
%ptr = getelementptr i32 *%base, i64 131072
%cond = icmp ult i32 %limit, 42
%orig = load i32 *%ptr
%res = select i1 %cond, i32 %orig, i32 %alt
store i32 %res, i32 *%ptr
ret void
}
; Check the low end of the STOC range.
define void @f9(i32 *%base, i32 %alt, i32 %limit) {
; CHECK-LABEL: f9:
; CHECK: clfi %r4, 42
; CHECK: stoche %r3, -524288(%r2)
; CHECK: br %r14
%ptr = getelementptr i32 *%base, i64 -131072
%cond = icmp ult i32 %limit, 42
%orig = load i32 *%ptr
%res = select i1 %cond, i32 %orig, i32 %alt
store i32 %res, i32 *%ptr
ret void
}
; Check the next word down, with the same comments as f8.
define void @f10(i32 *%base, i32 %alt, i32 %limit) {
; CHECK-LABEL: f10:
; CHECK: agfi %r2, -524292
; CHECK: clfi %r4, 42
; CHECK: stoche %r3, 0(%r2)
; CHECK: br %r14
%ptr = getelementptr i32 *%base, i64 -131073
%cond = icmp ult i32 %limit, 42
%orig = load i32 *%ptr
%res = select i1 %cond, i32 %orig, i32 %alt
store i32 %res, i32 *%ptr
ret void
}
; Try a frame index base.
define void @f11(i32 %alt, i32 %limit) {
; CHECK-LABEL: f11:
; CHECK: brasl %r14, foo@PLT
; CHECK: stoche {{%r[0-9]+}}, {{[0-9]+}}(%r15)
; CHECK: brasl %r14, foo@PLT
; CHECK: br %r14
%ptr = alloca i32
call void @foo(i32 *%ptr)
%cond = icmp ult i32 %limit, 42
%orig = load i32 *%ptr
%res = select i1 %cond, i32 %orig, i32 %alt
store i32 %res, i32 *%ptr
call void @foo(i32 *%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 @f12(i32 %a, i32 %b, i32 *%dest) {
; CHECK-LABEL: f12:
; CHECK-NOT: stoc
; CHECK: br %r14
entry:
%cmp = icmp ule i32 %a, %b
br i1 %cmp, label %store, label %exit
store:
store i32 %b, i32 *%dest
br label %exit
exit:
ret void
}
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