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first half of a pass through IndVarSimplify::HandleFloatingPointIV,

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this cleans up a bunch of code and also fixes several crashes and
miscompiles.  More to come unfortunately, this optimization
is quite broken.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100270 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2010-04-03 05:54:59 +00:00
parent 8e9c48a606
commit 07aa76ad93
2 changed files with 54 additions and 47 deletions
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19
test/Transforms/IndVarSimplify/crash.ll Normal file
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@@ -0,0 +1,19 @@
; RUN: opt -indvars %s -disable-output
declare i32 @putchar(i8) nounwind
define void @t2(i1* %P) nounwind {
; <label>:0
br label %1
; <label>:1 ; preds = %1, %0
%2 = phi double [ 9.000000e+00, %0 ], [ %4, %1 ] ; <double> [#uses=1]
%3 = tail call i32 @putchar(i8 72) ; <i32> [#uses=0]
%4 = fadd double %2, -1.000000e+00 ; <double> [#uses=2]
%5 = fcmp ult double %4, 0.000000e+00 ; <i1> [#uses=1]
store i1 %5, i1* %P
br i1 %5, label %6, label %1
; <label>:6 ; preds = %1
ret void
}