heap-sra-2-no-null-opt.ll
1.52 KB
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; RUN: opt < %s -globalopt -S | FileCheck %s
target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
%struct.foo = type { i32, i32 }
@X = internal global %struct.foo* null ; <%struct.foo**> [#uses=2]
; CHECK: @X
; CHECK-NOT: @X.f0
define void @bar(i32 %Size) nounwind noinline #0 {
entry:
%malloccall = tail call i8* @malloc(i64 8000000) ; <i8*> [#uses=1]
%0 = bitcast i8* %malloccall to [1000000 x %struct.foo]* ; <[1000000 x %struct.foo]*> [#uses=1]
%.sub = getelementptr [1000000 x %struct.foo], [1000000 x %struct.foo]* %0, i32 0, i32 0 ; <%struct.foo*> [#uses=1]
store %struct.foo* %.sub, %struct.foo** @X, align 4
ret void
}
declare noalias i8* @malloc(i64)
define i32 @baz() nounwind readonly noinline #0 {
bb1.thread:
%0 = load %struct.foo*, %struct.foo** @X, align 4 ; <%struct.foo*> [#uses=1]
br label %bb1
bb1: ; preds = %bb1, %bb1.thread
%i.0.reg2mem.0 = phi i32 [ 0, %bb1.thread ], [ %indvar.next, %bb1 ] ; <i32> [#uses=2]
%sum.0.reg2mem.0 = phi i32 [ 0, %bb1.thread ], [ %3, %bb1 ] ; <i32> [#uses=1]
%1 = getelementptr %struct.foo, %struct.foo* %0, i32 %i.0.reg2mem.0, i32 0 ; <i32*> [#uses=1]
%2 = load i32, i32* %1, align 4 ; <i32> [#uses=1]
%3 = add i32 %2, %sum.0.reg2mem.0 ; <i32> [#uses=2]
%indvar.next = add i32 %i.0.reg2mem.0, 1 ; <i32> [#uses=2]
%exitcond = icmp eq i32 %indvar.next, 1200 ; <i1> [#uses=1]
br i1 %exitcond, label %bb2, label %bb1
bb2: ; preds = %bb1
ret i32 %3
}
attributes #0 = { "null-pointer-is-valid"="true" }