derek.holloway
7502bf64a4
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125 lines
3.2 KiB
LLVM
125 lines
3.2 KiB
LLVM
; Test STOCGs that are presented as selects.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
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declare void @foo(ptr)
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; Test with the loaded value first.
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define void @f1(ptr %ptr, i64 %alt, i32 %limit) {
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; CHECK-LABEL: f1:
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; CHECK: clfi %r4, 42
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; CHECK: stocghe %r3, 0(%r2)
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; CHECK: br %r14
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%cond = icmp ult i32 %limit, 42
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%orig = load i64, ptr %ptr
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%res = select i1 %cond, i64 %orig, i64 %alt
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store i64 %res, ptr %ptr
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ret void
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}
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; ...and with the loaded value second
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define void @f2(ptr %ptr, i64 %alt, i32 %limit) {
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; CHECK-LABEL: f2:
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; CHECK: clfi %r4, 42
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; CHECK: stocgl %r3, 0(%r2)
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; CHECK: br %r14
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%cond = icmp ult i32 %limit, 42
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%orig = load i64, ptr %ptr
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%res = select i1 %cond, i64 %alt, i64 %orig
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store i64 %res, ptr %ptr
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ret void
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}
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; Check the high end of the aligned STOCG range.
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define void @f3(ptr %base, i64 %alt, i32 %limit) {
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; CHECK-LABEL: f3:
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; CHECK: clfi %r4, 42
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; CHECK: stocghe %r3, 524280(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i64, ptr %base, i64 65535
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%cond = icmp ult i32 %limit, 42
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%orig = load i64, ptr %ptr
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%res = select i1 %cond, i64 %orig, i64 %alt
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store i64 %res, ptr %ptr
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ret void
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}
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; Check the next doubleword up. Other sequences besides this one would be OK.
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define void @f4(ptr %base, i64 %alt, i32 %limit) {
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; CHECK-LABEL: f4:
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; CHECK: agfi %r2, 524288
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; CHECK: clfi %r4, 42
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; CHECK: stocghe %r3, 0(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i64, ptr %base, i64 65536
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%cond = icmp ult i32 %limit, 42
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%orig = load i64, ptr %ptr
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%res = select i1 %cond, i64 %orig, i64 %alt
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store i64 %res, ptr %ptr
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ret void
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}
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; Check the low end of the STOCG range.
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define void @f5(ptr %base, i64 %alt, i32 %limit) {
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; CHECK-LABEL: f5:
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; CHECK: clfi %r4, 42
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; CHECK: stocghe %r3, -524288(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i64, ptr %base, i64 -65536
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%cond = icmp ult i32 %limit, 42
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%orig = load i64, ptr %ptr
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%res = select i1 %cond, i64 %orig, i64 %alt
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store i64 %res, ptr %ptr
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ret void
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}
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; Check the next doubleword down, with the same comments as f4.
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define void @f6(ptr %base, i64 %alt, i32 %limit) {
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; CHECK-LABEL: f6:
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; CHECK: agfi %r2, -524296
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; CHECK: clfi %r4, 42
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; CHECK: stocghe %r3, 0(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i64, ptr %base, i64 -65537
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%cond = icmp ult i32 %limit, 42
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%orig = load i64, ptr %ptr
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%res = select i1 %cond, i64 %orig, i64 %alt
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store i64 %res, ptr %ptr
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ret void
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}
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; Try a frame index base.
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define void @f7(i64 %alt, i32 %limit) {
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; CHECK-LABEL: f7:
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; CHECK: brasl %r14, foo@PLT
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; CHECK: stocghe {{%r[0-9]+}}, {{[0-9]+}}(%r15)
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; CHECK: brasl %r14, foo@PLT
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; CHECK: br %r14
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%ptr = alloca i64
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call void @foo(ptr %ptr)
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%cond = icmp ult i32 %limit, 42
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%orig = load i64, ptr %ptr
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%res = select i1 %cond, i64 %orig, i64 %alt
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store i64 %res, ptr %ptr
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call void @foo(ptr %ptr)
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ret void
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}
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; Test that conditionally-executed stores do not use STOC, since STOC
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; is allowed to trap even when the condition is false.
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define void @f8(i64 %a, i64 %b, ptr %dest) {
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; CHECK-LABEL: f8:
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; CHECK-NOT: stocg %r3, 0(%r4)
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; CHECK: br %r14
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entry:
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%cmp = icmp ule i64 %a, %b
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br i1 %cmp, label %store, label %exit
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store:
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store i64 %b, ptr %dest
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br label %exit
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exit:
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ret void
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}
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