mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
3dbdfd12d9
This patch was temporarily reverted because it has exposed bug 37229 on PowerPC platform. The bug is unrelated to the patch and was just a general bug in the optimization done for PowerPC platform only. The bug was fixed by the patch rL331410. This patch returns the disabled commit since the bug was fixed. llvm-svn: 331427
62 lines
1.2 KiB
LLVM
62 lines
1.2 KiB
LLVM
; RUN: opt < %s -scalar-evolution -analyze | FileCheck %s
|
|
|
|
; One side exit dominating the latch, exact backedge taken count is known.
|
|
define void @test_01() {
|
|
|
|
; CHECK-LABEL: Determining loop execution counts for: @test_01
|
|
; CHECK-NEXT: Loop %loop: <multiple exits> backedge-taken count is 50
|
|
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i32 [ 0, %entry ], [ %iv.next, %backedge ]
|
|
%side.cond = icmp slt i32 %iv, 50
|
|
br i1 %side.cond, label %backedge, label %side.exit
|
|
|
|
backedge:
|
|
%iv.next = add i32 %iv, 1
|
|
%loop.cond = icmp slt i32 %iv, 100
|
|
br i1 %loop.cond, label %loop, label %exit
|
|
|
|
exit:
|
|
ret void
|
|
|
|
side.exit:
|
|
ret void
|
|
}
|
|
|
|
define void @test_02(i1 %c) {
|
|
|
|
; CHECK-LABEL: Determining loop execution counts for: @test_02
|
|
; CHECK-NEXT: Loop %loop: <multiple exits> backedge-taken count is 50
|
|
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i32 [ 0, %entry ], [ %iv.next, %backedge ]
|
|
br i1 %c, label %if.true, label %if.false
|
|
|
|
if.true:
|
|
br label %merge
|
|
|
|
if.false:
|
|
br label %merge
|
|
|
|
merge:
|
|
%side.cond = icmp slt i32 %iv, 50
|
|
br i1 %side.cond, label %backedge, label %side.exit
|
|
|
|
backedge:
|
|
%iv.next = add i32 %iv, 1
|
|
%loop.cond = icmp slt i32 %iv, 100
|
|
br i1 %loop.cond, label %loop, label %exit
|
|
|
|
exit:
|
|
ret void
|
|
|
|
side.exit:
|
|
ret void
|
|
}
|