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; Test load-and-trap instructions (LFHAT)
; See comments in asm-18.ll about testing high-word operations.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=zEC12 \
; RUN: -no-integrated-as | FileCheck %s
declare void @llvm.trap()
; Check LAT with no displacement.
define void @f1(ptr %ptr) {
; CHECK-LABEL: f1:
; CHECK: lfhat [[REG:%r[0-9]+]], 0(%r2)
; CHECK: stepa [[REG]]
; CHECK: br %r14
entry:
%val = load i32, ptr %ptr
%cmp = icmp eq i32 %val, 0
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
tail call void @llvm.trap()
unreachable
if.end: ; preds = %entry
call void asm sideeffect "stepa $0", "h"(i32 %val)
ret void;
}
; Check the high end of the LAT range.
define void @f2(ptr %src) {
; CHECK-LABEL: f2:
; CHECK: lfhat [[REG:%r[0-9]+]], 524284(%r2)
; CHECK: stepa [[REG]]
; CHECK: br %r14
%ptr = getelementptr i32, ptr %src, i64 131071
%val = load i32, ptr %ptr
%cmp = icmp eq i32 %val, 0
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
tail call void @llvm.trap()
unreachable
if.end: ; preds = %entry
call void asm sideeffect "stepa $0", "h"(i32 %val)
ret void;
}
; Check the next word up, which needs separate address logic.
; Other sequences besides this one would be OK.
define void @f3(ptr %src) {
; CHECK-LABEL: f3:
; CHECK: agfi %r2, 524288
; CHECK: lfhat [[REG:%r[0-9]+]], 0(%r2)
; CHECK: stepa [[REG]]
; CHECK: br %r14
%ptr = getelementptr i32, ptr %src, i64 131072
%val = load i32, ptr %ptr
%cmp = icmp eq i32 %val, 0
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
tail call void @llvm.trap()
unreachable
if.end: ; preds = %entry
call void asm sideeffect "stepa $0", "h"(i32 %val)
ret void;
}
; Check that LAT allows an index.
define void @f4(i64 %src, i64 %index) {
; CHECK-LABEL: f4:
; CHECK: lfhat [[REG:%r[0-9]+]], 524287(%r3,%r2)
; CHECK: stepa [[REG]]
; CHECK: br %r14
%add1 = add i64 %src, %index
%add2 = add i64 %add1, 524287
%ptr = inttoptr i64 %add2 to ptr
%val = load i32, ptr %ptr
%cmp = icmp eq i32 %val, 0
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
tail call void @llvm.trap()
unreachable
if.end: ; preds = %entry
call void asm sideeffect "stepa $0", "h"(i32 %val)
ret void;
}
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