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llvm-mirror/test/CodeGen/WebAssembly/mem-intrinsics.ll

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[WebAssembly] Optimize memcpy/memmove/memcpy calls. These calls return their first argument, but because LLVM uses an intrinsic with a void return type, they can't use the returned attribute. Generalize the store results pass to optimize these calls too. llvm-svn: 258781
2016-01-26 05:01:11 +01:00
; RUN: llc < %s -asm-verbose=false | FileCheck %s
; Test memcpy, memmove, and memset intrinsics.
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown"
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i32, i1)
declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i32, i1)
declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1)
; Test that return values are optimized.
; CHECK-LABEL: copy_yes:
; CHECK: i32.call $push0=, memcpy@FUNCTION, $0, $1, $2{{$}}
; CHECK-NEXT: return $pop0{{$}}
define i8* @copy_yes(i8* %dst, i8* %src, i32 %len) {
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %len, i32 1, i1 false)
ret i8* %dst
}
; CHECK-LABEL: copy_no:
; CHECK: i32.call $discard=, memcpy@FUNCTION, $0, $1, $2{{$}}
; CHECK-NEXT: return{{$}}
define void @copy_no(i8* %dst, i8* %src, i32 %len) {
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %len, i32 1, i1 false)
ret void
}
; CHECK-LABEL: move_yes:
; CHECK: i32.call $push0=, memmove@FUNCTION, $0, $1, $2{{$}}
; CHECK-NEXT: return $pop0{{$}}
define i8* @move_yes(i8* %dst, i8* %src, i32 %len) {
call void @llvm.memmove.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %len, i32 1, i1 false)
ret i8* %dst
}
; CHECK-LABEL: move_no:
; CHECK: i32.call $discard=, memmove@FUNCTION, $0, $1, $2{{$}}
; CHECK-NEXT: return{{$}}
define void @move_no(i8* %dst, i8* %src, i32 %len) {
call void @llvm.memmove.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %len, i32 1, i1 false)
ret void
}
; CHECK-LABEL: set_yes:
; CHECK: i32.call $push0=, memset@FUNCTION, $0, $1, $2{{$}}
; CHECK-NEXT: return $pop0{{$}}
define i8* @set_yes(i8* %dst, i8 %src, i32 %len) {
call void @llvm.memset.p0i8.i32(i8* %dst, i8 %src, i32 %len, i32 1, i1 false)
ret i8* %dst
}
; CHECK-LABEL: set_no:
; CHECK: i32.call $discard=, memset@FUNCTION, $0, $1, $2{{$}}
; CHECK-NEXT: return{{$}}
define void @set_no(i8* %dst, i8 %src, i32 %len) {
call void @llvm.memset.p0i8.i32(i8* %dst, i8 %src, i32 %len, i32 1, i1 false)
ret void
}
WebAssembly: don't optimize memcpy/memmove/memcpy to frame index 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
2016-01-26 21:22:42 +01:00
[WebAssembly] Omit no-op adds for non-mem uses of FrameIndex Differential Revision: http://reviews.llvm.org/D16554 llvm-svn: 258872
2016-01-26 23:47:43 +01:00
WebAssembly: don't optimize memcpy/memmove/memcpy to frame index 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
2016-01-26 21:22:42 +01:00
; CHECK-LABEL: frame_index:
Revert "[WebAssembly] Stackify code emitted by eliminateFrameIndex" This reverts r261685 due to wasm test breakage. llvm-svn: 261702
2016-02-23 23:13:21 +01:00
; CHECK: i32.call $discard=, memset@FUNCTION, $0, $pop1, $pop0{{$}}
; CHECK: i32.call $discard=, memset@FUNCTION, $1, $pop3, $pop2{{$}}
WebAssembly: don't optimize memcpy/memmove/memcpy to frame index 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
2016-01-26 21:22:42 +01:00
; CHECK: return{{$}}
define void @frame_index() {
entry:
%a = alloca [2048 x i8], align 16
[WebAssembly] Omit no-op adds for non-mem uses of FrameIndex Differential Revision: http://reviews.llvm.org/D16554 llvm-svn: 258872
2016-01-26 23:47:43 +01:00
%b = alloca [2048 x i8], align 16
WebAssembly: don't optimize memcpy/memmove/memcpy to frame index 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
2016-01-26 21:22:42 +01:00
%0 = getelementptr inbounds [2048 x i8], [2048 x i8]* %a, i32 0, i32 0
[WebAssembly] Omit no-op adds for non-mem uses of FrameIndex Differential Revision: http://reviews.llvm.org/D16554 llvm-svn: 258872
2016-01-26 23:47:43 +01:00
%1 = getelementptr inbounds [2048 x i8], [2048 x i8]* %b, i32 0, i32 0
WebAssembly: don't optimize memcpy/memmove/memcpy to frame index 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
2016-01-26 21:22:42 +01:00
call void @llvm.memset.p0i8.i32(i8* %0, i8 256, i32 1024, i32 16, i1 false)
[WebAssembly] Omit no-op adds for non-mem uses of FrameIndex Differential Revision: http://reviews.llvm.org/D16554 llvm-svn: 258872
2016-01-26 23:47:43 +01:00
call void @llvm.memset.p0i8.i32(i8* %1, i8 256, i32 1024, i32 16, i1 false)
WebAssembly: don't optimize memcpy/memmove/memcpy to frame index 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
2016-01-26 21:22:42 +01:00
ret void
}
[WebAssembly] Add a test for the mem-intrinsic code in WebAssemblyPeephole.cpp llvm-svn: 258895
2016-01-27 02:37:52 +01:00
; If the result value of memset doesn't get stackified, it should be marked
; $discard.
; CHECK-LABEL: discard_result:
; CHECK: i32.call $discard=, memset@FUNCTION, $0, $1, $2
declare i8* @def()
define i8* @discard_result(i8* %arg, i8 %arg1, i32 %arg2, i32 %arg3, i32 %arg4) {
bb:
%tmp = icmp eq i32 %arg3, 0
br i1 %tmp, label %bb5, label %bb9
bb5:
%tmp6 = icmp eq i32 %arg4, 0
br i1 %tmp6, label %bb7, label %bb8
bb7:
call void @llvm.memset.p0i8.i32(i8* %arg, i8 %arg1, i32 %arg2, i32 1, i1 false)
br label %bb11
bb8:
br label %bb11
bb9:
%tmp10 = call i8* @def()
br label %bb11
bb11:
%tmp12 = phi i8* [ %arg, %bb7 ], [ %arg, %bb8 ], [ %tmp10, %bb9 ]
ret i8* %tmp12
}
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