source: icGREP/icgrep-devel/llvm-3.8.0.src/test/CodeGen/ARM/2013-10-11-select-stalls.ll @ 5027

Last change on this file since 5027 was 5027, checked in by cameron, 3 years ago

Upgrade to llvm 3.8

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1; REQUIRES: asserts
2; RUN: llc < %s -mtriple=thumbv7-apple-ios -disable-ifcvt-diamond -stats 2>&1 | FileCheck %s
3; Evaluate the two vld1.8 instructions in separate MBB's,
4; instead of stalling on one and conditionally overwriting its result.
5;
6; Update: After if-conversion the two vld1.8 instructions are in the same MBB
7; again. So we disable this if-conversion to eliminate its influence to this
8; test.
9
10; CHECK-NOT: Number of pipeline stalls
11define <16 x i8> @multiselect(i32 %avail, i8* %foo, i8* %bar) {
12entry:
13  %vld1 = call <16 x i8> @llvm.arm.neon.vld1.v16i8.p0i8(i8* %foo, i32 1)
14  %vld2 = call <16 x i8> @llvm.arm.neon.vld1.v16i8.p0i8(i8* %bar, i32 1)
15  %and = and i32 %avail, 3
16  %tobool = icmp eq i32 %and, 0
17  %retv = select i1 %tobool, <16 x i8> %vld1, <16 x i8> %vld2
18  ret <16 x i8> %retv
19}
20
21declare <16 x i8> @llvm.arm.neon.vld1.v16i8.p0i8(i8* , i32 )
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