1 ; Check that unaligned accesses are allowed in general. We check the 2 ; few exceptions (like CRL) in their respective test files. 3 ; 4 ; FIXME: -combiner-alias-analysis (the default for SystemZ) stops 5 ; f1 from being optimized. 6 ; RUN: llc < %s -mtriple=s390x-linux-gnu -combiner-alias-analysis=false \ 7 ; RUN: | FileCheck %s 8 9 ; Check that these four byte stores become a single word store. 10 define void @f1(i8 *%ptr) { 11 ; CHECK: f1 12 ; CHECK: iilf [[REG:%r[0-5]]], 66051 13 ; CHECK: st [[REG]], 0(%r2) 14 ; CHECK: br %r14 15 %off1 = getelementptr i8 *%ptr, i64 1 16 %off2 = getelementptr i8 *%ptr, i64 2 17 %off3 = getelementptr i8 *%ptr, i64 3 18 store i8 0, i8 *%ptr 19 store i8 1, i8 *%off1 20 store i8 2, i8 *%off2 21 store i8 3, i8 *%off3 22 ret void 23 } 24 25 ; Check that unaligned 2-byte accesses are allowed. 26 define i16 @f2(i16 *%src, i16 *%dst) { 27 ; CHECK-LABEL: f2: 28 ; CHECK: lh %r2, 0(%r2) 29 ; CHECK: sth %r2, 0(%r3) 30 ; CHECK: br %r14 31 %val = load i16 *%src, align 1 32 store i16 %val, i16 *%dst, align 1 33 ret i16 %val 34 } 35 36 ; Check that unaligned 4-byte accesses are allowed. 37 define i32 @f3(i32 *%src1, i32 *%src2, i32 *%dst) { 38 ; CHECK-LABEL: f3: 39 ; CHECK: l %r2, 0(%r2) 40 ; CHECK: s %r2, 0(%r3) 41 ; CHECK: st %r2, 0(%r4) 42 ; CHECK: br %r14 43 %val1 = load i32 *%src1, align 1 44 %val2 = load i32 *%src2, align 2 45 %sub = sub i32 %val1, %val2 46 store i32 %sub, i32 *%dst, align 1 47 ret i32 %sub 48 } 49 50 ; Check that unaligned 8-byte accesses are allowed. 51 define i64 @f4(i64 *%src1, i64 *%src2, i64 *%dst) { 52 ; CHECK-LABEL: f4: 53 ; CHECK: lg %r2, 0(%r2) 54 ; CHECK: sg %r2, 0(%r3) 55 ; CHECK: stg %r2, 0(%r4) 56 ; CHECK: br %r14 57 %val1 = load i64 *%src1, align 1 58 %val2 = load i64 *%src2, align 2 59 %sub = sub i64 %val1, %val2 60 store i64 %sub, i64 *%dst, align 4 61 ret i64 %sub 62 } 63
