mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-14 11:32:34 +00:00
3e01ae9f8f
The result of x/INT_MIN is either 0 or 1, we can just use an icmp instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212167 91177308-0d34-0410-b5e6-96231b3b80d8
467 lines
11 KiB
LLVM
467 lines
11 KiB
LLVM
target datalayout = "e-p:64:64:64-p1:16:16:16-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
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; Optimize subtracts.
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;
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; RUN: opt < %s -instcombine -S | FileCheck %s
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define i32 @test1(i32 %A) {
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%B = sub i32 %A, %A
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ret i32 %B
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; CHECK-LABEL: @test1(
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; CHECK: ret i32 0
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}
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define i32 @test2(i32 %A) {
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%B = sub i32 %A, 0
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ret i32 %B
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; CHECK-LABEL: @test2(
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; CHECK: ret i32 %A
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}
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define i32 @test3(i32 %A) {
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%B = sub i32 0, %A
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%C = sub i32 0, %B
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ret i32 %C
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; CHECK-LABEL: @test3(
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; CHECK: ret i32 %A
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}
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define i32 @test4(i32 %A, i32 %x) {
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%B = sub i32 0, %A
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%C = sub i32 %x, %B
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ret i32 %C
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; CHECK-LABEL: @test4(
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; CHECK: %C = add i32 %x, %A
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; CHECK: ret i32 %C
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}
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define i32 @test5(i32 %A, i32 %B, i32 %C) {
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%D = sub i32 %B, %C
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%E = sub i32 %A, %D
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ret i32 %E
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; CHECK-LABEL: @test5(
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; CHECK: %D1 = sub i32 %C, %B
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; CHECK: %E = add
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; CHECK: ret i32 %E
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}
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define i32 @test6(i32 %A, i32 %B) {
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%C = and i32 %A, %B
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%D = sub i32 %A, %C
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ret i32 %D
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: xor i32 %B, -1
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; CHECK-NEXT: %D = and i32
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; CHECK-NEXT: ret i32 %D
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}
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define i32 @test7(i32 %A) {
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%B = sub i32 -1, %A
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ret i32 %B
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; CHECK-LABEL: @test7(
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; CHECK: %B = xor i32 %A, -1
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; CHECK: ret i32 %B
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}
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define i32 @test8(i32 %A) {
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%B = mul i32 9, %A
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%C = sub i32 %B, %A
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ret i32 %C
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; CHECK-LABEL: @test8(
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; CHECK: %C = shl i32 %A, 3
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; CHECK: ret i32 %C
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}
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define i32 @test9(i32 %A) {
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%B = mul i32 3, %A
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%C = sub i32 %A, %B
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ret i32 %C
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; CHECK-LABEL: @test9(
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; CHECK: %C = mul i32 %A, -2
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; CHECK: ret i32 %C
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}
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define i32 @test10(i32 %A, i32 %B) {
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%C = sub i32 0, %A
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%D = sub i32 0, %B
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%E = mul i32 %C, %D
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ret i32 %E
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; CHECK-LABEL: @test10(
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; CHECK: %E = mul i32 %A, %B
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; CHECK: ret i32 %E
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}
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define i32 @test10a(i32 %A) {
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%C = sub i32 0, %A
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%E = mul i32 %C, 7
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ret i32 %E
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; CHECK-LABEL: @test10a(
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; CHECK: %E = mul i32 %A, -7
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; CHECK: ret i32 %E
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}
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define i1 @test11(i8 %A, i8 %B) {
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%C = sub i8 %A, %B
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%cD = icmp ne i8 %C, 0
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ret i1 %cD
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; CHECK-LABEL: @test11(
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; CHECK: %cD = icmp ne i8 %A, %B
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; CHECK: ret i1 %cD
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}
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define i32 @test12(i32 %A) {
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%B = ashr i32 %A, 31
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%C = sub i32 0, %B
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ret i32 %C
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; CHECK-LABEL: @test12(
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; CHECK: %C = lshr i32 %A, 31
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; CHECK: ret i32 %C
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}
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define i32 @test13(i32 %A) {
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%B = lshr i32 %A, 31
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%C = sub i32 0, %B
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ret i32 %C
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; CHECK-LABEL: @test13(
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; CHECK: %C = ashr i32 %A, 31
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; CHECK: ret i32 %C
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}
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define i32 @test14(i32 %A) {
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%B = lshr i32 %A, 31
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%C = bitcast i32 %B to i32
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%D = sub i32 0, %C
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ret i32 %D
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; CHECK-LABEL: @test14(
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; CHECK: %D = ashr i32 %A, 31
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; CHECK: ret i32 %D
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}
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define i32 @test15(i32 %A, i32 %B) {
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%C = sub i32 0, %A
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%D = srem i32 %B, %C
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ret i32 %D
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; CHECK-LABEL: @test15(
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; CHECK: %D = srem i32 %B, %A
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; CHECK: ret i32 %D
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}
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define i32 @test16(i32 %A) {
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%X = sdiv i32 %A, 1123
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%Y = sub i32 0, %X
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ret i32 %Y
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; CHECK-LABEL: @test16(
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; CHECK: %Y = sdiv i32 %A, -1123
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; CHECK: ret i32 %Y
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}
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; Can't fold subtract here because negation it might oveflow.
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; PR3142
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define i32 @test17(i32 %A) {
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%B = sub i32 0, %A
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%C = sdiv i32 %B, 1234
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ret i32 %C
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; CHECK-LABEL: @test17(
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; CHECK: %B = sub i32 0, %A
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; CHECK: %C = sdiv i32 %B, 1234
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; CHECK: ret i32 %C
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}
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define i64 @test18(i64 %Y) {
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%tmp.4 = shl i64 %Y, 2
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%tmp.12 = shl i64 %Y, 2
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%tmp.8 = sub i64 %tmp.4, %tmp.12
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ret i64 %tmp.8
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; CHECK-LABEL: @test18(
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; CHECK: ret i64 0
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}
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define i32 @test19(i32 %X, i32 %Y) {
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%Z = sub i32 %X, %Y
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%Q = add i32 %Z, %Y
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ret i32 %Q
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; CHECK-LABEL: @test19(
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; CHECK: ret i32 %X
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}
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define i1 @test20(i32 %g, i32 %h) {
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%tmp.2 = sub i32 %g, %h
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%tmp.4 = icmp ne i32 %tmp.2, %g
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ret i1 %tmp.4
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; CHECK-LABEL: @test20(
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; CHECK: %tmp.4 = icmp ne i32 %h, 0
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; CHECK: ret i1 %tmp.4
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}
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define i1 @test21(i32 %g, i32 %h) {
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%tmp.2 = sub i32 %g, %h
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%tmp.4 = icmp ne i32 %tmp.2, %g
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ret i1 %tmp.4
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; CHECK-LABEL: @test21(
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; CHECK: %tmp.4 = icmp ne i32 %h, 0
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; CHECK: ret i1 %tmp.4
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}
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; PR2298
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define zeroext i1 @test22(i32 %a, i32 %b) nounwind {
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%tmp2 = sub i32 0, %a
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%tmp4 = sub i32 0, %b
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%tmp5 = icmp eq i32 %tmp2, %tmp4
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ret i1 %tmp5
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; CHECK-LABEL: @test22(
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; CHECK: %tmp5 = icmp eq i32 %b, %a
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; CHECK: ret i1 %tmp5
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}
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; rdar://7362831
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define i32 @test23(i8* %P, i64 %A){
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%B = getelementptr inbounds i8* %P, i64 %A
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%C = ptrtoint i8* %B to i64
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%D = trunc i64 %C to i32
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%E = ptrtoint i8* %P to i64
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%F = trunc i64 %E to i32
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%G = sub i32 %D, %F
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ret i32 %G
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; CHECK-LABEL: @test23(
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; CHECK-NEXT: = trunc i64 %A to i32
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; CHECK-NEXT: ret i32
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}
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define i8 @test23_as1(i8 addrspace(1)* %P, i16 %A) {
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; CHECK: @test23_as1
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; CHECK-NEXT: = trunc i16 %A to i8
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; CHECK-NEXT: ret i8
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%B = getelementptr inbounds i8 addrspace(1)* %P, i16 %A
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%C = ptrtoint i8 addrspace(1)* %B to i16
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%D = trunc i16 %C to i8
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%E = ptrtoint i8 addrspace(1)* %P to i16
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%F = trunc i16 %E to i8
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%G = sub i8 %D, %F
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ret i8 %G
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}
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define i64 @test24(i8* %P, i64 %A){
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%B = getelementptr inbounds i8* %P, i64 %A
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%C = ptrtoint i8* %B to i64
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%E = ptrtoint i8* %P to i64
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%G = sub i64 %C, %E
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ret i64 %G
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; CHECK-LABEL: @test24(
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; CHECK-NEXT: ret i64 %A
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}
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define i16 @test24_as1(i8 addrspace(1)* %P, i16 %A) {
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; CHECK: @test24_as1
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; CHECK-NEXT: ret i16 %A
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%B = getelementptr inbounds i8 addrspace(1)* %P, i16 %A
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%C = ptrtoint i8 addrspace(1)* %B to i16
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%E = ptrtoint i8 addrspace(1)* %P to i16
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%G = sub i16 %C, %E
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ret i16 %G
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}
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define i64 @test24a(i8* %P, i64 %A){
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%B = getelementptr inbounds i8* %P, i64 %A
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%C = ptrtoint i8* %B to i64
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%E = ptrtoint i8* %P to i64
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%G = sub i64 %E, %C
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ret i64 %G
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; CHECK-LABEL: @test24a(
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; CHECK-NEXT: sub i64 0, %A
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; CHECK-NEXT: ret i64
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}
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define i16 @test24a_as1(i8 addrspace(1)* %P, i16 %A) {
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; CHECK: @test24a_as1
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; CHECK-NEXT: sub i16 0, %A
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; CHECK-NEXT: ret i16
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%B = getelementptr inbounds i8 addrspace(1)* %P, i16 %A
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%C = ptrtoint i8 addrspace(1)* %B to i16
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%E = ptrtoint i8 addrspace(1)* %P to i16
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%G = sub i16 %E, %C
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ret i16 %G
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}
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@Arr = external global [42 x i16]
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define i64 @test24b(i8* %P, i64 %A){
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%B = getelementptr inbounds [42 x i16]* @Arr, i64 0, i64 %A
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%C = ptrtoint i16* %B to i64
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%G = sub i64 %C, ptrtoint ([42 x i16]* @Arr to i64)
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ret i64 %G
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; CHECK-LABEL: @test24b(
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; CHECK-NEXT: shl nuw i64 %A, 1
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; CHECK-NEXT: ret i64
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}
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define i64 @test25(i8* %P, i64 %A){
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%B = getelementptr inbounds [42 x i16]* @Arr, i64 0, i64 %A
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%C = ptrtoint i16* %B to i64
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%G = sub i64 %C, ptrtoint (i16* getelementptr ([42 x i16]* @Arr, i64 1, i64 0) to i64)
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ret i64 %G
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; CHECK-LABEL: @test25(
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; CHECK-NEXT: shl nuw i64 %A, 1
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; CHECK-NEXT: add i64 {{.*}}, -84
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; CHECK-NEXT: ret i64
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}
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@Arr_as1 = external addrspace(1) global [42 x i16]
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define i16 @test25_as1(i8 addrspace(1)* %P, i64 %A) {
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; CHECK: @test25_as1
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; CHECK-NEXT: %1 = trunc i64 %A to i16
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; CHECK-NEXT: shl nuw i16 %1, 1
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; CHECK-NEXT: add i16 {{.*}}, -84
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; CHECK-NEXT: ret i16
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%B = getelementptr inbounds [42 x i16] addrspace(1)* @Arr_as1, i64 0, i64 %A
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%C = ptrtoint i16 addrspace(1)* %B to i16
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%G = sub i16 %C, ptrtoint (i16 addrspace(1)* getelementptr ([42 x i16] addrspace(1)* @Arr_as1, i64 1, i64 0) to i16)
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ret i16 %G
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}
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define i32 @test26(i32 %x) {
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%shl = shl i32 3, %x
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%neg = sub i32 0, %shl
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ret i32 %neg
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; CHECK-LABEL: @test26(
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; CHECK-NEXT: shl i32 -3
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; CHECK-NEXT: ret i32
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}
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define i32 @test27(i32 %x, i32 %y) {
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%mul = mul i32 %y, -8
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%sub = sub i32 %x, %mul
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ret i32 %sub
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; CHECK-LABEL: @test27(
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; CHECK-NEXT: shl i32 %y, 3
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; CHECK-NEXT: add i32
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; CHECK-NEXT: ret i32
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}
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define i32 @test28(i32 %x, i32 %y, i32 %z) {
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%neg = sub i32 0, %z
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%mul = mul i32 %neg, %y
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%sub = sub i32 %x, %mul
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ret i32 %sub
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; CHECK-LABEL: @test28(
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; CHECK-NEXT: mul i32 %z, %y
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; CHECK-NEXT: add i32
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; CHECK-NEXT: ret i32
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}
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define i64 @test29(i8* %foo, i64 %i, i64 %j) {
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%gep1 = getelementptr inbounds i8* %foo, i64 %i
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%gep2 = getelementptr inbounds i8* %foo, i64 %j
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%cast1 = ptrtoint i8* %gep1 to i64
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%cast2 = ptrtoint i8* %gep2 to i64
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%sub = sub i64 %cast1, %cast2
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ret i64 %sub
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; CHECK-LABEL: @test29(
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; CHECK-NEXT: sub i64 %i, %j
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; CHECK-NEXT: ret i64
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}
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define i64 @test30(i8* %foo, i64 %i, i64 %j) {
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%bit = bitcast i8* %foo to i32*
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%gep1 = getelementptr inbounds i32* %bit, i64 %i
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%gep2 = getelementptr inbounds i8* %foo, i64 %j
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%cast1 = ptrtoint i32* %gep1 to i64
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%cast2 = ptrtoint i8* %gep2 to i64
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%sub = sub i64 %cast1, %cast2
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ret i64 %sub
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; CHECK-LABEL: @test30(
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; CHECK-NEXT: %gep1.idx = shl nuw i64 %i, 2
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; CHECK-NEXT: sub i64 %gep1.idx, %j
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; CHECK-NEXT: ret i64
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}
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define i16 @test30_as1(i8 addrspace(1)* %foo, i16 %i, i16 %j) {
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; CHECK-LABEL: @test30_as1(
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; CHECK-NEXT: %gep1.idx = shl nuw i16 %i, 2
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; CHECK-NEXT: sub i16 %gep1.idx, %j
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; CHECK-NEXT: ret i16
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%bit = bitcast i8 addrspace(1)* %foo to i32 addrspace(1)*
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%gep1 = getelementptr inbounds i32 addrspace(1)* %bit, i16 %i
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%gep2 = getelementptr inbounds i8 addrspace(1)* %foo, i16 %j
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%cast1 = ptrtoint i32 addrspace(1)* %gep1 to i16
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%cast2 = ptrtoint i8 addrspace(1)* %gep2 to i16
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%sub = sub i16 %cast1, %cast2
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ret i16 %sub
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}
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define <2 x i64> @test31(<2 x i64> %A) {
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%xor = xor <2 x i64> %A, <i64 -1, i64 -1>
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%sub = sub <2 x i64> <i64 2, i64 3>, %xor
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ret <2 x i64> %sub
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; CHECK-LABEL: @test31(
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; CHECK-NEXT: %sub = add <2 x i64> %A, <i64 3, i64 4>
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; CHECK-NEXT: ret <2 x i64> %sub
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}
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define <2 x i64> @test32(<2 x i64> %A) {
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%add = add <2 x i64> %A, <i64 -1, i64 -1>
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%sub = sub <2 x i64> <i64 2, i64 3>, %add
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ret <2 x i64> %sub
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; CHECK-LABEL: @test32(
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; CHECK-NEXT: %sub = sub <2 x i64> <i64 3, i64 4>
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; CHECK-NEXT: ret <2 x i64> %sub
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}
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define <2 x i64> @test33(<2 x i1> %A) {
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%ext = zext <2 x i1> %A to <2 x i64>
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%sub = sub <2 x i64> zeroinitializer, %ext
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ret <2 x i64> %sub
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; CHECK-LABEL: @test33(
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; CHECK-NEXT: %sub = sext <2 x i1> %A to <2 x i64>
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; CHECK-NEXT: ret <2 x i64> %sub
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}
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define <2 x i64> @test34(<2 x i1> %A) {
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%ext = sext <2 x i1> %A to <2 x i64>
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%sub = sub <2 x i64> zeroinitializer, %ext
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ret <2 x i64> %sub
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; CHECK-LABEL: @test34(
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; CHECK-NEXT: %sub = zext <2 x i1> %A to <2 x i64>
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; CHECK-NEXT: ret <2 x i64> %sub
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}
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define <2 x i64> @test35(<2 x i64> %A) {
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%mul = mul <2 x i64> %A, <i64 3, i64 4>
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%sub = sub <2 x i64> %A, %mul
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ret <2 x i64> %sub
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; CHECK-LABEL: @test35(
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; CHECK-NEXT: %sub = mul <2 x i64> %A, <i64 -2, i64 -3>
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; CHECK-NEXT: ret <2 x i64> %sub
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}
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define <2 x i64> @test36(<2 x i64> %A) {
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%shl = shl <2 x i64> %A, <i64 3, i64 4>
|
|
%sub = sub <2 x i64> %shl, %A
|
|
ret <2 x i64> %sub
|
|
; CHECK-LABEL: @test36(
|
|
; CHECK-NEXT: %sub = mul <2 x i64> %A, <i64 7, i64 15>
|
|
; CHECK-NEXT: ret <2 x i64> %sub
|
|
}
|
|
|
|
define <2 x i32> @test37(<2 x i32> %A) {
|
|
%div = sdiv <2 x i32> %A, <i32 -2147483648, i32 -2147483648>
|
|
%sub = sub nsw <2 x i32> zeroinitializer, %div
|
|
ret <2 x i32> %sub
|
|
; CHECK-LABEL: @test37(
|
|
; CHECK-NEXT: [[ICMP:%.*]] = icmp eq <2 x i32> %A, <i32 -2147483648, i32 -2147483648>
|
|
; CHECK-NEXT: [[SEXT:%.*]] = sext <2 x i1> [[ICMP]] to <2 x i32>
|
|
; CHECK-NEXT: ret <2 x i32> [[SEXT]]
|
|
}
|
|
|
|
define i32 @test38(i32 %A) {
|
|
%div = sdiv i32 %A, -2147483648
|
|
%sub = sub nsw i32 0, %div
|
|
ret i32 %sub
|
|
; CHECK-LABEL: @test38(
|
|
; CHECK-NEXT: [[ICMP:%.*]] = icmp eq i32 %A, -2147483648
|
|
; CHECK-NEXT: [[SEXT:%.*]] = sext i1 [[ICMP]] to i32
|
|
; CHECK-NEXT: ret i32 [[SEXT]]
|
|
}
|