mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-30 02:32:08 +00:00
30 lines
870 B
LLVM
30 lines
870 B
LLVM
|
; RUN: llvm-as < %s | opt -indvars -loop-deletion | llvm-dis | grep phi | count 1
|
||
|
|
|
||
|
|
; Indvars should be able to evaluate this loop, allowing loop deletion
|
||
|
|
; to delete it.
|
||
|
|
|
||
|
|
define i32 @test(i32 %x_offs) nounwind readnone {
|
||
|
|
entry:
|
||
|
|
%0 = icmp sgt i32 %x_offs, 4 ; <i1> [#uses=1]
|
||
|
|
br i1 %0, label %bb.nph, label %bb2
|
||
|
|
|
||
|
|
bb.nph: ; preds = %entry
|
||
|
|
br label %bb
|
||
|
|
|
||
|
|
bb: ; preds = %bb1, %bb.nph
|
||
|
|
%x_offs_addr.01 = phi i32 [ %1, %bb1 ], [ %x_offs, %bb.nph ] ; <i32> [#uses=1]
|
||
|
|
%1 = add i32 %x_offs_addr.01, -4 ; <i32> [#uses=3]
|
||
|
|
br label %bb1
|
||
|
|
|
||
|
|
bb1: ; preds = %bb
|
||
|
|
%2 = icmp sgt i32 %1, 4 ; <i1> [#uses=1]
|
||
|
|
br i1 %2, label %bb, label %bb1.bb2_crit_edge
|
||
|
|
|
||
|
|
bb1.bb2_crit_edge: ; preds = %bb1
|
||
|
|
br label %bb2
|
||
|
|
|
||
|
|
bb2: ; preds = %bb1.bb2_crit_edge, %entry
|
||
|
|
%x_offs_addr.0.lcssa = phi i32 [ %1, %bb1.bb2_crit_edge ], [ %x_offs, %entry ] ; <i32> [#uses=1]
|
||
|
|
ret i32 %x_offs_addr.0.lcssa
|
||
|
|
}
|