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Test scalar evolution directly instead of testing the result of

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canonical indvars.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153256 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick
2012-03-22 17:09:31 +00:00
parent dba95737e0
commit 54e3adea34
1 changed files with 8 additions and 10 deletions
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18
test/Analysis/ScalarEvolution/avoid-smax-1.ll
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@@ -1,14 +1,12 @@
; RUN: opt < %s -indvars -S -enable-iv-rewrite | FileCheck %s
; RUN: opt < %s -analyze -scalar-evolution -S | FileCheck %s
; Indvars should be able to insert a canonical induction variable
; for the bb6 loop without using a maximum calculation (icmp, select)
; because it should be able to prove that the comparison is guarded
; by an appropriate conditional branch. Unfortunately, indvars is
; not yet able to find the comparison for the other two loops in
; this testcase.
; CHECK: entry:
; CHECK-NOT: select
; CHECK: bb6:
; Indvars should be able to find the trip count for the bb6 loop
; without using a maximum calculation (icmp, select) because it should
; be able to prove that the comparison is guarded by an appropriate
; conditional branch. Unfortunately, indvars is not yet able to find
; the comparison for the other two loops in this testcase.
;
; CHECK: Loop %bb6: backedge-taken count is (-1 + %w)
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"