1 ; RUN: opt < %s -instcombine -S | FileCheck %s
2 target datalayout = "E-p:64:64:64-p1:32:32:32-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
4 ; Instcombine should be able to prove vector alignment in the
5 ; presence of a few mild address computation tricks.
10 define void @test0(i8* %b, i64 %n, i64 %u, i64 %y) nounwind {
12 %c = ptrtoint i8* %b to i64
14 %e = inttoptr i64 %d to double*
17 %t1421 = icmp eq i64 %n, 0
18 br i1 %t1421, label %return, label %bb
21 %i = phi i64 [ %indvar.next, %bb ], [ 20, %entry ]
24 %t8 = getelementptr double, double* %e, i64 %h
25 %p = bitcast double* %t8 to <2 x double>*
26 store <2 x double><double 0.0, double 0.0>, <2 x double>* %p, align 8
27 %indvar.next = add i64 %i, 1
28 %exitcond = icmp eq i64 %indvar.next, %n
29 br i1 %exitcond, label %return, label %bb
35 ; When we see a unaligned load from an insufficiently aligned global or
36 ; alloca, increase the alignment of the load, turning it into an aligned load.
38 ; CHECK-LABEL: @test1(
40 ; CHECK: GLOBAL{{.*}}align 16
42 @GLOBAL = internal global [4 x i32] zeroinitializer
44 define <16 x i8> @test1(<2 x i64> %x) {
46 %tmp = load <16 x i8>, <16 x i8>* bitcast ([4 x i32]* @GLOBAL to <16 x i8>*), align 1
50 @GLOBAL_as1 = internal addrspace(1) global [4 x i32] zeroinitializer
52 define <16 x i8> @test1_as1(<2 x i64> %x) {
53 ; CHECK-LABEL: @test1_as1(
55 ; CHECK: GLOBAL_as1{{.*}}align 16
56 %tmp = load <16 x i8>, <16 x i8> addrspace(1)* bitcast ([4 x i32] addrspace(1)* @GLOBAL_as1 to <16 x i8> addrspace(1)*), align 1
60 @GLOBAL_as1_gep = internal addrspace(1) global [8 x i32] zeroinitializer
62 define <16 x i8> @test1_as1_gep(<2 x i64> %x) {
63 ; CHECK-LABEL: @test1_as1_gep(
65 ; CHECK: GLOBAL_as1_gep{{.*}}align 16
66 %tmp = load <16 x i8>, <16 x i8> addrspace(1)* bitcast (i32 addrspace(1)* getelementptr ([8 x i32], [8 x i32] addrspace(1)* @GLOBAL_as1_gep, i16 0, i16 4) to <16 x i8> addrspace(1)*), align 1
71 ; When a load or store lacks an explicit alignment, add one.
73 ; CHECK-LABEL: @test2(
74 ; CHECK: load double, double* %p, align 8
75 ; CHECK: store double %n, double* %p, align 8
77 define double @test2(double* %p, double %n) nounwind {
78 %t = load double, double* %p
79 store double %n, double* %p
83 declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) nounwind
85 declare void @use(i8*)
87 %struct.s = type { i32, i32, i32, i32 }
89 define void @test3(%struct.s* sret %a4) {
90 ; Check that the alignment is bumped up the alignment of the sret type.
91 ; CHECK-LABEL: @test3(
92 %a4.cast = bitcast %struct.s* %a4 to i8*
93 call void @llvm.memset.p0i8.i64(i8* %a4.cast, i8 0, i64 16, i1 false)
94 ; CHECK: call void @llvm.memset.p0i8.i64(i8* align 4 %a4.cast, i8 0, i64 16, i1 false)
95 call void @use(i8* %a4.cast)