-; The %A getelementptr instruction should be eliminated here
+; RUN: opt < %s -instcombine -S | FileCheck %s
-; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine | llvm-dis | grep -v '%B' | not grep getelementptr &&
-; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine | llvm-dis | grep foo1
+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 sbyte] c"helloworld"
-implementation
+@Global = constant [10 x i8] c"helloworld"
-int *%foo1(int* %I) { ; Test noop elimination
- %A = getelementptr int* %I, long 0
- ret int * %A
+; Test noop elimination
+define i32* @test1(i32* %I) {
+ %A = getelementptr i32* %I, i64 0
+ ret i32* %A
+; CHECK: @test1
+; CHECK: ret i32* %I
}
-int* %foo2(int* %I) { ; Test noop elimination
- %A = getelementptr int* %I
- ret int* %A
+; Test noop elimination
+define i32* @test2(i32* %I) {
+ %A = getelementptr i32* %I
+ ret i32* %A
+; CHECK: @test2
+; CHECK: ret i32* %I
}
-int* %foo3(int * %I) { ; Test that two array indexing geps fold
- %A = getelementptr int* %I, long 17
- %B = getelementptr int* %A, long 4
- ret int* %B
+
+; 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
}
-int* %foo4({int} *%I) { ; Test that two getelementptr insts fold
- %A = getelementptr {int}* %I, long 1
- %B = getelementptr {int}* %A, long 0, uint 0
- ret int* %B
+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
}
-void %foo5(sbyte %B) {
- ; This should be turned into a constexpr instead of being an instruction
- %A = getelementptr [10 x sbyte]* %Global, long 0, long 4
- store sbyte %B, sbyte* %A
- ret void
+%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)) [[NUW:#[0-9]+]]
}
-int* %foo6() {
- %M = malloc [4 x int]
- %A = getelementptr [4 x int]* %M, long 0, long 0
- %B = getelementptr int* %A, long 2
- ret int* %B
+; 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)
}
-int* %foo7(int* %I, long %C, long %D) {
- %A = getelementptr int* %I, long %C
- %B = getelementptr int* %A, long %D
- ret int* %B
+; 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
}
-sbyte* %foo8([10 x int]* %X) {
- %A = getelementptr [10 x int]* %X, long 0, long 0 ;; Fold into the cast.
- %B = cast int* %A to sbyte*
- ret sbyte * %B
+; 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 %
}
-int %test9() {
- %A = getelementptr {int, double}* null, int 0, uint 1
- %B = cast double* %A to int
- ret int %B
+; 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
}
-bool %test10({int, int} * %x, {int, int} * %y) {
- %tmp.1 = getelementptr {int,int}* %x, int 0, uint 1
- %tmp.3 = getelementptr {int,int}* %y, int 0, uint 1
- %tmp.4 = seteq int* %tmp.1, %tmp.3 ;; seteq x, y
- ret bool %tmp.4
+; 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
}
-bool %test11({int,int} *%X) {
- %P = getelementptr {int,int}* %X, int 0, uint 0
- %Q = seteq int* %P, null
- ret bool %Q
+declare void @three_gep_g(i32*)
+declare void @three_gep_h(%three_gep_t2*)
+
+%struct.ham = type { i32, %struct.zot*, %struct.zot*, %struct.zot* }
+%struct.zot = type { i64, i8 }
+
+define void @test39(%struct.ham* %arg, i8 %arg1) nounwind {
+ %tmp = getelementptr inbounds %struct.ham* %arg, i64 0, i32 2
+ %tmp2 = load %struct.zot** %tmp, align 8
+ %tmp3 = bitcast %struct.zot* %tmp2 to i8*
+ %tmp4 = getelementptr inbounds i8* %tmp3, i64 -8
+ store i8 %arg1, i8* %tmp4, align 8
+ ret void
+
+; CHECK: @test39
+; CHECK: getelementptr inbounds %struct.ham* %arg, i64 0, i32 2
+; CHECK: getelementptr inbounds i8* %tmp3, i64 -8
}
+
+; CHECK: attributes [[NUW]] = { nounwind }
projects / oota-llvm.git / blobdiff