; RUN: opt < %s -instcombine -S | FileCheck %s
target datalayout = "e-p:64:64"
%intstruct = type { i32 }
%pair = type { i32, i32 }
%struct.B = type { double }
%struct.A = type { %struct.B, i32, i32 }
@Global = constant [10 x i8] c"helloworld"
; Test noop elimination
define i32* @test1(i32* %I) {
%A = getelementptr i32* %I, i64 0
ret i32* %A
; CHECK: @test1
; CHECK: ret i32* %I
}
; Test noop elimination
define i32* @test2(i32* %I) {
%A = getelementptr i32* %I
ret i32* %A
; CHECK: @test2
; CHECK: ret i32* %I
}
; Test that two array indexing geps fold
define i32* @test3(i32* %I) {
%A = getelementptr i32* %I, i64 17
%B = getelementptr i32* %A, i64 4
ret i32* %B
; CHECK: @test3
; CHECK: getelementptr i32* %I, i64 21
}
; Test that two getelementptr insts fold
define i32* @test4({ i32 }* %I) {
%A = getelementptr { i32 }* %I, i64 1
%B = getelementptr { i32 }* %A, i64 0, i32 0
ret i32* %B
; CHECK: @test4
; CHECK: getelementptr { i32 }* %I, i64 1, i32 0
}
define void @test5(i8 %B) {
; This should be turned into a constexpr instead of being an instruction
%A = getelementptr [10 x i8]* @Global, i64 0, i64 4
store i8 %B, i8* %A
ret void
; CHECK: @test5
; CHECK: store i8 %B, i8* getelementptr inbounds ([10 x i8]* @Global, i64 0, i64 4)
}
define i32* @test7(i32* %I, i64 %C, i64 %D) {
%A = getelementptr i32* %I, i64 %C
%B = getelementptr i32* %A, i64 %D
ret i32* %B
; CHECK: @test7
; CHECK: %A.sum = add i64 %C, %D
; CHECK: getelementptr i32* %I, i64 %A.sum
}
define i8* @test8([10 x i32]* %X) {
;; Fold into the cast.
%A = getelementptr [10 x i32]* %X, i64 0, i64 0
%B = bitcast i32* %A to i8*
ret i8* %B
; CHECK: @test8
; CHECK: bitcast [10 x i32]* %X to i8*
}
define i32 @test9() {
%A = getelementptr { i32, double }* null, i32 0, i32 1
%B = ptrtoint double* %A to i32
ret i32 %B
; CHECK: @test9
; CHECK: ret i32 8
}
define i1 @test10({ i32, i32 }* %x, { i32, i32 }* %y) {
%tmp.1 = getelementptr { i32, i32 }* %x, i32 0, i32 1
%tmp.3 = getelementptr { i32, i32 }* %y, i32 0, i32 1
;; seteq x, y
%tmp.4 = icmp eq i32* %tmp.1, %tmp.3
ret i1 %tmp.4
; CHECK: @test10
; CHECK: icmp eq { i32, i32 }* %x, %y
}
define i1 @test11({ i32, i32 }* %X) {
%P = getelementptr { i32, i32 }* %X, i32 0, i32 0
%Q = icmp eq i32* %P, null
ret i1 %Q
; CHECK: @test11
; CHECK: icmp eq { i32, i32 }* %X, null
}
; PR4748
define i32 @test12(%struct.A* %a) {
entry:
%g3 = getelementptr %struct.A* %a, i32 0, i32 1
store i32 10, i32* %g3, align 4
%g4 = getelementptr %struct.A* %a, i32 0, i32 0
%new_a = bitcast %struct.B* %g4 to %struct.A*
%g5 = getelementptr %struct.A* %new_a, i32 0, i32 1
%a_a = load i32* %g5, align 4
ret i32 %a_a
; CHECK: @test12
; CHECK: getelementptr %struct.A* %a, i64 0, i32 1
; CHECK-NEXT: store i32 10, i32* %g3
; CHECK-NEXT: ret i32 10
}
; PR2235
%S = type { i32, [ 100 x i32] }
define i1 @test13(i64 %X, %S* %P) {
%A = getelementptr inbounds %S* %P, i32 0, i32 1, i64 %X
%B = getelementptr inbounds %S* %P, i32 0, i32 0
%C = icmp eq i32* %A, %B
ret i1 %C
; CHECK: @test13
; CHECK: %C = icmp eq i64 %X, -1
}
@G = external global [3 x i8]
define i8* @test14(i32 %Idx) {
%idx = zext i32 %Idx to i64
%tmp = getelementptr i8* getelementptr ([3 x i8]* @G, i32 0, i32 0), i64 %idx
ret i8* %tmp
; CHECK: @test14
; CHECK: getelementptr [3 x i8]* @G, i64 0, i64 %idx
}
; Test folding of constantexpr geps into normal geps.
@Array = external global [40 x i32]
define i32 *@test15(i64 %X) {
%A = getelementptr i32* getelementptr ([40 x i32]* @Array, i64 0, i64 0), i64 %X
ret i32* %A
; CHECK: @test15
; CHECK: getelementptr [40 x i32]* @Array, i64 0, i64 %X
}
define i32* @test16(i32* %X, i32 %Idx) {
%R = getelementptr i32* %X, i32 %Idx
ret i32* %R
; CHECK: @test16
; CHECK: sext i32 %Idx to i64
}
define i1 @test17(i16* %P, i32 %I, i32 %J) {
%X = getelementptr inbounds i16* %P, i32 %I
%Y = getelementptr inbounds i16* %P, i32 %J
%C = icmp ult i16* %X, %Y
ret i1 %C
; CHECK: @test17
; CHECK: %C = icmp slt i32 %I, %J
}
define i1 @test18(i16* %P, i32 %I) {
%X = getelementptr inbounds i16* %P, i32 %I
%C = icmp ult i16* %X, %P
ret i1 %C
; CHECK: @test18
; CHECK: %C = icmp slt i32 %I, 0
}
define i32 @test19(i32* %P, i32 %A, i32 %B) {
%tmp.4 = getelementptr inbounds i32* %P, i32 %A
%tmp.9 = getelementptr inbounds i32* %P, i32 %B
%tmp.10 = icmp eq i32* %tmp.4, %tmp.9
%tmp.11 = zext i1 %tmp.10 to i32
ret i32 %tmp.11
; CHECK: @test19
; CHECK: icmp eq i32 %A, %B
}
define i32 @test20(i32* %P, i32 %A, i32 %B) {
%tmp.4 = getelementptr inbounds i32* %P, i32 %A
%tmp.6 = icmp eq i32* %tmp.4, %P
%tmp.7 = zext i1 %tmp.6 to i32
ret i32 %tmp.7
; CHECK: @test20
; CHECK: icmp eq i32 %A, 0
}
define i32 @test21() {
%pbob1 = alloca %intstruct
%pbob2 = getelementptr %intstruct* %pbob1
%pbobel = getelementptr %intstruct* %pbob2, i64 0, i32 0
%rval = load i32* %pbobel
ret i32 %rval
; CHECK: @test21
; CHECK: getelementptr %intstruct* %pbob1, i64 0, i32 0
}
@A = global i32 1 ; <i32*> [#uses=1]
@B = global i32 2 ; <i32*> [#uses=1]
define i1 @test22() {
%C = icmp ult i32* getelementptr (i32* @A, i64 1),
getelementptr (i32* @B, i64 2)
ret i1 %C
; CHECK: @test22
; CHECK: icmp ult (i32* getelementptr inbounds (i32* @A, i64 1), i32* getelementptr (i32* @B, i64 2))
}
%X = type { [10 x i32], float }
define i1 @test23() {
%A = getelementptr %X* null, i64 0, i32 0, i64 0 ; <i32*> [#uses=1]
%B = icmp ne i32* %A, null ; <i1> [#uses=1]
ret i1 %B
; CHECK: @test23
; CHECK: ret i1 false
}
define void @test25() {
entry:
%tmp = getelementptr { i64, i64, i64, i64 }* null, i32 0, i32 3 ; <i64*> [#uses=1]
%tmp.upgrd.1 = load i64* %tmp ; <i64> [#uses=1]
%tmp8.ui = load i64* null ; <i64> [#uses=1]
%tmp8 = bitcast i64 %tmp8.ui to i64 ; <i64> [#uses=1]
%tmp9 = and i64 %tmp8, %tmp.upgrd.1 ; <i64> [#uses=1]
%sext = trunc i64 %tmp9 to i32 ; <i32> [#uses=1]
%tmp27.i = sext i32 %sext to i64 ; <i64> [#uses=1]
tail call void @foo25( i32 0, i64 %tmp27.i )
unreachable
; CHECK: @test25
}
declare void @foo25(i32, i64)
; PR1637
define i1 @test26(i8* %arr) {
%X = getelementptr i8* %arr, i32 1
%Y = getelementptr i8* %arr, i32 1
%test = icmp uge i8* %X, %Y
ret i1 %test
; CHECK: @test26
; CHECK: ret i1 true
}
%struct.__large_struct = type { [100 x i64] }
%struct.compat_siginfo = type { i32, i32, i32, { [29 x i32] } }
%struct.siginfo_t = type { i32, i32, i32, { { i32, i32, [0 x i8], %struct.sigval_t, i32 }, [88 x i8] } }
%struct.sigval_t = type { i8* }
define i32 @test27(%struct.compat_siginfo* %to, %struct.siginfo_t* %from) {
entry:
%from_addr = alloca %struct.siginfo_t*
%tmp344 = load %struct.siginfo_t** %from_addr, align 8
%tmp345 = getelementptr %struct.siginfo_t* %tmp344, i32 0, i32 3
%tmp346 = getelementptr { { i32, i32, [0 x i8], %struct.sigval_t, i32 }, [88 x i8] }* %tmp345, i32 0, i32 0
%tmp346347 = bitcast { i32, i32, [0 x i8], %struct.sigval_t, i32 }* %tmp346 to { i32, i32, %struct.sigval_t }*
%tmp348 = getelementptr { i32, i32, %struct.sigval_t }* %tmp346347, i32 0, i32 2
%tmp349 = getelementptr %struct.sigval_t* %tmp348, i32 0, i32 0
%tmp349350 = bitcast i8** %tmp349 to i32*
%tmp351 = load i32* %tmp349350, align 8
%tmp360 = call i32 asm sideeffect "...",
"=r,ir,*m,i,0,~{dirflag},~{fpsr},~{flags}"( i32 %tmp351,
%struct.__large_struct* null, i32 -14, i32 0 )
unreachable
; CHECK: @test27
}
; PR1978
%struct.x = type <{ i8 }>
@.str = internal constant [6 x i8] c"Main!\00"
@.str1 = internal constant [12 x i8] c"destroy %p\0A\00"
define i32 @test28() nounwind {
entry:
%orientations = alloca [1 x [1 x %struct.x]]
%tmp3 = call i32 @puts( i8* getelementptr ([6 x i8]* @.str, i32 0, i32 0) ) nounwind
%tmp45 = getelementptr inbounds [1 x [1 x %struct.x]]* %orientations, i32 1, i32 0, i32 0
%orientations62 = getelementptr [1 x [1 x %struct.x]]* %orientations, i32 0, i32 0, i32 0
br label %bb10
bb10:
%indvar = phi i32 [ 0, %entry ], [ %indvar.next, %bb10 ]
%tmp.0.reg2mem.0.rec = mul i32 %indvar, -1
%tmp12.rec = add i32 %tmp.0.reg2mem.0.rec, -1
%tmp12 = getelementptr inbounds %struct.x* %tmp45, i32 %tmp12.rec
%tmp16 = call i32 (i8*, ...)* @printf( i8* getelementptr ([12 x i8]* @.str1, i32 0, i32 0), %struct.x* %tmp12 ) nounwind
%tmp84 = icmp eq %struct.x* %tmp12, %orientations62
%indvar.next = add i32 %indvar, 1
br i1 %tmp84, label %bb17, label %bb10
bb17:
ret i32 0
; CHECK: @test28
; CHECK: icmp eq i32 %indvar, 0
}
declare i32 @puts(i8*)
declare i32 @printf(i8*, ...)
; rdar://6762290
%T = type <{ i64, i64, i64 }>
define i32 @test29(i8* %start, i32 %X) nounwind {
entry:
%tmp3 = load i64* null
%add.ptr = getelementptr i8* %start, i64 %tmp3
%tmp158 = load i32* null
%add.ptr159 = getelementptr %T* null, i32 %tmp158
%add.ptr209 = getelementptr i8* %start, i64 0
%add.ptr212 = getelementptr i8* %add.ptr209, i32 %X
%cmp214 = icmp ugt i8* %add.ptr212, %add.ptr
br i1 %cmp214, label %if.then216, label %if.end363
if.then216:
ret i32 1
if.end363:
ret i32 0
; CHECK: @test29
}
; PR3694
define i32 @test30(i32 %m, i32 %n) nounwind {
entry:
%0 = alloca i32, i32 %n, align 4
%1 = bitcast i32* %0 to [0 x i32]*
call void @test30f(i32* %0) nounwind
%2 = getelementptr [0 x i32]* %1, i32 0, i32 %m
%3 = load i32* %2, align 4
ret i32 %3
; CHECK: @test30
; CHECK: getelementptr i32
}
declare void @test30f(i32*)
define i1 @test31(i32* %A) {
%B = getelementptr i32* %A, i32 1
%C = getelementptr i32* %A, i64 1
%V = icmp eq i32* %B, %C
ret i1 %V
; CHECK: @test31
; CHECK: ret i1 true
}
; PR1345
define i8* @test32(i8* %v) {
%A = alloca [4 x i8*], align 16
%B = getelementptr [4 x i8*]* %A, i32 0, i32 0
store i8* null, i8** %B
%C = bitcast [4 x i8*]* %A to { [16 x i8] }*
%D = getelementptr { [16 x i8] }* %C, i32 0, i32 0, i32 8
%E = bitcast i8* %D to i8**
store i8* %v, i8** %E
%F = getelementptr [4 x i8*]* %A, i32 0, i32 2
%G = load i8** %F
ret i8* %G
; CHECK: @test32
; CHECK: %D = getelementptr [4 x i8*]* %A, i64 0, i64 1
; CHECK: %F = getelementptr [4 x i8*]* %A, i64 0, i64 2
}
; PR3290
%struct.Key = type { { i32, i32 } }
%struct.anon = type <{ i8, [3 x i8], i32 }>
define i32 *@test33(%struct.Key *%A) {
%B = bitcast %struct.Key* %A to %struct.anon*
%C = getelementptr %struct.anon* %B, i32 0, i32 2
ret i32 *%C
; CHECK: @test33
; CHECK: getelementptr %struct.Key* %A, i64 0, i32 0, i32 1
}
%T2 = type { i8*, i8 }
define i8* @test34(i8* %Val, i64 %V) nounwind {
entry:
%A = alloca %T2, align 8
%mrv_gep = bitcast %T2* %A to i64*
%B = getelementptr %T2* %A, i64 0, i32 0
store i64 %V, i64* %mrv_gep
%C = load i8** %B, align 8
ret i8* %C
; CHECK: @test34
; CHECK: %V.c = inttoptr i64 %V to i8*
; CHECK: ret i8* %V.c
}
%t0 = type { i8*, [19 x i8] }
%t1 = type { i8*, [0 x i8] }
@array = external global [11 x i8]
@s = external global %t0
@"\01LC8" = external constant [17 x i8]
; Instcombine should be able to fold this getelementptr.
define i32 @test35() nounwind {
call i32 (i8*, ...)* @printf(i8* getelementptr ([17 x i8]* @"\01LC8", i32 0, i32 0),
i8* getelementptr (%t1* bitcast (%t0* @s to %t1*), i32 0, i32 1, i32 0)) nounwind
ret i32 0
; CHECK: @test35
; CHECK: call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([17 x i8]* @"\01LC8", i64 0, i64 0), i8* getelementptr inbounds (%t0* @s, i64 0, i32 1, i64 0)) nounwind
}
; Instcombine should constant-fold the GEP so that indices that have
; static array extents are within bounds of those array extents.
; In the below, -1 is not in the range [0,11). After the transformation,
; the same address is computed, but 3 is in the range of [0,11).
define i8* @test36() nounwind {
ret i8* getelementptr ([11 x i8]* @array, i32 0, i64 -1)
; CHECK: @test36
; CHECK: ret i8* getelementptr ([11 x i8]* @array, i64 1676976733973595601, i64 4)
}
; Instcombine shouldn't assume that gep(A,0,1) != gep(A,1,0).
@A37 = external constant [1 x i8]
define i1 @test37() nounwind {
; CHECK: @test37
; CHECK: ret i1 true
%t = icmp eq i8* getelementptr ([1 x i8]* @A37, i64 0, i64 1),
getelementptr ([1 x i8]* @A37, i64 1, i64 0)
ret i1 %t
}
; Test index promotion
define i32* @test38(i32* %I, i32 %n) {
%A = getelementptr i32* %I, i32 %n
ret i32* %A
; CHECK: @test38
; CHECK: = sext i32 %n to i64
; CHECK: %A = getelementptr i32* %I, i64 %
}
; Test that we don't duplicate work when the second gep is a "bitcast".
%pr10322_t = type { i8* }
declare void @pr10322_f2(%pr10322_t*)
declare void @pr10322_f3(i8**)
define void @pr10322_f1(%pr10322_t* %foo) {
entry:
%arrayidx8 = getelementptr inbounds %pr10322_t* %foo, i64 2
call void @pr10322_f2(%pr10322_t* %arrayidx8) nounwind
%tmp2 = getelementptr inbounds %pr10322_t* %arrayidx8, i64 0, i32 0
call void @pr10322_f3(i8** %tmp2) nounwind
ret void
; CHECK: @pr10322_f1
; CHECK: %tmp2 = getelementptr inbounds %pr10322_t* %arrayidx8, i64 0, i32 0
}
; Test that we combine the last two geps in this sequence, before we
; would wait for gep1 and gep2 to be combined and never combine 2 and 3.
%three_gep_t = type {i32}
%three_gep_t2 = type {%three_gep_t}
define void @three_gep_f(%three_gep_t2* %x) {
%gep1 = getelementptr %three_gep_t2* %x, i64 2
call void @three_gep_h(%three_gep_t2* %gep1)
%gep2 = getelementptr %three_gep_t2* %gep1, i64 0, i32 0
%gep3 = getelementptr %three_gep_t* %gep2, i64 0, i32 0
call void @three_gep_g(i32* %gep3)
; CHECK: @three_gep_f
; CHECK: %gep3 = getelementptr %three_gep_t2* %gep1, i64 0, i32 0, i32 0
ret void
}
declare void @three_gep_g(i32*)
declare void @three_gep_h(%three_gep_t2*)