1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
; RUN: opt < %s -basic-aa -memcpyopt -dse -S | grep "call.*initialize" | not grep memtmp
; PR2077
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32"
target triple = "i386-pc-linux-gnu"
%0 = type { x86_fp80, x86_fp80 }
define internal fastcc void @initialize(%0* noalias nocapture sret %agg.result) nounwind {
entry:
%agg.result.03 = getelementptr %0, %0* %agg.result, i32 0, i32 0
store x86_fp80 0xK00000000000000000000, x86_fp80* %agg.result.03
%agg.result.15 = getelementptr %0, %0* %agg.result, i32 0, i32 1
store x86_fp80 0xK00000000000000000000, x86_fp80* %agg.result.15
ret void
}
declare fastcc x86_fp80 @passed_uninitialized(%0* nocapture) nounwind
define fastcc void @badly_optimized() nounwind {
entry:
%z = alloca %0
%tmp = alloca %0
%memtmp = alloca %0, align 8
call fastcc void @initialize(%0* noalias sret %memtmp)
%tmp1 = bitcast %0* %tmp to i8*
%memtmp2 = bitcast %0* %memtmp to i8*
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 8 %tmp1, i8* align 8 %memtmp2, i32 24, i1 false)
%z3 = bitcast %0* %z to i8*
%tmp4 = bitcast %0* %tmp to i8*
call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 8 %z3, i8* align 8 %tmp4, i32 24, i1 false)
%tmp5 = call fastcc x86_fp80 @passed_uninitialized(%0* %z)
ret void
}
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i1) nounwind
|
