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
|
; RUN: opt < %s -instcombine -S | grep "insertelement <4 x float> undef"
; Instcombine should be able to prove that none of the
; insertelement's first operand's elements are needed.
define internal void @""(i8*) {
; <label>:1
bitcast i8* %0 to i32* ; <i32*>:2 [#uses=1]
load i32, i32* %2, align 1 ; <i32>:3 [#uses=1]
getelementptr i8, i8* %0, i32 4 ; <i8*>:4 [#uses=1]
bitcast i8* %4 to i32* ; <i32*>:5 [#uses=1]
load i32, i32* %5, align 1 ; <i32>:6 [#uses=1]
br label %7
; <label>:7 ; preds = %9, %1
%.01 = phi <4 x float> [ undef, %1 ], [ %12, %9 ] ; <<4 x float>> [#uses=1]
%.0 = phi i32 [ %3, %1 ], [ %15, %9 ] ; <i32> [#uses=3]
icmp slt i32 %.0, %6 ; <i1>:8 [#uses=1]
br i1 %8, label %9, label %16
; <label>:9 ; preds = %7
sitofp i32 %.0 to float ; <float>:10 [#uses=1]
insertelement <4 x float> %.01, float %10, i32 0 ; <<4 x float>>:11 [#uses=1]
shufflevector <4 x float> %11, <4 x float> undef, <4 x i32> zeroinitializer ; <<4 x float>>:12 [#uses=2]
getelementptr i8, i8* %0, i32 48 ; <i8*>:13 [#uses=1]
bitcast i8* %13 to <4 x float>* ; <<4 x float>*>:14 [#uses=1]
store <4 x float> %12, <4 x float>* %14, align 16
add i32 %.0, 2 ; <i32>:15 [#uses=1]
br label %7
; <label>:16 ; preds = %7
ret void
}
|
