mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
90d4f3a077
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83802 91177308-0d34-0410-b5e6-96231b3b80d8
346 lines
8.6 KiB
LLVM
346 lines
8.6 KiB
LLVM
; This test makes sure that these instructions are properly eliminated.
|
|
;
|
|
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
|
|
define i32 @test1(i32 %A) {
|
|
; CHECK: @test1
|
|
; CHECK: ret i32 %A
|
|
%B = shl i32 %A, 0 ; <i32> [#uses=1]
|
|
ret i32 %B
|
|
}
|
|
|
|
define i32 @test2(i8 %A) {
|
|
; CHECK: @test2
|
|
; CHECK: ret i32 0
|
|
%shift.upgrd.1 = zext i8 %A to i32 ; <i32> [#uses=1]
|
|
%B = shl i32 0, %shift.upgrd.1 ; <i32> [#uses=1]
|
|
ret i32 %B
|
|
}
|
|
|
|
define i32 @test3(i32 %A) {
|
|
; CHECK: @test3
|
|
; CHECK: ret i32 %A
|
|
%B = ashr i32 %A, 0 ; <i32> [#uses=1]
|
|
ret i32 %B
|
|
}
|
|
|
|
define i32 @test4(i8 %A) {
|
|
; CHECK: @test4
|
|
; CHECK: ret i32 0
|
|
%shift.upgrd.2 = zext i8 %A to i32 ; <i32> [#uses=1]
|
|
%B = ashr i32 0, %shift.upgrd.2 ; <i32> [#uses=1]
|
|
ret i32 %B
|
|
}
|
|
|
|
|
|
define i32 @test5(i32 %A) {
|
|
; CHECK: @test5
|
|
; CHECK: ret i32 0
|
|
%B = lshr i32 %A, 32 ;; shift all bits out
|
|
ret i32 %B
|
|
}
|
|
|
|
define i32 @test5a(i32 %A) {
|
|
; CHECK: @test5a
|
|
; CHECK: ret i32 0
|
|
%B = shl i32 %A, 32 ;; shift all bits out
|
|
ret i32 %B
|
|
}
|
|
|
|
define i32 @test6(i32 %A) {
|
|
; CHECK: @test6
|
|
; CHECK-NEXT: mul i32 %A, 6
|
|
; CHECK-NEXT: ret i32
|
|
%B = shl i32 %A, 1 ;; convert to an mul instruction
|
|
%C = mul i32 %B, 3
|
|
ret i32 %C
|
|
}
|
|
|
|
define i32 @test7(i8 %A) {
|
|
; CHECK: @test7
|
|
; CHECK-NEXT: ret i32 -1
|
|
%shift.upgrd.3 = zext i8 %A to i32
|
|
%B = ashr i32 -1, %shift.upgrd.3 ;; Always equal to -1
|
|
ret i32 %B
|
|
}
|
|
|
|
;; (A << 5) << 3 === A << 8 == 0
|
|
define i8 @test8(i8 %A) {
|
|
; CHECK: @test8
|
|
; CHECK: ret i8 0
|
|
%B = shl i8 %A, 5 ; <i8> [#uses=1]
|
|
%C = shl i8 %B, 3 ; <i8> [#uses=1]
|
|
ret i8 %C
|
|
}
|
|
|
|
;; (A << 7) >> 7 === A & 1
|
|
define i8 @test9(i8 %A) {
|
|
; CHECK: @test9
|
|
; CHECK-NEXT: and i8 %A, 1
|
|
; CHECK-NEXT: ret i8
|
|
%B = shl i8 %A, 7 ; <i8> [#uses=1]
|
|
%C = lshr i8 %B, 7 ; <i8> [#uses=1]
|
|
ret i8 %C
|
|
}
|
|
|
|
;; (A >> 7) << 7 === A & 128
|
|
define i8 @test10(i8 %A) {
|
|
; CHECK: @test10
|
|
; CHECK-NEXT: and i8 %A, -128
|
|
; CHECK-NEXT: ret i8
|
|
%B = lshr i8 %A, 7 ; <i8> [#uses=1]
|
|
%C = shl i8 %B, 7 ; <i8> [#uses=1]
|
|
ret i8 %C
|
|
}
|
|
|
|
;; (A >> 3) << 4 === (A & 0x1F) << 1
|
|
define i8 @test11(i8 %A) {
|
|
; CHECK: @test11
|
|
; CHECK-NEXT: mul i8 %A, 6
|
|
; CHECK-NEXT: and i8
|
|
; CHECK-NEXT: ret i8
|
|
%a = mul i8 %A, 3 ; <i8> [#uses=1]
|
|
%B = lshr i8 %a, 3 ; <i8> [#uses=1]
|
|
%C = shl i8 %B, 4 ; <i8> [#uses=1]
|
|
ret i8 %C
|
|
}
|
|
|
|
;; (A >> 8) << 8 === A & -256
|
|
define i32 @test12(i32 %A) {
|
|
; CHECK: @test12
|
|
; CHECK-NEXT: and i32 %A, -256
|
|
; CHECK-NEXT: ret i32
|
|
%B = ashr i32 %A, 8 ; <i32> [#uses=1]
|
|
%C = shl i32 %B, 8 ; <i32> [#uses=1]
|
|
ret i32 %C
|
|
}
|
|
|
|
;; (A >> 3) << 4 === (A & -8) * 2
|
|
define i8 @test13(i8 %A) {
|
|
; CHECK: @test13
|
|
; CHECK-NEXT: mul i8 %A, 6
|
|
; CHECK-NEXT: and i8
|
|
; CHECK-NEXT: ret i8
|
|
%a = mul i8 %A, 3 ; <i8> [#uses=1]
|
|
%B = ashr i8 %a, 3 ; <i8> [#uses=1]
|
|
%C = shl i8 %B, 4 ; <i8> [#uses=1]
|
|
ret i8 %C
|
|
}
|
|
|
|
;; D = ((B | 1234) << 4) === ((B << 4)|(1234 << 4)
|
|
define i32 @test14(i32 %A) {
|
|
; CHECK: @test14
|
|
; CHECK-NEXT: or i32 %A, 19744
|
|
; CHECK-NEXT: and i32
|
|
; CHECK-NEXT: ret i32
|
|
%B = lshr i32 %A, 4 ; <i32> [#uses=1]
|
|
%C = or i32 %B, 1234 ; <i32> [#uses=1]
|
|
%D = shl i32 %C, 4 ; <i32> [#uses=1]
|
|
ret i32 %D
|
|
}
|
|
|
|
;; D = ((B | 1234) << 4) === ((B << 4)|(1234 << 4)
|
|
define i32 @test14a(i32 %A) {
|
|
; CHECK: @test14a
|
|
; CHECK-NEXT: and i32 %A, 77
|
|
; CHECK-NEXT: ret i32
|
|
%B = shl i32 %A, 4 ; <i32> [#uses=1]
|
|
%C = and i32 %B, 1234 ; <i32> [#uses=1]
|
|
%D = lshr i32 %C, 4 ; <i32> [#uses=1]
|
|
ret i32 %D
|
|
}
|
|
|
|
define i32 @test15(i1 %C) {
|
|
; CHECK: @test15
|
|
; CHECK-NEXT: select i1 %C, i32 12, i32 4
|
|
; CHECK-NEXT: ret i32
|
|
%A = select i1 %C, i32 3, i32 1 ; <i32> [#uses=1]
|
|
%V = shl i32 %A, 2 ; <i32> [#uses=1]
|
|
ret i32 %V
|
|
}
|
|
|
|
define i32 @test15a(i1 %C) {
|
|
; CHECK: @test15a
|
|
; CHECK-NEXT: select i1 %C, i32 512, i32 128
|
|
; CHECK-NEXT: ret i32
|
|
%A = select i1 %C, i8 3, i8 1 ; <i8> [#uses=1]
|
|
%shift.upgrd.4 = zext i8 %A to i32 ; <i32> [#uses=1]
|
|
%V = shl i32 64, %shift.upgrd.4 ; <i32> [#uses=1]
|
|
ret i32 %V
|
|
}
|
|
|
|
define i1 @test16(i32 %X) {
|
|
; CHECK: @test16
|
|
; CHECK-NEXT: and i32 %X, 16
|
|
; CHECK-NEXT: icmp ne i32
|
|
; CHECK-NEXT: ret i1
|
|
%tmp.3 = ashr i32 %X, 4
|
|
%tmp.6 = and i32 %tmp.3, 1
|
|
%tmp.7 = icmp ne i32 %tmp.6, 0
|
|
ret i1 %tmp.7
|
|
}
|
|
|
|
define i1 @test17(i32 %A) {
|
|
; CHECK: @test17
|
|
; CHECK-NEXT: and i32 %A, -8
|
|
; CHECK-NEXT: icmp eq i32
|
|
; CHECK-NEXT: ret i1
|
|
%B = lshr i32 %A, 3 ; <i32> [#uses=1]
|
|
%C = icmp eq i32 %B, 1234 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
|
|
define i1 @test18(i8 %A) {
|
|
; CHECK: @test18
|
|
; CHECK: ret i1 false
|
|
|
|
%B = lshr i8 %A, 7 ; <i8> [#uses=1]
|
|
;; false
|
|
%C = icmp eq i8 %B, 123 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @test19(i32 %A) {
|
|
; CHECK: @test19
|
|
; CHECK-NEXT: icmp ult i32 %A, 4
|
|
; CHECK-NEXT: ret i1
|
|
%B = ashr i32 %A, 2 ; <i32> [#uses=1]
|
|
;; (X & -4) == 0
|
|
%C = icmp eq i32 %B, 0 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
|
|
define i1 @test19a(i32 %A) {
|
|
; CHECK: @test19a
|
|
; CHECK-NEXT: and i32 %A, -4
|
|
; CHECK-NEXT: icmp eq i32
|
|
; CHECK-NEXT: ret i1
|
|
%B = ashr i32 %A, 2 ; <i32> [#uses=1]
|
|
;; (X & -4) == -4
|
|
%C = icmp eq i32 %B, -1 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @test20(i8 %A) {
|
|
; CHECK: @test20
|
|
; CHECK: ret i1 false
|
|
%B = ashr i8 %A, 7 ; <i8> [#uses=1]
|
|
;; false
|
|
%C = icmp eq i8 %B, 123 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @test21(i8 %A) {
|
|
; CHECK: @test21
|
|
; CHECK-NEXT: and i8 %A, 15
|
|
; CHECK-NEXT: icmp eq i8
|
|
; CHECK-NEXT: ret i1
|
|
%B = shl i8 %A, 4 ; <i8> [#uses=1]
|
|
%C = icmp eq i8 %B, -128 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @test22(i8 %A) {
|
|
; CHECK: @test22
|
|
; CHECK-NEXT: and i8 %A, 15
|
|
; CHECK-NEXT: icmp eq i8
|
|
; CHECK-NEXT: ret i1
|
|
%B = shl i8 %A, 4 ; <i8> [#uses=1]
|
|
%C = icmp eq i8 %B, 0 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
define i8 @test23(i32 %A) {
|
|
; CHECK: @test23
|
|
; CHECK-NEXT: trunc i32 %A to i8
|
|
; CHECK-NEXT: ret i8
|
|
|
|
;; casts not needed
|
|
%B = shl i32 %A, 24 ; <i32> [#uses=1]
|
|
%C = ashr i32 %B, 24 ; <i32> [#uses=1]
|
|
%D = trunc i32 %C to i8 ; <i8> [#uses=1]
|
|
ret i8 %D
|
|
}
|
|
|
|
define i8 @test24(i8 %X) {
|
|
; CHECK: @test24
|
|
; CHECK-NEXT: and i8 %X, 3
|
|
; CHECK-NEXT: ret i8
|
|
%Y = and i8 %X, -5 ; <i8> [#uses=1]
|
|
%Z = shl i8 %Y, 5 ; <i8> [#uses=1]
|
|
%Q = ashr i8 %Z, 5 ; <i8> [#uses=1]
|
|
ret i8 %Q
|
|
}
|
|
|
|
define i32 @test25(i32 %tmp.2, i32 %AA) {
|
|
; CHECK: @test25
|
|
; CHECK-NEXT: and i32 %tmp.2, -131072
|
|
; CHECK-NEXT: add i32 %{{[^,]*}}, %AA
|
|
; CHECK-NEXT: and i32 %{{[^,]*}}, -131072
|
|
; CHECK-NEXT: ret i32
|
|
%x = lshr i32 %AA, 17 ; <i32> [#uses=1]
|
|
%tmp.3 = lshr i32 %tmp.2, 17 ; <i32> [#uses=1]
|
|
%tmp.5 = add i32 %tmp.3, %x ; <i32> [#uses=1]
|
|
%tmp.6 = shl i32 %tmp.5, 17 ; <i32> [#uses=1]
|
|
ret i32 %tmp.6
|
|
}
|
|
|
|
;; handle casts between shifts.
|
|
define i32 @test26(i32 %A) {
|
|
; CHECK: @test26
|
|
; CHECK-NEXT: and i32 %A, -2
|
|
; CHECK-NEXT: ret i32
|
|
%B = lshr i32 %A, 1 ; <i32> [#uses=1]
|
|
%C = bitcast i32 %B to i32 ; <i32> [#uses=1]
|
|
%D = shl i32 %C, 1 ; <i32> [#uses=1]
|
|
ret i32 %D
|
|
}
|
|
|
|
|
|
define i1 @test27(i32 %x) nounwind {
|
|
; CHECK: @test27
|
|
; CHECK-NEXT: and i32 %x, 8
|
|
; CHECK-NEXT: icmp ne i32
|
|
; CHECK-NEXT: ret i1
|
|
%y = lshr i32 %x, 3
|
|
%z = trunc i32 %y to i1
|
|
ret i1 %z
|
|
}
|
|
|
|
define i8 @test28(i8 %x) {
|
|
entry:
|
|
; CHECK: @test28
|
|
; CHECK: icmp slt i8 %x, 0
|
|
; CHECK-NEXT: br i1
|
|
%tmp1 = lshr i8 %x, 7
|
|
%cond1 = icmp ne i8 %tmp1, 0
|
|
br i1 %cond1, label %bb1, label %bb2
|
|
|
|
bb1:
|
|
ret i8 0
|
|
|
|
bb2:
|
|
ret i8 1
|
|
}
|
|
|
|
define i8 @test28a(i8 %x, i8 %y) {
|
|
entry:
|
|
; This shouldn't be transformed.
|
|
; CHECK: @test28a
|
|
; CHECK: %tmp1 = lshr i8 %x, 7
|
|
; CHECK: %cond1 = icmp eq i8 %tmp1, 0
|
|
; CHECK: br i1 %cond1, label %bb2, label %bb1
|
|
%tmp1 = lshr i8 %x, 7
|
|
%cond1 = icmp ne i8 %tmp1, 0
|
|
br i1 %cond1, label %bb1, label %bb2
|
|
bb1:
|
|
ret i8 %tmp1
|
|
bb2:
|
|
%tmp2 = add i8 %tmp1, %y
|
|
ret i8 %tmp2
|
|
}
|
|
|
|
|