; RUN: llc -fixup-byte-word-insts=1 < %s | \
; RUN: FileCheck -check-prefix CHECK -check-prefix BWON %s
; RUN: llc -fixup-byte-word-insts=0 < %s | \
; RUN: FileCheck -check-prefix CHECK -check-prefix BWOFF %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.8.0"
%struct.A = type { i8, i8, i8, i8, i8, i8, i8, i8 }
; This has byte loads interspersed with byte stores, in a single
; basic-block loop. The upper portion should be dead, so the movb loads
; should have been changed into movzbl instead.
; CHECK-LABEL: foo1
; load:
; BWON: movzbl
; BWOFF: movb
; store:
; CHECK: movb
; load:
; BWON: movzbl
; BWOFF: movb
; store:
; CHECK: movb
; CHECK: ret
define void @foo1(i32 %count,
ptr noalias nocapture %q,
ptr noalias nocapture %p)
nounwind uwtable noinline ssp {
%1 = icmp sgt i32 %count, 0
br i1 %1, label %.lr.ph, label %._crit_edge
.lr.ph: ; preds = %0
%2 = getelementptr inbounds %struct.A, ptr %q, i64 0, i32 1
br label %a4
a4: ; preds = %3, %.lr.ph
%i.02 = phi i32 [ 0, %.lr.ph ], [ %a9, %a4 ]
%.01 = phi ptr [ %p, %.lr.ph ], [ %a10, %a4 ]
%a5 = load i8, ptr %q, align 1
store i8 %a5, ptr %.01, align 1
%a8 = getelementptr inbounds %struct.A, ptr %.01, i64 0, i32 1
%a6 = load i8, ptr %2, align 1
store i8 %a6, ptr %a8, align 1
%a9 = add nsw i32 %i.02, 1
%a10 = getelementptr inbounds %struct.A, ptr %.01, i64 1
%exitcond = icmp eq i32 %a9, %count
br i1 %exitcond, label %._crit_edge, label %a4
._crit_edge: ; preds = %3, %0
ret void
}
%struct.B = type { i16, i16, i16, i16, i16, i16, i16, i16 }
; This has word loads interspersed with word stores.
; The upper portion should be dead, so the movw loads should have
; been changed into movzwl instead.
; CHECK-LABEL: foo2
; load:
; BWON: movzwl
; BWOFF: movw
; store:
; CHECK: movw
; load:
; BWON: movzwl
; BWOFF: movw
; store:
; CHECK: movw
; CHECK: ret
define void @foo2(i32 %count,
ptr noalias nocapture %q,
ptr noalias nocapture %p)
nounwind uwtable noinline ssp {
%1 = icmp sgt i32 %count, 0
br i1 %1, label %.lr.ph, label %._crit_edge
.lr.ph: ; preds = %0
%2 = getelementptr inbounds %struct.B, ptr %q, i64 0, i32 1
br label %a4
a4: ; preds = %3, %.lr.ph
%i.02 = phi i32 [ 0, %.lr.ph ], [ %a9, %a4 ]
%.01 = phi ptr [ %p, %.lr.ph ], [ %a10, %a4 ]
%a5 = load i16, ptr %q, align 2
store i16 %a5, ptr %.01, align 2
%a8 = getelementptr inbounds %struct.B, ptr %.01, i64 0, i32 1
%a6 = load i16, ptr %2, align 2
store i16 %a6, ptr %a8, align 2
%a9 = add nsw i32 %i.02, 1
%a10 = getelementptr inbounds %struct.B, ptr %.01, i64 1
%exitcond = icmp eq i32 %a9, %count
br i1 %exitcond, label %._crit_edge, label %a4
._crit_edge: ; preds = %3, %0
ret void
}
; This test contains nothing but a simple byte load and store.
; movb encodes smaller, but we use movzbl for the load for better perf.
; CHECK-LABEL: foo3:
; BWON: movzbl
; BWOFF: movb
; CHECK: movb
define void @foo3(ptr%dst, ptr%src) {
%t0 = load i8, ptr%src, align 1
store i8 %t0, ptr%dst, align 1
ret void
}
; This test contains nothing but a simple word load and store. Since
; movw and movzwl are the same size, we should always choose to use
; movzwl instead.
; CHECK-LABEL: foo4:
; BWON: movzwl
; BWOFF: movw
; CHECK: movw
define void @foo4(ptr%dst, ptr%src) {
%t0 = load i16, ptr%src, align 2
store i16 %t0, ptr%dst, align 2
ret void
}
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