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60 lines
1.6 KiB
LLVM
60 lines
1.6 KiB
LLVM
; Check that unaligned accesses are allowed in general. We check the
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; few exceptions (like CRL) in their respective test files.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; Check that these four byte stores become a single word store.
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define void @f1(i8 *%ptr) {
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; CHECK: f1
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; CHECK: iilf [[REG:%r[0-5]]], 66051
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; CHECK: st [[REG]], 0(%r2)
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; CHECK: br %r14
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%off1 = getelementptr i8, i8 *%ptr, i64 1
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%off2 = getelementptr i8, i8 *%ptr, i64 2
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%off3 = getelementptr i8, i8 *%ptr, i64 3
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store i8 0, i8 *%ptr
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store i8 1, i8 *%off1
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store i8 2, i8 *%off2
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store i8 3, i8 *%off3
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ret void
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}
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; Check that unaligned 2-byte accesses are allowed.
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define i16 @f2(i16 *%src, i16 *%dst) {
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; CHECK-LABEL: f2:
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; CHECK: lh %r2, 0(%r2)
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; CHECK: sth %r2, 0(%r3)
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; CHECK: br %r14
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%val = load i16, i16 *%src, align 1
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store i16 %val, i16 *%dst, align 1
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ret i16 %val
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}
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; Check that unaligned 4-byte accesses are allowed.
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define i32 @f3(i32 *%src1, i32 *%src2, i32 *%dst) {
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; CHECK-LABEL: f3:
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; CHECK: l %r2, 0(%r2)
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; CHECK: s %r2, 0(%r3)
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; CHECK: st %r2, 0(%r4)
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; CHECK: br %r14
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%val1 = load i32, i32 *%src1, align 1
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%val2 = load i32, i32 *%src2, align 2
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%sub = sub i32 %val1, %val2
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store i32 %sub, i32 *%dst, align 1
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ret i32 %sub
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}
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; Check that unaligned 8-byte accesses are allowed.
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define i64 @f4(i64 *%src1, i64 *%src2, i64 *%dst) {
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; CHECK-LABEL: f4:
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; CHECK: lg %r2, 0(%r2)
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; CHECK: sg %r2, 0(%r3)
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; CHECK: stg %r2, 0(%r4)
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; CHECK: br %r14
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%val1 = load i64, i64 *%src1, align 1
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%val2 = load i64, i64 *%src2, align 2
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%sub = sub i64 %val1, %val2
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store i64 %sub, i64 *%dst, align 4
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ret i64 %sub
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}
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