1 ; RUN: opt -instcombine -S < %s | FileCheck %s
3 target datalayout = "e-m:e-p:64:64:64-i64:64-f80:128-n8:16:32:64-S128"
5 define i32 @test_load_cast_combine_tbaa(float* %ptr) {
6 ; Ensure (cast (load (...))) -> (load (cast (...))) preserves TBAA.
7 ; CHECK-LABEL: @test_load_cast_combine_tbaa(
8 ; CHECK: load i32, i32* %{{.*}}, !tbaa !0
10 %l = load float, float* %ptr, !tbaa !0
11 %c = bitcast float %l to i32
15 define i32 @test_load_cast_combine_noalias(float* %ptr) {
16 ; Ensure (cast (load (...))) -> (load (cast (...))) preserves no-alias metadata.
17 ; CHECK-LABEL: @test_load_cast_combine_noalias(
18 ; CHECK: load i32, i32* %{{.*}}, !alias.scope !2, !noalias !1
20 %l = load float, float* %ptr, !alias.scope !2, !noalias !1
21 %c = bitcast float %l to i32
25 define float @test_load_cast_combine_range(i32* %ptr) {
26 ; Ensure (cast (load (...))) -> (load (cast (...))) drops range metadata. It
27 ; would be nice to preserve or update it somehow but this is hard when moving
29 ; CHECK-LABEL: @test_load_cast_combine_range(
30 ; CHECK: load float, float* %{{.*}}
34 %l = load i32, i32* %ptr, !range !5
35 %c = bitcast i32 %l to float
39 define i32 @test_load_cast_combine_invariant(float* %ptr) {
40 ; Ensure (cast (load (...))) -> (load (cast (...))) preserves invariant metadata.
41 ; CHECK-LABEL: @test_load_cast_combine_invariant(
42 ; CHECK: load i32, i32* %{{.*}}, !invariant.load !3
44 %l = load float, float* %ptr, !invariant.load !3
45 %c = bitcast float %l to i32
49 define i32 @test_load_cast_combine_nontemporal(float* %ptr) {
50 ; Ensure (cast (load (...))) -> (load (cast (...))) preserves nontemporal
52 ; CHECK-LABEL: @test_load_cast_combine_nontemporal(
53 ; CHECK: load i32, i32* %{{.*}}, !nontemporal !4
55 %l = load float, float* %ptr, !nontemporal !4
56 %c = bitcast float %l to i32
60 define void @test_load_cast_combine_loop(float* %src, i32* %dst, i32 %n) {
61 ; Ensure (cast (load (...))) -> (load (cast (...))) preserves loop access
63 ; CHECK-LABEL: @test_load_cast_combine_loop(
64 ; CHECK: load i32, i32* %{{.*}}, !llvm.mem.parallel_loop_access !1
69 %i = phi i32 [ 0, %entry ], [ %i.next, %loop ]
70 %src.gep = getelementptr inbounds float, float* %src, i32 %i
71 %dst.gep = getelementptr inbounds i32, i32* %dst, i32 %i
72 %l = load float, float* %src.gep, !llvm.mem.parallel_loop_access !1
73 %c = bitcast float %l to i32
74 store i32 %c, i32* %dst.gep
75 %i.next = add i32 %i, 1
76 %cmp = icmp slt i32 %i.next, %n
77 br i1 %cmp, label %loop, label %exit, !llvm.loop !1
83 define void @test_load_cast_combine_nonnull(float** %ptr) {
84 ; We can't preserve nonnull metadata when converting a load of a pointer to
85 ; a load of an integer. Instead, we translate it to range metadata.
86 ; FIXME: We should also transform range metadata back into nonnull metadata.
87 ; FIXME: This test is very fragile. If any LABEL lines are added after
88 ; this point, the test will fail, because this test depends on a metadata tuple,
89 ; which is always emitted at the end of the file. At some point, we should
90 ; consider an option to the IR printer to emit MD tuples after the function
91 ; that first uses them--this will allow us to refer to them like this and not
92 ; have the tests break. For now, this function must always come last in this
93 ; file, and no LABEL lines are to be added after this point.
95 ; CHECK-LABEL: @test_load_cast_combine_nonnull(
96 ; CHECK: %[[V:.*]] = load i64, i64* %{{.*}}, !range ![[MD:[0-9]+]]
98 ; CHECK: store i64 %[[V]], i64*
100 %p = load float*, float** %ptr, !nonnull !3
101 %gep = getelementptr float*, float** %ptr, i32 42
102 store float* %p, float** %gep
106 ; This is the metadata tuple that we reference above:
107 ; CHECK: ![[MD]] = !{i64 1, i64 0}
108 !0 = !{ !1, !1, i64 0 }
113 !5 = !{ i32 0, i32 42 }