| ; RUN: opt < %s -instcombine -S -data-layout="E-p:64:64:64-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" | FileCheck %s -check-prefix=CHECK -check-prefix=ALL |
| ; RUN: opt < %s -instcombine -S -data-layout="E-p: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" | FileCheck %s -check-prefix=P32 -check-prefix=ALL |
| ; RUN: opt < %s -instcombine -S | FileCheck %s -check-prefix=NODL -check-prefix=ALL |
| |
| |
| declare void @use(...) |
| |
| @int = global i32 zeroinitializer |
| |
| ; Zero byte allocas should be merged if they can't be deleted. |
| ; CHECK-LABEL: @test( |
| ; CHECK: alloca |
| ; CHECK-NOT: alloca |
| define void @test() { |
| %X = alloca [0 x i32] ; <[0 x i32]*> [#uses=1] |
| call void (...) @use( [0 x i32]* %X ) |
| %Y = alloca i32, i32 0 ; <i32*> [#uses=1] |
| call void (...) @use( i32* %Y ) |
| %Z = alloca { } ; <{ }*> [#uses=1] |
| call void (...) @use( { }* %Z ) |
| %size = load i32, i32* @int |
| %A = alloca {{}}, i32 %size |
| call void (...) @use( {{}}* %A ) |
| ret void |
| } |
| |
| ; Zero byte allocas should be deleted. |
| ; CHECK-LABEL: @test2( |
| ; CHECK-NOT: alloca |
| define void @test2() { |
| %A = alloca i32 ; <i32*> [#uses=1] |
| store i32 123, i32* %A |
| ret void |
| } |
| |
| ; Zero byte allocas should be deleted. |
| ; CHECK-LABEL: @test3( |
| ; CHECK-NOT: alloca |
| define void @test3() { |
| %A = alloca { i32 } ; <{ i32 }*> [#uses=1] |
| %B = getelementptr { i32 }, { i32 }* %A, i32 0, i32 0 ; <i32*> [#uses=1] |
| store i32 123, i32* %B |
| ret void |
| } |
| |
| ; CHECK-LABEL: @test4( |
| ; CHECK: = zext i32 %n to i64 |
| ; CHECK: %A = alloca i32, i64 % |
| define i32* @test4(i32 %n) { |
| %A = alloca i32, i32 %n |
| ret i32* %A |
| } |
| |
| ; Allocas which are only used by GEPs, bitcasts, addrspacecasts, and stores |
| ; (transitively) should be deleted. |
| define void @test5() { |
| ; CHECK-LABEL: @test5( |
| ; CHECK-NOT: alloca |
| ; CHECK-NOT: store |
| ; CHECK: ret |
| |
| entry: |
| %a = alloca { i32 } |
| %b = alloca i32* |
| %c = alloca i32 |
| %a.1 = getelementptr { i32 }, { i32 }* %a, i32 0, i32 0 |
| store i32 123, i32* %a.1 |
| store i32* %a.1, i32** %b |
| %b.1 = bitcast i32** %b to i32* |
| store i32 123, i32* %b.1 |
| %a.2 = getelementptr { i32 }, { i32 }* %a, i32 0, i32 0 |
| store atomic i32 2, i32* %a.2 unordered, align 4 |
| %a.3 = getelementptr { i32 }, { i32 }* %a, i32 0, i32 0 |
| store atomic i32 3, i32* %a.3 release, align 4 |
| %a.4 = getelementptr { i32 }, { i32 }* %a, i32 0, i32 0 |
| store atomic i32 4, i32* %a.4 seq_cst, align 4 |
| %c.1 = addrspacecast i32* %c to i32 addrspace(1)* |
| store i32 123, i32 addrspace(1)* %c.1 |
| ret void |
| } |
| |
| declare void @f(i32* %p) |
| |
| ; Check that we don't delete allocas in some erroneous cases. |
| define void @test6() { |
| ; CHECK-LABEL: @test6( |
| ; CHECK-NOT: ret |
| ; CHECK: alloca |
| ; CHECK-NEXT: alloca |
| ; CHECK: ret |
| |
| entry: |
| %a = alloca { i32 } |
| %b = alloca i32 |
| %a.1 = getelementptr { i32 }, { i32 }* %a, i32 0, i32 0 |
| store volatile i32 123, i32* %a.1 |
| tail call void @f(i32* %b) |
| ret void |
| } |
| |
| ; PR14371 |
| %opaque_type = type opaque |
| %real_type = type { { i32, i32* } } |
| |
| @opaque_global = external constant %opaque_type, align 4 |
| |
| define void @test7() { |
| entry: |
| %0 = alloca %real_type, align 4 |
| %1 = bitcast %real_type* %0 to i8* |
| call void @llvm.memcpy.p0i8.p0i8.i32(i8* %1, i8* bitcast (%opaque_type* @opaque_global to i8*), i32 8, i1 false) |
| ret void |
| } |
| |
| declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i1) nounwind |
| |
| |
| ; Check that the GEP indices use the pointer size, or 64 if unknown |
| define void @test8() { |
| ; CHECK-LABEL: @test8( |
| ; CHECK: alloca [100 x i32] |
| ; CHECK: getelementptr inbounds [100 x i32], [100 x i32]* %x1, i64 0, i64 0 |
| |
| ; P32-LABEL: @test8( |
| ; P32: alloca [100 x i32] |
| ; P32: getelementptr inbounds [100 x i32], [100 x i32]* %x1, i32 0, i32 0 |
| |
| ; NODL-LABEL: @test8( |
| ; NODL: alloca [100 x i32] |
| ; NODL: getelementptr inbounds [100 x i32], [100 x i32]* %x1, i64 0, i64 0 |
| %x = alloca i32, i32 100 |
| call void (...) @use(i32* %x) |
| ret void |
| } |
| |
| ; PR19569 |
| %struct_type = type { i32, i32 } |
| declare void @test9_aux(<{ %struct_type }>* inalloca) |
| declare i8* @llvm.stacksave() |
| declare void @llvm.stackrestore(i8*) |
| |
| define void @test9(%struct_type* %a) { |
| ; CHECK-LABEL: @test9( |
| entry: |
| %inalloca.save = call i8* @llvm.stacksave() |
| %argmem = alloca inalloca <{ %struct_type }> |
| ; CHECK: alloca inalloca i64, align 8 |
| %0 = getelementptr inbounds <{ %struct_type }>, <{ %struct_type }>* %argmem, i32 0, i32 0 |
| %1 = bitcast %struct_type* %0 to i8* |
| %2 = bitcast %struct_type* %a to i8* |
| call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %1, i8* align 4 %2, i32 8, i1 false) |
| call void @test9_aux(<{ %struct_type }>* inalloca %argmem) |
| call void @llvm.stackrestore(i8* %inalloca.save) |
| ret void |
| } |
| |
| define void @test10() { |
| entry: |
| ; ALL-LABEL: @test10( |
| ; ALL: %v32 = alloca i1, align 8 |
| ; ALL: %v64 = alloca i1, align 8 |
| ; ALL: %v33 = alloca i1, align 8 |
| %v32 = alloca i1, align 8 |
| %v64 = alloca i1, i64 1, align 8 |
| %v33 = alloca i1, i33 1, align 8 |
| call void (...) @use(i1* %v32, i1* %v64, i1* %v33) |
| ret void |
| } |
| |
| define void @test11() { |
| entry: |
| ; ALL-LABEL: @test11( |
| ; ALL: %y = alloca i32 |
| ; ALL: call void (...) @use(i32* nonnull @int) [ "blah"(i32* %y) ] |
| ; ALL: ret void |
| %y = alloca i32 |
| call void (...) @use(i32* nonnull @int) [ "blah"(i32* %y) ] |
| ret void |
| } |