1 ; RUN: opt < %s -inline -S | FileCheck %s 2 3 ; Inlining a byval struct should cause an explicit copy into an alloca. 4 5 %struct.ss = type { i32, i64 } 6 @.str = internal constant [10 x i8] c"%d, %lld\0A\00" ; <[10 x i8]*> [#uses=1] 7 8 define internal void @f(%struct.ss* byval %b) nounwind { 9 entry: 10 %tmp = getelementptr %struct.ss* %b, i32 0, i32 0 ; <i32*> [#uses=2] 11 %tmp1 = load i32* %tmp, align 4 ; <i32> [#uses=1] 12 %tmp2 = add i32 %tmp1, 1 ; <i32> [#uses=1] 13 store i32 %tmp2, i32* %tmp, align 4 14 ret void 15 } 16 17 declare i32 @printf(i8*, ...) nounwind 18 19 define i32 @test1() nounwind { 20 entry: 21 %S = alloca %struct.ss ; <%struct.ss*> [#uses=4] 22 %tmp1 = getelementptr %struct.ss* %S, i32 0, i32 0 ; <i32*> [#uses=1] 23 store i32 1, i32* %tmp1, align 8 24 %tmp4 = getelementptr %struct.ss* %S, i32 0, i32 1 ; <i64*> [#uses=1] 25 store i64 2, i64* %tmp4, align 4 26 call void @f( %struct.ss* byval %S ) nounwind 27 ret i32 0 28 ; CHECK: @test1() 29 ; CHECK: %S1 = alloca %struct.ss 30 ; CHECK: %S = alloca %struct.ss 31 ; CHECK: call void @llvm.memcpy 32 ; CHECK: ret i32 0 33 } 34 35 ; Inlining a byval struct should NOT cause an explicit copy 36 ; into an alloca if the function is readonly 37 38 define internal i32 @f2(%struct.ss* byval %b) nounwind readonly { 39 entry: 40 %tmp = getelementptr %struct.ss* %b, i32 0, i32 0 ; <i32*> [#uses=2] 41 %tmp1 = load i32* %tmp, align 4 ; <i32> [#uses=1] 42 %tmp2 = add i32 %tmp1, 1 ; <i32> [#uses=1] 43 ret i32 %tmp2 44 } 45 46 define i32 @test2() nounwind { 47 entry: 48 %S = alloca %struct.ss ; <%struct.ss*> [#uses=4] 49 %tmp1 = getelementptr %struct.ss* %S, i32 0, i32 0 ; <i32*> [#uses=1] 50 store i32 1, i32* %tmp1, align 8 51 %tmp4 = getelementptr %struct.ss* %S, i32 0, i32 1 ; <i64*> [#uses=1] 52 store i64 2, i64* %tmp4, align 4 53 %X = call i32 @f2( %struct.ss* byval %S ) nounwind 54 ret i32 %X 55 ; CHECK: @test2() 56 ; CHECK: %S = alloca %struct.ss 57 ; CHECK-NOT: call void @llvm.memcpy 58 ; CHECK: ret i32 59 } 60 61 62 ; Inlining a byval with an explicit alignment needs to use *at least* that 63 ; alignment on the generated alloca. 64 ; PR8769 65 declare void @g3(%struct.ss* %p) 66 67 define internal void @f3(%struct.ss* byval align 64 %b) nounwind { 68 call void @g3(%struct.ss* %b) ;; Could make alignment assumptions! 69 ret void 70 } 71 72 define void @test3() nounwind { 73 entry: 74 %S = alloca %struct.ss, align 1 ;; May not be aligned. 75 call void @f3( %struct.ss* byval align 64 %S) nounwind 76 ret void 77 ; CHECK: @test3() 78 ; CHECK: %S1 = alloca %struct.ss, align 64 79 ; CHECK: %S = alloca %struct.ss 80 ; CHECK: call void @llvm.memcpy 81 ; CHECK: call void @g3(%struct.ss* %S1) 82 ; CHECK: ret void 83 } 84 85 86 ; Inlining a byval struct should NOT cause an explicit copy 87 ; into an alloca if the function is readonly, but should increase an alloca's 88 ; alignment to satisfy an explicit alignment request. 89 90 define internal i32 @f4(%struct.ss* byval align 64 %b) nounwind readonly { 91 call void @g3(%struct.ss* %b) 92 ret i32 4 93 } 94 95 define i32 @test4() nounwind { 96 entry: 97 %S = alloca %struct.ss, align 2 ; <%struct.ss*> [#uses=4] 98 %X = call i32 @f4( %struct.ss* byval align 64 %S ) nounwind 99 ret i32 %X 100 ; CHECK: @test4() 101 ; CHECK: %S = alloca %struct.ss, align 64 102 ; CHECK-NOT: call void @llvm.memcpy 103 ; CHECK: call void @g3 104 ; CHECK: ret i32 4 105 } 106 107
