mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-02-07 14:33:15 +00:00
062986c2f0
destination. Updated previous implementation to fix a case not covered: // PBI: br i1 %x, TrueDest, BB // BI: br i1 %y, TrueDest, FalseDest The other case was handled correctly. // PBI: br i1 %x, BB, FalseDest // BI: br i1 %y, TrueDest, FalseDest Also tried to use 64-bit arithmetic instead of APInt with scale to simplify the computation. Let me know if you have other opinions about this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163954 91177308-0d34-0410-b5e6-96231b3b80d8
190 lines
3.9 KiB
LLVM
190 lines
3.9 KiB
LLVM
; RUN: opt -simplifycfg -S -o - < %s | FileCheck %s
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declare void @helper(i32)
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define void @test1(i1 %a, i1 %b) {
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; CHECK: @test1
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entry:
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br i1 %a, label %Y, label %X, !prof !0
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; CHECK: br i1 %or.cond, label %Z, label %Y, !prof !0
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X:
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%c = or i1 %b, false
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br i1 %c, label %Z, label %Y, !prof !1
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Y:
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call void @helper(i32 0)
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ret void
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Z:
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call void @helper(i32 1)
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ret void
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}
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define void @test2(i1 %a, i1 %b) {
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; CHECK: @test2
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entry:
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br i1 %a, label %X, label %Y, !prof !1
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; CHECK: br i1 %or.cond, label %Z, label %Y, !prof !1
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; CHECK-NOT: !prof
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X:
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%c = or i1 %b, false
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br i1 %c, label %Z, label %Y, !prof !2
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Y:
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call void @helper(i32 0)
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ret void
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Z:
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call void @helper(i32 1)
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ret void
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}
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define void @test3(i1 %a, i1 %b) {
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; CHECK: @test3
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; CHECK-NOT: !prof
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entry:
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br i1 %a, label %X, label %Y, !prof !1
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X:
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%c = or i1 %b, false
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br i1 %c, label %Z, label %Y
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Y:
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call void @helper(i32 0)
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ret void
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Z:
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call void @helper(i32 1)
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ret void
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}
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define void @test4(i1 %a, i1 %b) {
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; CHECK: @test4
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; CHECK-NOT: !prof
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entry:
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br i1 %a, label %X, label %Y
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X:
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%c = or i1 %b, false
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br i1 %c, label %Z, label %Y, !prof !1
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Y:
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call void @helper(i32 0)
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ret void
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Z:
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call void @helper(i32 1)
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ret void
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}
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;; test5 - The case where it jumps to the default target will be removed.
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define void @test5(i32 %M, i32 %N) nounwind uwtable {
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entry:
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switch i32 %N, label %sw2 [
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i32 1, label %sw2
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i32 2, label %sw.bb
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i32 3, label %sw.bb1
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], !prof !3
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; CHECK: test5
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; CHECK: switch i32 %N, label %sw2 [
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; CHECK: i32 3, label %sw.bb1
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; CHECK: i32 2, label %sw.bb
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; CHECK: ], !prof !2
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sw.bb:
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call void @helper(i32 0)
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br label %sw.epilog
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sw.bb1:
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call void @helper(i32 1)
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br label %sw.epilog
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sw2:
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call void @helper(i32 2)
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br label %sw.epilog
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sw.epilog:
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ret void
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}
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;; test6 - Some cases of the second switch are pruned during optimization.
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;; Then the second switch will be converted to a branch, finally, the first
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;; switch and the branch will be merged into a single switch.
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define void @test6(i32 %M, i32 %N) nounwind uwtable {
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entry:
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switch i32 %N, label %sw2 [
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i32 1, label %sw2
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i32 2, label %sw.bb
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i32 3, label %sw.bb1
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], !prof !4
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; CHECK: test6
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; CHECK: switch i32 %N, label %sw.epilog
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; CHECK: i32 3, label %sw.bb1
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; CHECK: i32 2, label %sw.bb
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; CHECK: i32 4, label %sw.bb5
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; CHECK: ], !prof !3
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sw.bb:
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call void @helper(i32 0)
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br label %sw.epilog
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sw.bb1:
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call void @helper(i32 1)
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br label %sw.epilog
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sw2:
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;; Here "case 2" is invalidated since the default case of the first switch
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;; does not include "case 2".
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switch i32 %N, label %sw.epilog [
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i32 2, label %sw.bb4
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i32 4, label %sw.bb5
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], !prof !5
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sw.bb4:
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call void @helper(i32 2)
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br label %sw.epilog
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sw.bb5:
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call void @helper(i32 3)
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br label %sw.epilog
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sw.epilog:
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ret void
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}
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;; This test is based on test1 but swapped the targets of the second branch.
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define void @test1_swap(i1 %a, i1 %b) {
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; CHECK: @test1_swap
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entry:
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br i1 %a, label %Y, label %X, !prof !0
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; CHECK: br i1 %or.cond, label %Y, label %Z, !prof !4
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X:
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%c = or i1 %b, false
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br i1 %c, label %Y, label %Z, !prof !1
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Y:
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call void @helper(i32 0)
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ret void
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Z:
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call void @helper(i32 1)
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ret void
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}
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!0 = metadata !{metadata !"branch_weights", i32 3, i32 5}
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!1 = metadata !{metadata !"branch_weights", i32 1, i32 1}
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!2 = metadata !{metadata !"branch_weights", i32 1, i32 2}
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!3 = metadata !{metadata !"branch_weights", i32 4, i32 3, i32 2, i32 1}
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!4 = metadata !{metadata !"branch_weights", i32 4, i32 3, i32 2, i32 1}
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!5 = metadata !{metadata !"branch_weights", i32 7, i32 6, i32 5}
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; CHECK: !0 = metadata !{metadata !"branch_weights", i32 5, i32 11}
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; CHECK: !1 = metadata !{metadata !"branch_weights", i32 1, i32 5}
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; CHECK: !2 = metadata !{metadata !"branch_weights", i32 7, i32 1, i32 2}
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; CHECK: !3 = metadata !{metadata !"branch_weights", i32 49, i32 12, i32 24, i32 35}
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; CHECK: !4 = metadata !{metadata !"branch_weights", i32 11, i32 5}
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; CHECK-NOT: !5
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