1; Ignore stderr, we expect warnings there 2; RUN: opt < %s -instcombine 2> /dev/null -S | FileCheck %s 3 4target datalayout = "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" 5 6; Simple case, argument translatable without changing the value 7declare void @test1a(i8*) 8 9define void @test1(i32* %A) { 10 call void bitcast (void (i8*)* @test1a to void (i32*)*)( i32* %A ) 11 ret void 12; CHECK: %1 = bitcast i32* %A to i8* 13; CHECK: call void @test1a(i8* %1) 14; CHECK: ret void 15} 16 17; More complex case, translate argument because of resolution. This is safe 18; because we have the body of the function 19define void @test2a(i8 %A) { 20 ret void 21; CHECK: ret void 22} 23 24define i32 @test2(i32 %A) { 25 call void bitcast (void (i8)* @test2a to void (i32)*)( i32 %A ) 26 ret i32 %A 27; CHECK: %1 = trunc i32 %A to i8 28; CHECK: call void @test2a(i8 %1) 29; CHECK: ret i32 %A 30} 31 32 33; Resolving this should insert a cast from sbyte to int, following the C 34; promotion rules. 35define void @test3a(i8, ...) {unreachable } 36 37define void @test3(i8 %A, i8 %B) { 38 call void bitcast (void (i8, ...)* @test3a to void (i8, i8)*)( i8 %A, i8 %B 39) 40 ret void 41; CHECK: %1 = zext i8 %B to i32 42; CHECK: call void (i8, ...)* @test3a(i8 %A, i32 %1) 43; CHECK: ret void 44} 45 46 47; test conversion of return value... 48define i8 @test4a() { 49 ret i8 0 50; CHECK: ret i8 0 51} 52 53define i32 @test4() { 54 %X = call i32 bitcast (i8 ()* @test4a to i32 ()*)( ) ; <i32> [#uses=1] 55 ret i32 %X 56; CHECK: %X = call i8 @test4a() 57; CHECK: %1 = zext i8 %X to i32 58; CHECK: ret i32 %1 59} 60 61 62; test conversion of return value... no value conversion occurs so we can do 63; this with just a prototype... 64declare i32 @test5a() 65 66define i32 @test5() { 67 %X = call i32 @test5a( ) ; <i32> [#uses=1] 68 ret i32 %X 69; CHECK: %X = call i32 @test5a() 70; CHECK: ret i32 %X 71} 72 73 74; test addition of new arguments... 75declare i32 @test6a(i32) 76 77define i32 @test6() { 78 %X = call i32 bitcast (i32 (i32)* @test6a to i32 ()*)( ) 79 ret i32 %X 80; CHECK: %X = call i32 @test6a(i32 0) 81; CHECK: ret i32 %X 82} 83 84 85; test removal of arguments, only can happen with a function body 86define void @test7a() { 87 ret void 88; CHECK: ret void 89} 90 91define void @test7() { 92 call void bitcast (void ()* @test7a to void (i32)*)( i32 5 ) 93 ret void 94; CHECK: call void @test7a() 95; CHECK: ret void 96} 97 98 99; rdar://7590304 100declare void @test8a() 101 102define i8* @test8() { 103 invoke void @test8a() 104 to label %invoke.cont unwind label %try.handler 105 106invoke.cont: ; preds = %entry 107 unreachable 108 109try.handler: ; preds = %entry 110 %exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0 111 cleanup 112 ret i8* null 113} 114 115declare i32 @__gxx_personality_v0(...) 116 117; Don't turn this into "unreachable": the callee and caller don't agree in 118; calling conv, but the implementation of test8a may actually end up using the 119; right calling conv. 120; CHECK: @test8() { 121; CHECK-NEXT: invoke void @test8a() 122 123 124 125; Don't turn this into a direct call, because test9x is just a prototype and 126; doing so will make it varargs. 127; rdar://9038601 128declare i8* @test9x(i8*, i8*, ...) noredzone 129define i8* @test9(i8* %arg, i8* %tmp3) nounwind ssp noredzone { 130entry: 131 %call = call i8* bitcast (i8* (i8*, i8*, ...)* @test9x to i8* (i8*, i8*)*)(i8* %arg, i8* %tmp3) noredzone 132 ret i8* %call 133; CHECK: @test9( 134; CHECK: call i8* bitcast 135} 136 137