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 8define internal void @f(%struct.ss* byval %b) nounwind { 9entry: 10 %tmp = getelementptr %struct.ss, %struct.ss* %b, i32 0, i32 0 ; <i32*> [#uses=2] 11 %tmp1 = load i32, 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 17declare i32 @printf(i8*, ...) nounwind 18 19define i32 @test1() nounwind { 20entry: 21 %S = alloca %struct.ss ; <%struct.ss*> [#uses=4] 22 %tmp1 = getelementptr %struct.ss, %struct.ss* %S, i32 0, i32 0 ; <i32*> [#uses=1] 23 store i32 1, i32* %tmp1, align 8 24 %tmp4 = getelementptr %struct.ss, %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 38define internal i32 @f2(%struct.ss* byval %b) nounwind readonly { 39entry: 40 %tmp = getelementptr %struct.ss, %struct.ss* %b, i32 0, i32 0 ; <i32*> [#uses=2] 41 %tmp1 = load i32, i32* %tmp, align 4 ; <i32> [#uses=1] 42 %tmp2 = add i32 %tmp1, 1 ; <i32> [#uses=1] 43 ret i32 %tmp2 44} 45 46define i32 @test2() nounwind { 47entry: 48 %S = alloca %struct.ss ; <%struct.ss*> [#uses=4] 49 %tmp1 = getelementptr %struct.ss, %struct.ss* %S, i32 0, i32 0 ; <i32*> [#uses=1] 50 store i32 1, i32* %tmp1, align 8 51 %tmp4 = getelementptr %struct.ss, %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 65declare void @g3(%struct.ss* %p) 66 67define 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 72define void @test3() nounwind { 73entry: 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 90define internal i32 @f4(%struct.ss* byval align 64 %b) nounwind readonly { 91 call void @g3(%struct.ss* %b) 92 ret i32 4 93} 94 95define i32 @test4() nounwind { 96entry: 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%struct.S0 = type { i32 } 108 109@b = global %struct.S0 { i32 1 }, align 4 110@a = common global i32 0, align 4 111 112define internal void @f5(%struct.S0* byval nocapture readonly align 4 %p) { 113entry: 114 store i32 0, i32* getelementptr inbounds (%struct.S0, %struct.S0* @b, i64 0, i32 0), align 4 115 %f2 = getelementptr inbounds %struct.S0, %struct.S0* %p, i64 0, i32 0 116 %0 = load i32, i32* %f2, align 4 117 store i32 %0, i32* @a, align 4 118 ret void 119} 120 121define i32 @test5() { 122entry: 123 tail call void @f5(%struct.S0* byval align 4 @b) 124 %0 = load i32, i32* @a, align 4 125 ret i32 %0 126; CHECK: @test5() 127; CHECK: store i32 0, i32* getelementptr inbounds (%struct.S0, %struct.S0* @b, i64 0, i32 0), align 4 128; CHECK-NOT: load i32, i32* getelementptr inbounds (%struct.S0, %struct.S0* @b, i64 0, i32 0), align 4 129} 130