mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-28 04:29:44 +00:00
f27a4cd783
missing check that an array reference doesn't go past the end of the array, and remove some redundant checks for in-bound array and vector references that are no longer needed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91897 91177308-0d34-0410-b5e6-96231b3b80d8
54 lines
1.4 KiB
LLVM
54 lines
1.4 KiB
LLVM
; RUN: opt < %s -scalarrepl -S | FileCheck %s
|
|
|
|
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"
|
|
target triple = "i386-pc-linux-gnu"
|
|
|
|
%nested = type { i32, [4 x i32] }
|
|
|
|
; Check that a GEP with a non-zero first index does not prevent SROA as long
|
|
; as the resulting offset corresponds to an element in the alloca.
|
|
define i32 @test1() {
|
|
; CHECK: @test1
|
|
; CHECK-NOT: = i160
|
|
; CHECK: ret i32 undef
|
|
%A = alloca %nested
|
|
%B = getelementptr %nested* %A, i32 0, i32 1, i32 0
|
|
%C = getelementptr i32* %B, i32 2
|
|
%D = load i32* %C
|
|
ret i32 %D
|
|
}
|
|
|
|
; But, if the offset is out of range, then it should not be transformed.
|
|
define i32 @test2() {
|
|
; CHECK: @test2
|
|
; CHECK: i160
|
|
%A = alloca %nested
|
|
%B = getelementptr %nested* %A, i32 0, i32 1, i32 0
|
|
%C = getelementptr i32* %B, i32 4
|
|
%D = load i32* %C
|
|
ret i32 %D
|
|
}
|
|
|
|
; Try it with a bitcast and single GEP....
|
|
define i32 @test3() {
|
|
; CHECK: @test3
|
|
; CHECK-NOT: = i160
|
|
; CHECK: ret i32 undef
|
|
%A = alloca %nested
|
|
%B = bitcast %nested* %A to i32*
|
|
%C = getelementptr i32* %B, i32 2
|
|
%D = load i32* %C
|
|
ret i32 %D
|
|
}
|
|
|
|
; ...and again make sure that out-of-range accesses are not transformed.
|
|
define i32 @test4() {
|
|
; CHECK: @test4
|
|
; CHECK: i160
|
|
%A = alloca %nested
|
|
%B = bitcast %nested* %A to i32*
|
|
%C = getelementptr i32* %B, i32 -1
|
|
%D = load i32* %C
|
|
ret i32 %D
|
|
}
|