172 lines
5.8 KiB
LLVM
172 lines
5.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
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; RUN: llc -fixup-byte-word-insts=1 < %s | FileCheck %s -check-prefix=BWON
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; RUN: llc -fixup-byte-word-insts=0 < %s | FileCheck %s -check-prefix=BWOFF
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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"
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target triple = "x86_64-apple-macosx10.8.0"
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%struct.A = type { i8, i8, i8, i8, i8, i8, i8, i8 }
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; This has byte loads interspersed with byte stores, in a single
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; basic-block loop. The upper portion should be dead, so the movb loads
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; should have been changed into movzbl instead.
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define void @foo1(i32 %count, ptr noalias nocapture %q, ptr noalias nocapture %p) nounwind uwtable noinline ssp {
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; BWON-LABEL: foo1:
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; BWON: ## %bb.0:
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; BWON-NEXT: testl %edi, %edi
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; BWON-NEXT: jle LBB0_2
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; BWON-NEXT: .p2align 4
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; BWON-NEXT: LBB0_1: ## %a4
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; BWON-NEXT: ## =>This Inner Loop Header: Depth=1
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; BWON-NEXT: movzbl (%rsi), %eax
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; BWON-NEXT: movb %al, (%rdx)
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; BWON-NEXT: movzbl 1(%rsi), %eax
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; BWON-NEXT: movb %al, 1(%rdx)
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; BWON-NEXT: addq $8, %rdx
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; BWON-NEXT: decl %edi
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; BWON-NEXT: jne LBB0_1
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; BWON-NEXT: LBB0_2: ## %._crit_edge
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; BWON-NEXT: retq
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;
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; BWOFF-LABEL: foo1:
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; BWOFF: ## %bb.0:
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; BWOFF-NEXT: testl %edi, %edi
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; BWOFF-NEXT: jle LBB0_2
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; BWOFF-NEXT: .p2align 4
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; BWOFF-NEXT: LBB0_1: ## %a4
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; BWOFF-NEXT: ## =>This Inner Loop Header: Depth=1
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; BWOFF-NEXT: movb (%rsi), %al
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; BWOFF-NEXT: movb %al, (%rdx)
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; BWOFF-NEXT: movb 1(%rsi), %al
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; BWOFF-NEXT: movb %al, 1(%rdx)
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; BWOFF-NEXT: addq $8, %rdx
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; BWOFF-NEXT: decl %edi
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; BWOFF-NEXT: jne LBB0_1
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; BWOFF-NEXT: LBB0_2: ## %._crit_edge
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; BWOFF-NEXT: retq
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%1 = icmp sgt i32 %count, 0
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br i1 %1, label %.lr.ph, label %._crit_edge
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.lr.ph: ; preds = %0
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%2 = getelementptr inbounds %struct.A, ptr %q, i64 0, i32 1
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br label %a4
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a4: ; preds = %3, %.lr.ph
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%i.02 = phi i32 [ 0, %.lr.ph ], [ %a9, %a4 ]
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%.01 = phi ptr [ %p, %.lr.ph ], [ %a10, %a4 ]
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%a5 = load i8, ptr %q, align 1
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store i8 %a5, ptr %.01, align 1
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%a8 = getelementptr inbounds %struct.A, ptr %.01, i64 0, i32 1
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%a6 = load i8, ptr %2, align 1
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store i8 %a6, ptr %a8, align 1
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%a9 = add nsw i32 %i.02, 1
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%a10 = getelementptr inbounds %struct.A, ptr %.01, i64 1
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%exitcond = icmp eq i32 %a9, %count
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br i1 %exitcond, label %._crit_edge, label %a4
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._crit_edge: ; preds = %3, %0
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ret void
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}
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%struct.B = type { i16, i16, i16, i16, i16, i16, i16, i16 }
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; This has word loads interspersed with word stores.
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; The upper portion should be dead, so the movw loads should have
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; been changed into movzwl instead.
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define void @foo2(i32 %count, ptr noalias nocapture %q, ptr noalias nocapture %p) nounwind uwtable noinline ssp {
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; BWON-LABEL: foo2:
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; BWON: ## %bb.0:
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; BWON-NEXT: testl %edi, %edi
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; BWON-NEXT: jle LBB1_2
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; BWON-NEXT: .p2align 4
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; BWON-NEXT: LBB1_1: ## %a4
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; BWON-NEXT: ## =>This Inner Loop Header: Depth=1
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; BWON-NEXT: movzwl (%rsi), %eax
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; BWON-NEXT: movw %ax, (%rdx)
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; BWON-NEXT: movzwl 2(%rsi), %eax
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; BWON-NEXT: movw %ax, 2(%rdx)
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; BWON-NEXT: addq $16, %rdx
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; BWON-NEXT: decl %edi
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; BWON-NEXT: jne LBB1_1
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; BWON-NEXT: LBB1_2: ## %._crit_edge
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; BWON-NEXT: retq
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;
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; BWOFF-LABEL: foo2:
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; BWOFF: ## %bb.0:
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; BWOFF-NEXT: testl %edi, %edi
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; BWOFF-NEXT: jle LBB1_2
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; BWOFF-NEXT: .p2align 4
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; BWOFF-NEXT: LBB1_1: ## %a4
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; BWOFF-NEXT: ## =>This Inner Loop Header: Depth=1
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; BWOFF-NEXT: movw (%rsi), %ax
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; BWOFF-NEXT: movw %ax, (%rdx)
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; BWOFF-NEXT: movw 2(%rsi), %ax
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; BWOFF-NEXT: movw %ax, 2(%rdx)
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; BWOFF-NEXT: addq $16, %rdx
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; BWOFF-NEXT: decl %edi
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; BWOFF-NEXT: jne LBB1_1
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; BWOFF-NEXT: LBB1_2: ## %._crit_edge
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; BWOFF-NEXT: retq
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%1 = icmp sgt i32 %count, 0
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br i1 %1, label %.lr.ph, label %._crit_edge
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.lr.ph: ; preds = %0
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%2 = getelementptr inbounds %struct.B, ptr %q, i64 0, i32 1
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br label %a4
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a4: ; preds = %3, %.lr.ph
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%i.02 = phi i32 [ 0, %.lr.ph ], [ %a9, %a4 ]
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%.01 = phi ptr [ %p, %.lr.ph ], [ %a10, %a4 ]
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%a5 = load i16, ptr %q, align 2
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store i16 %a5, ptr %.01, align 2
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%a8 = getelementptr inbounds %struct.B, ptr %.01, i64 0, i32 1
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%a6 = load i16, ptr %2, align 2
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store i16 %a6, ptr %a8, align 2
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%a9 = add nsw i32 %i.02, 1
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%a10 = getelementptr inbounds %struct.B, ptr %.01, i64 1
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%exitcond = icmp eq i32 %a9, %count
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br i1 %exitcond, label %._crit_edge, label %a4
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._crit_edge: ; preds = %3, %0
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ret void
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}
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; This test contains nothing but a simple byte load and store.
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; movb encodes smaller, but we use movzbl for the load for better perf.
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define void @foo3(ptr%dst, ptr%src) {
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; BWON-LABEL: foo3:
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; BWON: ## %bb.0:
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; BWON-NEXT: movzbl (%rsi), %eax
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; BWON-NEXT: movb %al, (%rdi)
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; BWON-NEXT: retq
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;
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; BWOFF-LABEL: foo3:
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; BWOFF: ## %bb.0:
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; BWOFF-NEXT: movb (%rsi), %al
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; BWOFF-NEXT: movb %al, (%rdi)
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; BWOFF-NEXT: retq
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%t0 = load i8, ptr%src, align 1
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store i8 %t0, ptr%dst, align 1
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ret void
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}
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; This test contains nothing but a simple word load and store. Since
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; movw and movzwl are the same size, we should always choose to use
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; movzwl instead.
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define void @foo4(ptr%dst, ptr%src) {
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; BWON-LABEL: foo4:
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; BWON: ## %bb.0:
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; BWON-NEXT: movzwl (%rsi), %eax
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; BWON-NEXT: movw %ax, (%rdi)
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; BWON-NEXT: retq
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;
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; BWOFF-LABEL: foo4:
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; BWOFF: ## %bb.0:
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; BWOFF-NEXT: movw (%rsi), %ax
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; BWOFF-NEXT: movw %ax, (%rdi)
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; BWOFF-NEXT: retq
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%t0 = load i16, ptr%src, align 2
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store i16 %t0, ptr%dst, align 2
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ret void
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}
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