107 lines
3.8 KiB
LLVM
107 lines
3.8 KiB
LLVM
; RUN: opt < %s -sroa -S | FileCheck %s
|
|
target datalayout = "e-p:64:64:64-p1:16:16:16-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-f80:128-v64:64:64-v128:128:128-a0:0:64-n8:16:32:64"
|
|
|
|
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
|
|
declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind
|
|
|
|
define void @no_split_on_non_byte_width(i32) {
|
|
; This tests that allocas are not split into slices that are not byte width multiple
|
|
%arg = alloca i32 , align 8
|
|
store i32 %0, i32* %arg
|
|
br label %load_i32
|
|
|
|
load_i32:
|
|
; CHECK-LABEL: load_i32:
|
|
; CHECK-NOT: bitcast {{.*}} to i1
|
|
; CHECK-NOT: zext i1
|
|
%r0 = load i32, i32* %arg
|
|
br label %load_i1
|
|
|
|
load_i1:
|
|
; CHECK-LABEL: load_i1:
|
|
; CHECK: bitcast {{.*}} to i1
|
|
%p1 = bitcast i32* %arg to i1*
|
|
%t1 = load i1, i1* %p1
|
|
ret void
|
|
}
|
|
|
|
; PR18726: Check that we use memcpy and memset to fill out padding when we have
|
|
; a slice with a simple single type whose store size is smaller than the slice
|
|
; size.
|
|
|
|
%union.Foo = type { x86_fp80, i64, i64 }
|
|
|
|
@foo_copy_source = external constant %union.Foo
|
|
@i64_sink = global i64 0
|
|
|
|
define void @memcpy_fp80_padding() {
|
|
%x = alloca %union.Foo
|
|
|
|
; Copy from a global.
|
|
%x_i8 = bitcast %union.Foo* %x to i8*
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %x_i8, i8* bitcast (%union.Foo* @foo_copy_source to i8*), i32 32, i32 16, i1 false)
|
|
|
|
; Access a slice of the alloca to trigger SROA.
|
|
%mid_p = getelementptr %union.Foo, %union.Foo* %x, i32 0, i32 1
|
|
%elt = load i64, i64* %mid_p
|
|
store i64 %elt, i64* @i64_sink
|
|
ret void
|
|
}
|
|
; CHECK-LABEL: define void @memcpy_fp80_padding
|
|
; CHECK: alloca x86_fp80
|
|
; CHECK: call void @llvm.memcpy.p0i8.p0i8.i32
|
|
; CHECK: load i64, i64* getelementptr inbounds (%union.Foo, %union.Foo* @foo_copy_source, i64 0, i32 1)
|
|
; CHECK: load i64, i64* getelementptr inbounds (%union.Foo, %union.Foo* @foo_copy_source, i64 0, i32 2)
|
|
|
|
define void @memset_fp80_padding() {
|
|
%x = alloca %union.Foo
|
|
|
|
; Set to all ones.
|
|
%x_i8 = bitcast %union.Foo* %x to i8*
|
|
call void @llvm.memset.p0i8.i32(i8* %x_i8, i8 -1, i32 32, i32 16, i1 false)
|
|
|
|
; Access a slice of the alloca to trigger SROA.
|
|
%mid_p = getelementptr %union.Foo, %union.Foo* %x, i32 0, i32 1
|
|
%elt = load i64, i64* %mid_p
|
|
store i64 %elt, i64* @i64_sink
|
|
ret void
|
|
}
|
|
; CHECK-LABEL: define void @memset_fp80_padding
|
|
; CHECK: alloca x86_fp80
|
|
; CHECK: call void @llvm.memset.p0i8.i32(i8* %{{.*}}, i8 -1, i32 16, i32 16, i1 false)
|
|
; CHECK: store i64 -1, i64* @i64_sink
|
|
|
|
%S.vec3float = type { float, float, float }
|
|
%U.vec3float = type { <4 x float> }
|
|
|
|
declare i32 @memcpy_vec3float_helper(%S.vec3float*)
|
|
|
|
define i32 @memcpy_vec3float_widening(%S.vec3float* %x) {
|
|
; CHECK-LABEL: @memcpy_vec3float_widening(
|
|
; PR18726: Check that SROA does not rewrite a 12-byte memcpy into a 16-byte
|
|
; vector store, hence accidentally putting gibberish onto the stack.
|
|
entry:
|
|
; Create a temporary variable %tmp1 and copy %x[0] into it
|
|
%tmp1 = alloca %S.vec3float, align 4
|
|
%0 = bitcast %S.vec3float* %tmp1 to i8*
|
|
%1 = bitcast %S.vec3float* %x to i8*
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %0, i8* %1, i32 12, i32 4, i1 false)
|
|
|
|
; The following block does nothing; but appears to confuse SROA
|
|
%unused1 = bitcast %S.vec3float* %tmp1 to %U.vec3float*
|
|
%unused2 = getelementptr inbounds %U.vec3float, %U.vec3float* %unused1, i32 0, i32 0
|
|
%unused3 = load <4 x float>, <4 x float>* %unused2, align 1
|
|
|
|
; Create a second temporary and copy %tmp1 into it
|
|
%tmp2 = alloca %S.vec3float, align 4
|
|
%2 = bitcast %S.vec3float* %tmp2 to i8*
|
|
%3 = bitcast %S.vec3float* %tmp1 to i8*
|
|
; CHECK: alloca
|
|
; CHECK-NOT: store <4 x float>
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %2, i8* %3, i32 12, i32 4, i1 false)
|
|
|
|
%result = call i32 @memcpy_vec3float_helper(%S.vec3float* %tmp2)
|
|
ret i32 %result
|
|
; CHECK: ret i32 %result
|
|
}
|