1 ; RUN: opt < %s -deadargelim -S | FileCheck %s 2 3 %Ty = type <{ i32, i32 }> 4 5 ; Check if the pass doesn't modify anything that doesn't need changing. We feed 6 ; an unused argument to each function to lure it into changing _something_ about 7 ; the function and then changing too much. 8 9 ; This checks if the return value attributes are not removed 10 ; CHECK: define internal zeroext i32 @test1() #0 11 define internal zeroext i32 @test1(i32 %DEADARG1) nounwind { 12 ret i32 1 13 } 14 15 ; This checks if the struct doesn't get non-packed 16 ; CHECK-LABEL: define internal <{ i32, i32 }> @test2( 17 define internal <{ i32, i32 }> @test2(i32 %DEADARG1) { 18 ret <{ i32, i32 }> <{ i32 1, i32 2 }> 19 } 20 21 ; We use this external function to make sure the return values don't become dead 22 declare void @user(i32, <{ i32, i32 }>) 23 24 define void @caller() { 25 %B = call i32 @test1(i32 1) 26 %C = call <{ i32, i32 }> @test2(i32 2) 27 call void @user(i32 %B, <{ i32, i32 }> %C) 28 ret void 29 } 30 31 ; We can't remove 'this' here, as that would put argmem in ecx instead of 32 ; memory. 33 define internal x86_thiscallcc i32 @unused_this(i32* %this, i32* inalloca %argmem) { 34 %v = load i32* %argmem 35 ret i32 %v 36 } 37 ; CHECK-LABEL: define internal x86_thiscallcc i32 @unused_this(i32* %this, i32* inalloca %argmem) 38 39 define i32 @caller2() { 40 %t = alloca i32 41 %m = alloca inalloca i32 42 store i32 42, i32* %m 43 %v = call x86_thiscallcc i32 @unused_this(i32* %t, i32* inalloca %m) 44 ret i32 %v 45 } 46 47 ; CHECK: attributes #0 = { nounwind } 48
