1; RUN: llc < %s | FileCheck %s
2
3target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
4target triple = "x86_64-unknown-unknown"
5
6define void @PR22524({ float, float }* %arg) {
7; Check that we can materialize the zero constants we store in two places here,
8; and at least form a legal store of the floating point value at the end.
9; The DAG combiner at one point contained bugs that given enough permutations
10; would incorrectly form an illegal operation for the last of these stores when
11; it folded it to a zero too late to legalize the zero store operation. If this
12; ever starts forming a zero store instead of movss, the test case has stopped
13; being useful.
14;
15; CHECK-LABEL: PR22524:
16entry:
17  %0 = getelementptr inbounds { float, float }* %arg,  i32 0, i32 1
18  store float 0.000000e+00, float* %0, align 4
19; CHECK: movl $0, 4(%rdi)
20
21  %1 = getelementptr inbounds { float, float }* %arg, i64 0,  i32 0
22  %2 = bitcast float* %1 to i64*
23  %3 = load i64* %2, align 8
24  %4 = trunc i64 %3 to i32
25  %5 = lshr i64 %3, 32
26  %6 = trunc i64 %5 to i32
27  %7 = bitcast i32 %6 to float
28  %8 = fmul float %7, 0.000000e+00
29  %9 = bitcast float* %1 to i32*
30  store i32 %6, i32* %9, align 4
31; CHECK: movl $0, (%rdi)
32  store float %8, float* %0, align 4
33; CHECK: movss %{{.*}}, 4(%rdi)
34  ret void
35}
36