mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-31 10:29:25 +00:00
5d5261c819
allows us to compile the example in readme.txt into: LBB1_1: ## %bb movl 4(%rdx,%rax), %ecx movl %ecx, %esi imull (%rdx,%rax), %esi imull %esi, %ecx movl %esi, 8(%rdx,%rax) imull %ecx, %esi movl %ecx, 12(%rdx,%rax) movl %esi, 16(%rdx,%rax) imull %ecx, %esi movl %esi, 20(%rdx,%rax) addq $16, %rax cmpq $4000, %rax jne LBB1_1 instead of: LBB1_1: movl (%rdx,%rax), %ecx imull 4(%rdx,%rax), %ecx movl %ecx, 8(%rdx,%rax) imull 4(%rdx,%rax), %ecx movl %ecx, 12(%rdx,%rax) imull 8(%rdx,%rax), %ecx movl %ecx, 16(%rdx,%rax) imull 12(%rdx,%rax), %ecx movl %ecx, 20(%rdx,%rax) addq $16, %rax cmpq $4000, %rax jne LBB1_1 GCC (4.2) doesn't seem to be able to eliminate the loads in this testcase either, it generates: L2: movl (%rdx), %eax imull 4(%rdx), %eax movl %eax, 8(%rdx) imull 4(%rdx), %eax movl %eax, 12(%rdx) imull 8(%rdx), %eax movl %eax, 16(%rdx) imull 12(%rdx), %eax movl %eax, 20(%rdx) addl $4, %ecx addq $16, %rdx cmpl $1002, %ecx jne L2 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89952 91177308-0d34-0410-b5e6-96231b3b80d8
104 lines
2.4 KiB
LLVM
104 lines
2.4 KiB
LLVM
; RUN: opt < %s -gvn -instcombine -S |& FileCheck %s
|
|
; Make sure that basicaa thinks R and r are must aliases.
|
|
|
|
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-f80:128:128"
|
|
|
|
define i32 @test1(i8 * %P) {
|
|
entry:
|
|
%Q = bitcast i8* %P to {i32, i32}*
|
|
%R = getelementptr {i32, i32}* %Q, i32 0, i32 1
|
|
%S = load i32* %R
|
|
|
|
%q = bitcast i8* %P to {i32, i32}*
|
|
%r = getelementptr {i32, i32}* %q, i32 0, i32 1
|
|
%s = load i32* %r
|
|
|
|
%t = sub i32 %S, %s
|
|
ret i32 %t
|
|
; CHECK: @test1
|
|
; CHECK: ret i32 0
|
|
}
|
|
|
|
define i32 @test2(i8 * %P) {
|
|
entry:
|
|
%Q = bitcast i8* %P to {i32, i32, i32}*
|
|
%R = getelementptr {i32, i32, i32}* %Q, i32 0, i32 1
|
|
%S = load i32* %R
|
|
|
|
%r = getelementptr {i32, i32, i32}* %Q, i32 0, i32 2
|
|
store i32 42, i32* %r
|
|
|
|
%s = load i32* %R
|
|
|
|
%t = sub i32 %S, %s
|
|
ret i32 %t
|
|
; CHECK: @test2
|
|
; CHECK: ret i32 0
|
|
}
|
|
|
|
|
|
; This was a miscompilation.
|
|
define i32 @test3({float, {i32, i32, i32}}* %P) {
|
|
entry:
|
|
%P2 = getelementptr {float, {i32, i32, i32}}* %P, i32 0, i32 1
|
|
%R = getelementptr {i32, i32, i32}* %P2, i32 0, i32 1
|
|
%S = load i32* %R
|
|
|
|
%r = getelementptr {i32, i32, i32}* %P2, i32 0, i32 2
|
|
store i32 42, i32* %r
|
|
|
|
%s = load i32* %R
|
|
|
|
%t = sub i32 %S, %s
|
|
ret i32 %t
|
|
; CHECK: @test3
|
|
; CHECK: ret i32 0
|
|
}
|
|
|
|
|
|
;; This is reduced from the SmallPtrSet constructor.
|
|
%SmallPtrSetImpl = type { i8**, i32, i32, i32, [1 x i8*] }
|
|
%SmallPtrSet64 = type { %SmallPtrSetImpl, [64 x i8*] }
|
|
|
|
define i32 @test4(%SmallPtrSet64* %P) {
|
|
entry:
|
|
%tmp2 = getelementptr inbounds %SmallPtrSet64* %P, i64 0, i32 0, i32 1
|
|
store i32 64, i32* %tmp2, align 8
|
|
%tmp3 = getelementptr inbounds %SmallPtrSet64* %P, i64 0, i32 0, i32 4, i64 64
|
|
store i8* null, i8** %tmp3, align 8
|
|
%tmp4 = load i32* %tmp2, align 8
|
|
ret i32 %tmp4
|
|
; CHECK: @test4
|
|
; CHECK: ret i32 64
|
|
}
|
|
|
|
; P[i] != p[i+1]
|
|
define i32 @test5(i32* %p, i64 %i) {
|
|
%pi = getelementptr i32* %p, i64 %i
|
|
%i.next = add i64 %i, 1
|
|
%pi.next = getelementptr i32* %p, i64 %i.next
|
|
%x = load i32* %pi
|
|
store i32 42, i32* %pi.next
|
|
%y = load i32* %pi
|
|
%z = sub i32 %x, %y
|
|
ret i32 %z
|
|
; CHECK: @test5
|
|
; CHECK: ret i32 0
|
|
}
|
|
|
|
; P[i] != p[(i*4)|1]
|
|
define i32 @test6(i32* %p, i64 %i1) {
|
|
%i = shl i64 %i1, 2
|
|
%pi = getelementptr i32* %p, i64 %i
|
|
%i.next = or i64 %i, 1
|
|
%pi.next = getelementptr i32* %p, i64 %i.next
|
|
%x = load i32* %pi
|
|
store i32 42, i32* %pi.next
|
|
%y = load i32* %pi
|
|
%z = sub i32 %x, %y
|
|
ret i32 %z
|
|
; CHECK: @test6
|
|
; CHECK: ret i32 0
|
|
}
|
|
|