mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 11:42:57 +01:00
27 lines
822 B
LLVM
27 lines
822 B
LLVM
; RUN: opt < %s -analyze -scalar-evolution \
|
|
; RUN: -scalar-evolution-max-iterations=0 | FileCheck %s
|
|
; PR2607
|
|
|
|
define i32 @b(i32 %x, i32 %y) nounwind {
|
|
entry:
|
|
%cmp2 = icmp slt i32 %y, %x
|
|
%cond3 = select i1 %cmp2, i32 %y, i32 %x
|
|
%cmp54 = icmp slt i32 %cond3, -2147483632
|
|
br i1 %cmp54, label %forinc, label %afterfor
|
|
|
|
forinc: ; preds = %forinc, %entry
|
|
%j.01 = phi i32 [ %dec, %forinc ], [ -2147483632, %entry ]
|
|
%dec = add i32 %j.01, -1
|
|
%cmp = icmp slt i32 %y, %x
|
|
%cond = select i1 %cmp, i32 %y, i32 %x
|
|
%cmp5 = icmp sgt i32 %dec, %cond
|
|
br i1 %cmp5, label %forinc, label %afterfor
|
|
|
|
afterfor: ; preds = %forinc, %entry
|
|
%j.0.lcssa = phi i32 [ -2147483632, %entry ], [ %dec, %forinc ]
|
|
ret i32 %j.0.lcssa
|
|
}
|
|
|
|
; CHECK: backedge-taken count is (-2147483632 + ((-1 + (-1 * %{{[xy]}})) smax (-1 + (-1 * %{{[xy]}}))))
|
|
|