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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | FileCheck %s
target datalayout = "e-p:64:64"
%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 %0* %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* @test6() {
%M = malloc [4 x i32]
%A = getelementptr [4 x i32]* %M, i64 0, i64 0
%B = getelementptr i32* %A, i64 2
ret i32* %B
; CHECK: @test6
; CHECK: getelementptr [4 x i32]* %M, i64 0, i64 2
}
define i32* @test7(i32* %I, i64 %C, i64 %D) {
%A = getelementptr i32* %I, i64 %C ; <i32*> [#uses=1]
%B = getelementptr i32* %A, i64 %D ; <i32*> [#uses=1]
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 ; <i32*> [#uses=1]
%B = bitcast i32* %A to i8* ; <i8*> [#uses=1]
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 ; <double*> [#uses=1]
%B = ptrtoint double* %A to i32 ; <i32> [#uses=1]
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 ; <i32*> [#uses=1]
%tmp.3 = getelementptr { i32, i32 }* %y, i32 0, i32 1 ; <i32*> [#uses=1]
;; seteq x, y
%tmp.4 = icmp eq i32* %tmp.1, %tmp.3 ; <i1> [#uses=1]
ret i1 %tmp.4
; CHECK: @test10
; CHECK: icmp eq %pair* %x, %y
}
define i1 @test11({ i32, i32 }* %X) {
%P = getelementptr { i32, i32 }* %X, i32 0, i32 0 ; <i32*> [#uses=1]
%Q = icmp eq i32* %P, null ; <i1> [#uses=1]
ret i1 %Q
; CHECK: @test11
; CHECK: icmp eq %pair* %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] ; <[3 x i8]*> [#uses=1]
define i8* @test14(i32 %Idx) {
%idx = zext i32 %Idx to i64 ; <i64> [#uses=1]
%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] ; <[40 x i32]*> [#uses=2]
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
}
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