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llvm-project/llvm/test/Analysis/ScalarEvolution/2008-02-15-UMax.ll

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FileCheck-ize tests. llvm-svn: 188971
2013-08-22 08:51:19 +08:00
; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s
Add 'umax' similar to 'smax' SCEV. Closes PR2003. Parse reversed smax and umax as smin and umin and express them with negative or binary-not SCEVs (which are really just subtract under the hood). Parse 'xor %x, -1' as (-1 - %x). Remove dead code (ConstantInt::get always returns a ConstantInt). Don't use getIntegerSCEV(-1, Ty). The first value is an int, then it gets passed into a uint64_t. Instead, create the -1 directly from ConstantInt::getAllOnesValue(). llvm-svn: 47360
2008-02-20 14:48:22 +08:00
; PR2003
FileCheck-ize tests. llvm-svn: 188971
2013-08-22 08:51:19 +08:00
; CHECK: umax
Add 'umax' similar to 'smax' SCEV. Closes PR2003. Parse reversed smax and umax as smin and umin and express them with negative or binary-not SCEVs (which are really just subtract under the hood). Parse 'xor %x, -1' as (-1 - %x). Remove dead code (ConstantInt::get always returns a ConstantInt). Don't use getIntegerSCEV(-1, Ty). The first value is an int, then it gets passed into a uint64_t. Instead, create the -1 directly from ConstantInt::getAllOnesValue(). llvm-svn: 47360
2008-02-20 14:48:22 +08:00
define i32 @foo(i32 %n) {
entry:
br label %header
header:
%i = phi i32 [ 100, %entry ], [ %i.inc, %next ]
%cond = icmp ult i32 %i, %n
br i1 %cond, label %next, label %return
next:
%i.inc = add i32 %i, 1
br label %header
return:
ret i32 %i
}