36 lines
1.1 KiB
LLVM
36 lines
1.1 KiB
LLVM
; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s
|
|
|
|
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
|
|
target triple = "i386-apple-darwin9.6"
|
|
|
|
define i64 @foo(i64* nocapture %x, i64 %n) nounwind {
|
|
; CHECK-LABEL: Classifying expressions for: @foo
|
|
entry:
|
|
%t0 = icmp sgt i64 %n, 0
|
|
br i1 %t0, label %bb, label %return
|
|
|
|
bb:
|
|
%i.01 = phi i64 [ 0, %entry ], [ %indvar.next, %bb ]
|
|
%t1 = shl i64 %i.01, 7
|
|
%t2 = ashr i64 %t1, 7
|
|
; CHECK: %t2 = ashr i64 %t1, 7
|
|
; CHECK-NEXT: sext i57 {0,+,199}<%bb> to i64
|
|
; CHECK-NOT: i57
|
|
; CHECK: %s2 = ashr i64 %s1, 5
|
|
; CHECK-NEXT: sext i59 {0,+,199}<%bb> to i64
|
|
; CHECK-NOT: i59
|
|
%s1 = shl i64 %i.01, 5
|
|
%s2 = ashr i64 %s1, 5
|
|
%t3 = getelementptr i64, i64* %x, i64 %i.01
|
|
store i64 0, i64* %t3, align 1
|
|
%indvar.next = add i64 %i.01, 199
|
|
%exitcond = icmp eq i64 %indvar.next, %n
|
|
br i1 %exitcond, label %return, label %bb
|
|
|
|
return:
|
|
%p = phi i64 [ 0, %entry ], [ %t2, %bb ]
|
|
%q = phi i64 [ 0, %entry ], [ %s2, %bb ]
|
|
%v = xor i64 %p, %q
|
|
ret i64 %v
|
|
}
|