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llvm-mirror/test/CodeGen/SystemZ/memcpy-02.ll
Manman Ren 2ef9ca7627 TBAA: handle scalar TBAA format and struct-path aware TBAA format. 
Remove the command line argument "struct-path-tbaa" since we should not depend
on command line argument to decide which format the IR file is using. Instead,
we check the first operand of the tbaa tag node, if it is a MDNode, we treat
it as struct-path aware TBAA format, otherwise, we treat it as scalar TBAA
format.

When clang starts to use struct-path aware TBAA format no matter whether
struct-path-tbaa is no, and we can auto-upgrade existing bc files, the support
for scalar TBAA format can be dropped.

Existing testing cases are updated to use the struct-path aware TBAA format.

llvm-svn: 191538
2013-09-27 18:34:27 +00:00

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; Test load/store pairs that act as memcpys.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
@g1src = global i8 1
@g1dst = global i8 1
@g2src = global i16 2
@g2dst = global i16 2
@g3 = global i32 3
@g4 = global i64 4
@g5src = external global fp128, align 16
@g5dst = external global fp128, align 16
; Test the simple i8 case.
define void @f1(i8 *%ptr1) {
; CHECK-LABEL: f1:
; CHECK: mvc 1(1,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i8 *%ptr1, i64 1
%val = load i8 *%ptr1
store i8 %val, i8 *%ptr2
ret void
}
; Test i8 cases where the value is zero-extended to 32 bits.
define void @f2(i8 *%ptr1) {
; CHECK-LABEL: f2:
; CHECK: mvc 1(1,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i8 *%ptr1, i64 1
%val = load i8 *%ptr1
%ext = zext i8 %val to i32
%trunc = trunc i32 %ext to i8
store i8 %trunc, i8 *%ptr2
ret void
}
; Test i8 cases where the value is zero-extended to 64 bits.
define void @f3(i8 *%ptr1) {
; CHECK-LABEL: f3:
; CHECK: mvc 1(1,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i8 *%ptr1, i64 1
%val = load i8 *%ptr1
%ext = zext i8 %val to i64
%trunc = trunc i64 %ext to i8
store i8 %trunc, i8 *%ptr2
ret void
}
; Test i8 cases where the value is sign-extended to 32 bits.
define void @f4(i8 *%ptr1) {
; CHECK-LABEL: f4:
; CHECK: mvc 1(1,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i8 *%ptr1, i64 1
%val = load i8 *%ptr1
%ext = sext i8 %val to i32
%trunc = trunc i32 %ext to i8
store i8 %trunc, i8 *%ptr2
ret void
}
; Test i8 cases where the value is sign-extended to 64 bits.
define void @f5(i8 *%ptr1) {
; CHECK-LABEL: f5:
; CHECK: mvc 1(1,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i8 *%ptr1, i64 1
%val = load i8 *%ptr1
%ext = sext i8 %val to i64
%trunc = trunc i64 %ext to i8
store i8 %trunc, i8 *%ptr2
ret void
}
; Test the simple i16 case.
define void @f6(i16 *%ptr1) {
; CHECK-LABEL: f6:
; CHECK: mvc 2(2,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i16 *%ptr1, i64 1
%val = load i16 *%ptr1
store i16 %val, i16 *%ptr2
ret void
}
; Test i16 cases where the value is zero-extended to 32 bits.
define void @f7(i16 *%ptr1) {
; CHECK-LABEL: f7:
; CHECK: mvc 2(2,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i16 *%ptr1, i64 1
%val = load i16 *%ptr1
%ext = zext i16 %val to i32
%trunc = trunc i32 %ext to i16
store i16 %trunc, i16 *%ptr2
ret void
}
; Test i16 cases where the value is zero-extended to 64 bits.
define void @f8(i16 *%ptr1) {
; CHECK-LABEL: f8:
; CHECK: mvc 2(2,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i16 *%ptr1, i64 1
%val = load i16 *%ptr1
%ext = zext i16 %val to i64
%trunc = trunc i64 %ext to i16
store i16 %trunc, i16 *%ptr2
ret void
}
; Test i16 cases where the value is sign-extended to 32 bits.
define void @f9(i16 *%ptr1) {
; CHECK-LABEL: f9:
; CHECK: mvc 2(2,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i16 *%ptr1, i64 1
%val = load i16 *%ptr1
%ext = sext i16 %val to i32
%trunc = trunc i32 %ext to i16
store i16 %trunc, i16 *%ptr2
ret void
}
; Test i16 cases where the value is sign-extended to 64 bits.
define void @f10(i16 *%ptr1) {
; CHECK-LABEL: f10:
; CHECK: mvc 2(2,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i16 *%ptr1, i64 1
%val = load i16 *%ptr1
%ext = sext i16 %val to i64
%trunc = trunc i64 %ext to i16
store i16 %trunc, i16 *%ptr2
ret void
}
; Test the simple i32 case.
define void @f11(i32 *%ptr1) {
; CHECK-LABEL: f11:
; CHECK: mvc 4(4,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i32 *%ptr1, i64 1
%val = load i32 *%ptr1
store i32 %val, i32 *%ptr2
ret void
}
; Test i32 cases where the value is zero-extended to 64 bits.
define void @f12(i32 *%ptr1) {
; CHECK-LABEL: f12:
; CHECK: mvc 4(4,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i32 *%ptr1, i64 1
%val = load i32 *%ptr1
%ext = zext i32 %val to i64
%trunc = trunc i64 %ext to i32
store i32 %trunc, i32 *%ptr2
ret void
}
; Test i32 cases where the value is sign-extended to 64 bits.
define void @f13(i32 *%ptr1) {
; CHECK-LABEL: f13:
; CHECK: mvc 4(4,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i32 *%ptr1, i64 1
%val = load i32 *%ptr1
%ext = sext i32 %val to i64
%trunc = trunc i64 %ext to i32
store i32 %trunc, i32 *%ptr2
ret void
}
; Test the i64 case.
define void @f14(i64 *%ptr1) {
; CHECK-LABEL: f14:
; CHECK: mvc 8(8,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i64 *%ptr1, i64 1
%val = load i64 *%ptr1
store i64 %val, i64 *%ptr2
ret void
}
; Test the f32 case.
define void @f15(float *%ptr1) {
; CHECK-LABEL: f15:
; CHECK: mvc 4(4,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr float *%ptr1, i64 1
%val = load float *%ptr1
store float %val, float *%ptr2
ret void
}
; Test the f64 case.
define void @f16(double *%ptr1) {
; CHECK-LABEL: f16:
; CHECK: mvc 8(8,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr double *%ptr1, i64 1
%val = load double *%ptr1
store double %val, double *%ptr2
ret void
}
; Test the f128 case.
define void @f17(fp128 *%ptr1) {
; CHECK-LABEL: f17:
; CHECK: mvc 16(16,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr fp128 *%ptr1, i64 1
%val = load fp128 *%ptr1
store fp128 %val, fp128 *%ptr2
ret void
}
; Make sure that we don't use MVC if the load is volatile.
define void @f18(i64 *%ptr1) {
; CHECK-LABEL: f18:
; CHECK-NOT: mvc
; CHECK: br %r14
%ptr2 = getelementptr i64 *%ptr1, i64 1
%val = load volatile i64 *%ptr1
store i64 %val, i64 *%ptr2
ret void
}
; ...likewise the store.
define void @f19(i64 *%ptr1) {
; CHECK-LABEL: f19:
; CHECK-NOT: mvc
; CHECK: br %r14
%ptr2 = getelementptr i64 *%ptr1, i64 1
%val = load i64 *%ptr1
store volatile i64 %val, i64 *%ptr2
ret void
}
; Test that MVC is not used for aligned loads and stores if there is
; no way of telling whether they alias. We don't want to use MVC in
; cases where the addresses could be equal.
define void @f20(i64 *%ptr1, i64 *%ptr2) {
; CHECK-LABEL: f20:
; CHECK-NOT: mvc
; CHECK: br %r14
%val = load i64 *%ptr1
store i64 %val, i64 *%ptr2
ret void
}
; ...and again for unaligned loads and stores.
define void @f21(i64 *%ptr1, i64 *%ptr2) {
; CHECK-LABEL: f21:
; CHECK-NOT: mvc
; CHECK: br %r14
%val = load i64 *%ptr1, align 2
store i64 %val, i64 *%ptr2, align 2
ret void
}
; Test a case where there is definite overlap.
define void @f22(i64 %base) {
; CHECK-LABEL: f22:
; CHECK-NOT: mvc
; CHECK: br %r14
%add = add i64 %base, 1
%ptr1 = inttoptr i64 %base to i64 *
%ptr2 = inttoptr i64 %add to i64 *
%val = load i64 *%ptr1, align 1
store i64 %val, i64 *%ptr2, align 1
ret void
}
; Test that we can use MVC for global addresses for i8.
define void @f23(i8 *%ptr) {
; CHECK-LABEL: f23:
; CHECK-DAG: larl [[SRC:%r[0-5]]], g1src
; CHECK-DAG: larl [[DST:%r[0-5]]], g1dst
; CHECK: mvc 0(1,[[DST]]), 0([[SRC]])
; CHECK: br %r14
%val = load i8 *@g1src
store i8 %val, i8 *@g1dst
ret void
}
; Test that we use LHRL and STHRL for i16.
define void @f24(i16 *%ptr) {
; CHECK-LABEL: f24:
; CHECK: lhrl [[REG:%r[0-5]]], g2src
; CHECK: sthrl [[REG]], g2dst
; CHECK: br %r14
%val = load i16 *@g2src
store i16 %val, i16 *@g2dst
ret void
}
; Test that we use LRL for i32.
define void @f25(i32 *%ptr) {
; CHECK-LABEL: f25:
; CHECK: lrl [[REG:%r[0-5]]], g3
; CHECK: st [[REG]], 0(%r2)
; CHECK: br %r14
%val = load i32 *@g3
store i32 %val, i32 *%ptr
ret void
}
; ...likewise STRL.
define void @f26(i32 *%ptr) {
; CHECK-LABEL: f26:
; CHECK: l [[REG:%r[0-5]]], 0(%r2)
; CHECK: strl [[REG]], g3
; CHECK: br %r14
%val = load i32 *%ptr
store i32 %val, i32 *@g3
ret void
}
; Test that we use LGRL for i64.
define void @f27(i64 *%ptr) {
; CHECK-LABEL: f27:
; CHECK: lgrl [[REG:%r[0-5]]], g4
; CHECK: stg [[REG]], 0(%r2)
; CHECK: br %r14
%val = load i64 *@g4
store i64 %val, i64 *%ptr
ret void
}
; ...likewise STGRL.
define void @f28(i64 *%ptr) {
; CHECK-LABEL: f28:
; CHECK: lg [[REG:%r[0-5]]], 0(%r2)
; CHECK: stgrl [[REG]], g4
; CHECK: br %r14
%val = load i64 *%ptr
store i64 %val, i64 *@g4
ret void
}
; Test that we can use MVC for global addresses for fp128.
define void @f29(fp128 *%ptr) {
; CHECK-LABEL: f29:
; CHECK-DAG: larl [[SRC:%r[0-5]]], g5src
; CHECK-DAG: larl [[DST:%r[0-5]]], g5dst
; CHECK: mvc 0(16,[[DST]]), 0([[SRC]])
; CHECK: br %r14
%val = load fp128 *@g5src, align 16
store fp128 %val, fp128 *@g5dst, align 16
ret void
}
; Test a case where offset disambiguation is enough.
define void @f30(i64 *%ptr1) {
; CHECK-LABEL: f30:
; CHECK: mvc 8(8,%r2), 0(%r2)
; CHECK: br %r14
%ptr2 = getelementptr i64 *%ptr1, i64 1
%val = load i64 *%ptr1, align 1
store i64 %val, i64 *%ptr2, align 1
ret void
}
; Test f21 in cases where TBAA tells us there is no alias.
define void @f31(i64 *%ptr1, i64 *%ptr2) {
; CHECK-LABEL: f31:
; CHECK: mvc 0(8,%r3), 0(%r2)
; CHECK: br %r14
%val = load i64 *%ptr1, align 2, !tbaa !1
store i64 %val, i64 *%ptr2, align 2, !tbaa !2
ret void
}
; Test f21 in cases where TBAA is present but doesn't help.
define void @f32(i64 *%ptr1, i64 *%ptr2) {
; CHECK-LABEL: f32:
; CHECK-NOT: mvc
; CHECK: br %r14
%val = load i64 *%ptr1, align 2, !tbaa !1
store i64 %val, i64 *%ptr2, align 2, !tbaa !1
ret void
}
!0 = metadata !{ metadata !"root" }
!1 = metadata !{ metadata !3, metadata !3, i64 0 }
!2 = metadata !{ metadata !4, metadata !4, i64 0 }
!3 = metadata !{ metadata !"set1", metadata !0 }
!4 = metadata !{ metadata !"set2", metadata !0 }
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