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776465d7d2
r258781 optimized memcpy/memmove/memcpy so the intrinsic call can return its first argument, but missed the frame index case. Teach it to ignore that case so C code doesn't assert out in these cases. llvm-svn: 258851
72 lines
2.4 KiB
LLVM
72 lines
2.4 KiB
LLVM
; RUN: llc < %s -asm-verbose=false | FileCheck %s
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; Test memcpy, memmove, and memset intrinsics.
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown"
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declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i32, i1)
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declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i32, i1)
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declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1)
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; Test that return values are optimized.
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; CHECK-LABEL: copy_yes:
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; CHECK: i32.call $push0=, memcpy@FUNCTION, $0, $1, $2{{$}}
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; CHECK-NEXT: return $pop0{{$}}
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define i8* @copy_yes(i8* %dst, i8* %src, i32 %len) {
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %len, i32 1, i1 false)
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ret i8* %dst
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}
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; CHECK-LABEL: copy_no:
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; CHECK: i32.call $discard=, memcpy@FUNCTION, $0, $1, $2{{$}}
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; CHECK-NEXT: return{{$}}
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define void @copy_no(i8* %dst, i8* %src, i32 %len) {
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %len, i32 1, i1 false)
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ret void
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}
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; CHECK-LABEL: move_yes:
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; CHECK: i32.call $push0=, memmove@FUNCTION, $0, $1, $2{{$}}
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; CHECK-NEXT: return $pop0{{$}}
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define i8* @move_yes(i8* %dst, i8* %src, i32 %len) {
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call void @llvm.memmove.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %len, i32 1, i1 false)
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ret i8* %dst
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}
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; CHECK-LABEL: move_no:
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; CHECK: i32.call $discard=, memmove@FUNCTION, $0, $1, $2{{$}}
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; CHECK-NEXT: return{{$}}
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define void @move_no(i8* %dst, i8* %src, i32 %len) {
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call void @llvm.memmove.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %len, i32 1, i1 false)
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ret void
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}
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; CHECK-LABEL: set_yes:
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; CHECK: i32.call $push0=, memset@FUNCTION, $0, $1, $2{{$}}
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; CHECK-NEXT: return $pop0{{$}}
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define i8* @set_yes(i8* %dst, i8 %src, i32 %len) {
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call void @llvm.memset.p0i8.i32(i8* %dst, i8 %src, i32 %len, i32 1, i1 false)
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ret i8* %dst
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}
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; CHECK-LABEL: set_no:
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; CHECK: i32.call $discard=, memset@FUNCTION, $0, $1, $2{{$}}
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; CHECK-NEXT: return{{$}}
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define void @set_no(i8* %dst, i8 %src, i32 %len) {
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call void @llvm.memset.p0i8.i32(i8* %dst, i8 %src, i32 %len, i32 1, i1 false)
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ret void
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}
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; CHECK-LABEL: frame_index:
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; CHECK: i32.call $discard=, memset@FUNCTION, $3, $pop1, $pop0{{$}}
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; CHECK: return{{$}}
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define void @frame_index() {
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entry:
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%a = alloca [2048 x i8], align 16
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%0 = getelementptr inbounds [2048 x i8], [2048 x i8]* %a, i32 0, i32 0
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call void @llvm.memset.p0i8.i32(i8* %0, i8 256, i32 1024, i32 16, i1 false)
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ret void
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}
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