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[SystemZ] Enable unaligned accesses

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The code to distinguish between unaligned and aligned addresses was
already there, so this is mostly just a switch-on-and-test process.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182920 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Richard Sandiford
2013-05-30 09:45:42 +00:00
parent ccb7bd9d84
commit 14a926f13b
14 changed files with 397 additions and 5 deletions
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22
test/CodeGen/SystemZ/int-cmp-40.ll
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@@ -4,6 +4,7 @@
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
@g = global i16 1
@h = global i16 1, align 1, section "foo"
; Check unsigned comparison.
define i64 @f1(i64 %src1) {
@@ -79,3 +80,24 @@ exit:
%res = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
ret i64 %res
}
; Repeat f1 with an unaligned address.
define i64 @f5(i64 %src1) {
; CHECK: f5:
; CHECK: lgrl [[REG:%r[0-5]]], h@GOT
; CHECK: llgh [[VAL:%r[0-5]]], 0([[REG]])
; CHECK: clgr %r2, [[VAL]]
; CHECK-NEXT: jl
; CHECK: br %r14
entry:
%val = load i16 *@h, align 1
%src2 = zext i16 %val to i64
%cond = icmp ult i64 %src1, %src2
br i1 %cond, label %exit, label %mulb
mulb:
%mul = mul i64 %src1, %src1
br label %exit
exit:
%res = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
ret i64 %res
}