llvm-6502/test/Transforms/IndVarsSimplify/2008-10-03-CouldNotCompute.ll
Nick Lewycky 26e4b216c0 Allow the construction of SCEVs with SCEVCouldNotCompute operands, by
implementing folding. Fixes PR2857.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57049 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-04 11:19:07 +00:00

33 lines
946 B
LLVM

; RUN: llvm-as < %s | opt -indvars
; PR2857
@foo = external global i32 ; <i32*> [#uses=1]
define void @test(i32 %n, i32 %arg) {
entry:
br i1 false, label %bb.nph, label %return
bb.nph: ; preds = %entry
%0 = load i32* @foo, align 4 ; <i32> [#uses=1]
%1 = sext i32 %0 to i64 ; <i64> [#uses=1]
br label %bb
bb: ; preds = %bb, %bb.nph
%.in = phi i32 [ %2, %bb ], [ %n, %bb.nph ] ; <i32> [#uses=1]
%val.02 = phi i64 [ %5, %bb ], [ 0, %bb.nph ] ; <i64> [#uses=2]
%result.01 = phi i64 [ %4, %bb ], [ 0, %bb.nph ] ; <i64> [#uses=1]
%2 = add i32 %.in, -1 ; <i32> [#uses=2]
%3 = mul i64 %1, %val.02 ; <i64> [#uses=1]
%4 = add i64 %3, %result.01 ; <i64> [#uses=2]
%5 = add i64 %val.02, 1 ; <i64> [#uses=1]
%6 = icmp sgt i32 %2, 0 ; <i1> [#uses=1]
br i1 %6, label %bb, label %bb3.bb4_crit_edge
bb3.bb4_crit_edge: ; preds = %bb
%.lcssa = phi i64 [ %4, %bb ] ; <i64> [#uses=0]
ret void
return: ; preds = %entry
ret void
}